[Dygraph] ppyolo final (#2098)

* add ppyolo in dygraph

* fix bugs

* modify configs

* polish docs, modify ema and add configs

* modify link of model

* fix bugs in ema

* modify code according to review

* modify minicoco configs

dygraph/configs/ppyolo/README.md

+English | [简体中文](README_cn.md)
+
+# PP-YOLO
+
+## Table of Contents
+- [Introduction](#Introduction)
+- [Model Zoo](#Model_Zoo)
+- [Getting Start](#Getting_Start)
+- [Future Work](#Future_Work)
+- [Appendix](#Appendix)
+
+## Introduction
+
+[PP-YOLO](https://arxiv.org/abs/2007.12099) is a optimized model based on YOLOv3 in PaddleDetection，whose performance(mAP on COCO) and inference spped are better than [YOLOv4](https://arxiv.org/abs/2004.10934)，PaddlePaddle 2.0.0rc1(available on pip now) or [Daily Version](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/install/Tables.html#whl-release) is required to run this PP-YOLO。
+
+PP-YOLO reached mmAP(IoU=0.5:0.95) as 45.9% on COCO test-dev2017 dataset, and inference speed of FP32 on single V100 is 72.9 FPS, inference speed of FP16 with TensorRT on single V100 is 155.6 FPS.
+
+<div align="center">
+  <img src="../../../docs/images/ppyolo_map_fps.png" width=500 />
+</div>
+
+PP-YOLO improved performance and speed of YOLOv3 with following methods:
+
+- Better backbone: ResNet50vd-DCN
+- Larger training batch size: 8 GPUs and mini-batch size as 24 on each GPU
+- [Drop Block](https://arxiv.org/abs/1810.12890)
+- [Exponential Moving Average](https://www.investopedia.com/terms/e/ema.asp)
+- [IoU Loss](https://arxiv.org/pdf/1902.09630.pdf)
+- [Grid Sensitive](https://arxiv.org/abs/2004.10934)
+- [Matrix NMS](https://arxiv.org/pdf/2003.10152.pdf)
+- [CoordConv](https://arxiv.org/abs/1807.03247)
+- [Spatial Pyramid Pooling](https://arxiv.org/abs/1406.4729)
+- Better ImageNet pretrain weights
+
+## Model Zoo
+
+### PP-YOLO
+
+|          Model           | GPU number | images/GPU |  backbone  | input shape | Box AP<sup>val</sup> | Box AP<sup>test</sup> | V100 FP32(FPS) | V100 TensorRT FP16(FPS) | download | config  |
+|:------------------------:|:----------:|:----------:|:----------:| :----------:| :------------------: | :-------------------: | :------------: | :---------------------: | :------: | :-----: |
+| PP-YOLO                  |     8      |     24     | ResNet50vd |     608     |         44.8         |         45.2          |      72.9      |          155.6          | [model](https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/dygraph/configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml)                   |
+| PP-YOLO_2x               |     8      |     24     | ResNet50vd |     608     |         45.3         |         45.9          |      72.9      |          155.6          | [model](https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_2x_coco.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/dygraph/configs/ppyolo/ppyolo_r50vd_dcn_2x_coco.yml)                   |
+
+**Notes:**
+
+- PP-YOLO is trained on COCO train2017 dataset and evaluated on val2017 & test-dev2017 dataset，Box AP<sup>test</sup> is evaluation results of `mAP(IoU=0.5:0.95)`.
+- PP-YOLO used 8 GPUs for training and mini-batch size as 24 on each GPU, if GPU number and mini-batch size is changed, learning rate and iteration times should be adjusted according [FAQ](../../../docs/FAQ.md).
+- PP-YOLO inference speed is tesed on single Tesla V100 with batch size as 1, CUDA 10.2, CUDNN 7.5.1, TensorRT 5.1.2.2 in TensorRT mode.
+- PP-YOLO FP32 inference speed testing uses inference model exported by `tools/export_model.py` and benchmarked by running `depoly/python/infer.py` with `--run_benchmark`. All testing results do not contains the time cost of data reading and post-processing(NMS), which is same as [YOLOv4(AlexyAB)](https://github.com/AlexeyAB/darknet) in testing method.
+- TensorRT FP16 inference speed testing exclude the time cost of bounding-box decoding(`yolo_box`) part comparing with FP32 testing above, which means that data reading, bounding-box decoding and post-processing(NMS) is excluded(test method same as [YOLOv4(AlexyAB)](https://github.com/AlexeyAB/darknet) too)
+
+## Getting Start
+
+### 1. Training
+
+Training PP-YOLO on 8 GPUs with following command(all commands should be run under PaddleDetection dygraph directory as default)
+
+```bash
+python -m paddle.distributed.launch --log_dir=./ppyolo_dygraph/ --gpus 0,1,2,3,4,5,6,7 tools/train.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml &>ppyolo_dygraph.log 2>&1 &
+```
+
+### 2. Evaluation
+
+Evaluating PP-YOLO on COCO val2017 dataset in single GPU with following commands:
+
+```bash
+# use weights released in PaddleDetection model zoo
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# use saved checkpoint in training
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=output/ppyolo_r50vd_dcn_1x_coco/model_final
+```
+
+For evaluation on COCO test-dev2017 dataset, `configs/ppyolo/ppyolo_test.yml` should be used, please download COCO test-dev2017 dataset from [COCO dataset download](https://cocodataset.org/#download) and decompress to pathes configured by `EvalReader.dataset` in `configs/ppyolo/ppyolo_test.yml` and run evaluation by following command:
+
+```bash
+# use weights released in PaddleDetection model zoo
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_test.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# use saved checkpoint in training
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_test.yml -o weights=output/ppyolo_r50vd_dcn_1x_coco/model_final
+```
+
+Evaluation results will be saved in `bbox.json`, compress it into a `zip` package and upload to [COCO dataset evaluation](https://competitions.codalab.org/competitions/20794#participate) to evaluate.
+
+**NOTE:** `configs/ppyolo/ppyolo_test.yml` is only used for evaluation on COCO test-dev2017 dataset, could not be used for training or COCO val2017 dataset evaluating.
+
+### 3. Inference
+
+Inference images in single GPU with following commands, use `--infer_img` to inference a single image and `--infer_dir` to inference all images in the directory.
+
+```bash
+# inference single image
+CUDA_VISIBLE_DEVICES=0 python tools/infer.py configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --infer_img=../demo/000000014439_640x640.jpg
+
+# inference all images in the directory
+CUDA_VISIBLE_DEVICES=0 python tools/infer.py configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --infer_dir=../demo
+```
+
+### 4. Inferece deployment and benchmark
+
+For inference deployment or benchmard, model exported with `tools/export_model.py` should be used and perform inference with Paddle inference library with following commands:
+
+```bash
+# export model, model will be save in output/ppyolo as default
+python tools/export_model.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# inference with Paddle Inference library
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True
+```
+
+Benchmark testing for PP-YOLO uses model without data reading and post-processing(NMS), export model with `--exclude_nms` to prunce NMS for benchmark testing from mode with following commands:
+
+```bash
+# export model, --exclude_nms to prune NMS part, model will be save in output/ppyolo as default
+python tools/export_model.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --exclude_nms
+
+# FP32 benchmark
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True --run_benchmark=True
+
+# TensorRT FP16 benchmark
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True --run_benchmark=True --run_mode=trt_fp16
+```
+
+## Future work
+
+1. more PP-YOLO tiny model
+2. PP-YOLO model with more backbones
+
+## Appendix
+
+Optimizing method and ablation experiments of PP-YOLO compared with YOLOv3.
+
+| NO.  |        Model                 | Box AP<sup>val</sup> | Box AP<sup>test</sup> | Params(M) | FLOPs(G) | V100 FP32 FPS |
+| :--: | :--------------------------- | :------------------: |:--------------------: | :-------: | :------: | :-----------: |
+|  A   | YOLOv3-DarkNet53             |         38.9         |           -           |   59.13   |  65.52   |      58.2     |
+|  B   | YOLOv3-ResNet50vd-DCN        |         39.1         |           -           |   43.89   |  44.71   |      79.2     |
+|  C   | B + LB + EMA + DropBlock     |         41.4         |           -           |   43.89   |  44.71   |      79.2     |
+|  D   | C + IoU Loss                 |         41.9         |           -           |   43.89   |  44.71   |      79.2     |
+|  E   | D + IoU Aware                |         42.5         |           -           |   43.90   |  44.71   |      74.9     |
+|  F   | E + Grid Sensitive           |         42.8         |           -           |   43.90   |  44.71   |      74.8     |
+|  G   | F + Matrix NMS               |         43.5         |           -           |   43.90   |  44.71   |      74.8     |
+|  H   | G + CoordConv                |         44.0         |           -           |   43.93   |  44.76   |      74.1     |
+|  I   | H + SPP                      |         44.3         |         45.2          |   44.93   |  45.12   |      72.9     |
+|  J   | I + Better ImageNet Pretrain |         44.8         |         45.2          |   44.93   |  45.12   |      72.9     |
+|  K   | J + 2x Scheduler             |         45.3         |         45.9          |   44.93   |  45.12   |      72.9     |
+
+**Notes:**
+
+- Performance and inference spedd are measure with input shape as 608
+- All models are trained on COCO train2017 datast and evaluated on val2017 & test-dev2017 dataset，`Box AP` is evaluation results as `mAP(IoU=0.5:0.95)`.
+- Inference speed is tested on single Tesla V100 with batch size as 1 following test method and environment configuration in benchmark above.
+- [YOLOv3-DarkNet53](../yolov3/yolov3_darknet53_270e_coco.yml) with mAP as 39.0 is optimized YOLOv3 model in PaddleDetection，see [Model Zoo](../../../docs/MODEL_ZOO.md) for details.

dygraph/configs/ppyolo/README_cn.md

+简体中文 | [English](README.md)
+
+# PP-YOLO 模型
+
+## 内容
+- [简介](#简介)
+- [模型库与基线](#模型库与基线)
+- [使用说明](#使用说明)
+- [未来工作](#未来工作)
+- [附录](#附录)
+
+## 简介
+
+[PP-YOLO](https://arxiv.org/abs/2007.12099)是PaddleDetection优化和改进的YOLOv3的模型，其精度(COCO数据集mAP)和推理速度均优于[YOLOv4](https://arxiv.org/abs/2004.10934)模型，要求使用PaddlePaddle 2.0.0rc1(可使用pip安装) 或适当的[develop版本](https://www.paddlepaddle.org.cn/documentation/docs/zh/develop/install/Tables.html#whl-release)。
+
+PP-YOLO在[COCO](http://cocodataset.org) test-dev2017数据集上精度达到45.9%，在单卡V100上FP32推理速度为72.9 FPS, V100上开启TensorRT下FP16推理速度为155.6 FPS。
+
+<div align="center">
+  <img src="../../../docs/images/ppyolo_map_fps.png" width=500 />
+</div>
+
+PP-YOLO从如下方面优化和提升YOLOv3模型的精度和速度：
+
+- 更优的骨干网络: ResNet50vd-DCN
+- 更大的训练batch size: 8 GPUs，每GPU batch_size=24，对应调整学习率和迭代轮数
+- [Drop Block](https://arxiv.org/abs/1810.12890)
+- [Exponential Moving Average](https://www.investopedia.com/terms/e/ema.asp)
+- [IoU Loss](https://arxiv.org/pdf/1902.09630.pdf)
+- [Grid Sensitive](https://arxiv.org/abs/2004.10934)
+- [Matrix NMS](https://arxiv.org/pdf/2003.10152.pdf)
+- [CoordConv](https://arxiv.org/abs/1807.03247)
+- [Spatial Pyramid Pooling](https://arxiv.org/abs/1406.4729)
+- 更优的预训练模型
+
+## 模型库
+
+### PP-YOLO模型
+
+|          模型            | GPU个数 | 每GPU图片个数 |  骨干网络  | 输入尺寸 | Box AP<sup>val</sup> | Box AP<sup>test</sup> | V100 FP32(FPS) | V100 TensorRT FP16(FPS) | 模型下载 | 配置文件 |
+|:------------------------:|:-------:|:-------------:|:----------:| :-------:| :------------------: | :-------------------: | :------------: | :---------------------: | :------: | :------: |
+| PP-YOLO                  |     8      |     24     | ResNet50vd |     608     |         44.8         |         45.2          |      72.9      |          155.6          | [model](https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/dygraph/configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml)                   |
+| PP-YOLO_2x               |     8      |     24     | ResNet50vd |     608     |         45.3         |         45.9          |      72.9      |          155.6          | [model](https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_2x_coco.pdparams) | [config](https://github.com/PaddlePaddle/PaddleDetection/tree/master/dygraph/configs/ppyolo/ppyolo_r50vd_dcn_2x_coco.yml)                   |
+
+**注意:**
+
+- PP-YOLO模型使用COCO数据集中train2017作为训练集，使用val2017和test-dev2017作为测试集，Box AP<sup>test</sup>为`mAP(IoU=0.5:0.95)`评估结果。
+- PP-YOLO模型训练过程中使用8 GPUs，每GPU batch size为24进行训练，如训练GPU数和batch size不使用上述配置，须参考[FAQ](../../../docs/FAQ.md)调整学习率和迭代次数。
+- PP-YOLO模型推理速度测试采用单卡V100，batch size=1进行测试，使用CUDA 10.2, CUDNN 7.5.1，TensorRT推理速度测试使用TensorRT 5.1.2.2。
+- PP-YOLO模型FP32的推理速度测试数据为使用`tools/export_model.py`脚本导出模型后，使用`deploy/python/infer.py`脚本中的`--run_benchnark`参数使用Paddle预测库进行推理速度benchmark测试结果, 且测试的均为不包含数据预处理和模型输出后处理(NMS)的数据(与[YOLOv4(AlexyAB)](https://github.com/AlexeyAB/darknet)测试方法一致)。
+- TensorRT FP16的速度测试相比于FP32去除了`yolo_box`(bbox解码)部分耗时，即不包含数据预处理，bbox解码和NMS(与[YOLOv4(AlexyAB)](https://github.com/AlexeyAB/darknet)测试方法一致)。
+- PP-YOLO模型推理速度测试采用单卡V100，batch size=1进行测试，使用CUDA 10.2, CUDNN 7.5.1，TensorRT推理速度测试使用TensorRT 5.1.2.2。
+
+## 使用说明
+
+### 1. 训练
+
+使用8GPU通过如下命令一键式启动训练(以下命令均默认在PaddleDetection根目录运行), 通过`--eval`参数开启训练中交替评估。
+
+```bash
+python -m paddle.distributed.launch --log_dir=./ppyolo_dygraph/ --gpus 0,1,2,3,4,5,6,7 tools/train.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml &>ppyolo_dygraph.log 2>&1 &
+```
+
+### 2. 评估
+
+使用单GPU通过如下命令一键式评估模型在COCO val2017数据集效果
+
+```bash
+# 使用PaddleDetection发布的权重
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# 使用训练保存的checkpoint
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=output/ppyolo_r50vd_dcn_1x_coco/model_final
+```
+
+我们提供了`configs/ppyolo/ppyolo_test.yml`用于评估COCO test-dev2017数据集的效果，评估COCO test-dev2017数据集的效果须先从[COCO数据集下载页](https://cocodataset.org/#download)下载test-dev2017数据集，解压到`configs/ppyolo/ppyolo_test.yml`中`EvalReader.dataset`中配置的路径，并使用如下命令进行评估
+
+```bash
+# 使用PaddleDetection发布的权重
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_test.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# 使用训练保存的checkpoint
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/ppyolo/ppyolo_test.yml -o weights=output/ppyolo_r50vd_dcn_1x_coco/model_final
+```
+
+评估结果保存于`bbox.json`中，将其压缩为zip包后通过[COCO数据集评估页](https://competitions.codalab.org/competitions/20794#participate)提交评估。
+
+**注意:** `configs/ppyolo/ppyolo_test.yml`仅用于评估COCO test-dev数据集，不用于训练和评估COCO val2017数据集。
+
+### 3. 推理
+
+使用单GPU通过如下命令一键式推理图像，通过`--infer_img`指定图像路径，或通过`--infer_dir`指定目录并推理目录下所有图像
+
+```bash
+# 推理单张图像
+CUDA_VISIBLE_DEVICES=0 python tools/infer.py configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --infer_img=../demo/000000014439_640x640.jpg
+
+# 推理目录下所有图像
+CUDA_VISIBLE_DEVICES=0 python tools/infer.py configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --infer_dir=../demo
+```
+
+### 4. 推理部署与benchmark
+
+PP-YOLO模型部署及推理benchmark需要通过`tools/export_model.py`导出模型后使用Paddle预测库进行部署和推理，可通过如下命令一键式启动。
+
+```bash
+# 导出模型，默认存储于output/ppyolo目录
+python tools/export_model.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams
+
+# 预测库推理
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True
+```
+
+PP-YOLO模型benchmark测试为不包含数据预处理和网络输出后处理(NMS)的网络结构部分数据，导出模型时须指定`--exlcude_nms`来裁剪掉模型中后处理的NMS部分，通过如下命令进行模型导出和benchmark测试。
+
+```bash
+# 导出模型，通过--exclude_nms参数裁剪掉模型中的NMS部分，默认存储于output/ppyolo目录
+python tools/export_model.py -c configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml -o weights=https://paddlemodels.bj.bcebos.com/object_detection/dygraph/ppyolo_r50vd_dcn_1x_coco.pdparams --exclude_nms
+
+# FP32 benchmark测试
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True --run_benchmark=True
+
+# TensorRT FP16 benchmark测试
+CUDA_VISIBLE_DEVICES=0 python deploy/python/infer.py --model_dir=output_inference/ppyolo_r50vd_dcn_1x_coco --image_file=../demo/000000014439_640x640.jpg --use_gpu=True --run_benchmark=True --run_mode=trt_fp16
+```
+
+## 未来工作
+
+1. 发布PP-YOLO-tiny模型
+2. 发布更多骨干网络的PP-YOLO模型
+
+## 附录
+
+PP-YOLO模型相对于YOLOv3模型优化项消融实验数据如下表所示。
+
+| 序号 |        模型                  | Box AP<sup>val</sup> | Box AP<sup>test</sup> | 参数量(M) | FLOPs(G) | V100 FP32 FPS |
+| :--: | :--------------------------- | :------------------: | :-------------------: | :-------: | :------: | :-----------: |
+|  A   | YOLOv3-DarkNet53             |         38.9         |            -          |   59.13   |  65.52   |      58.2     |
+|  B   | YOLOv3-ResNet50vd-DCN        |         39.1         |            -          |   43.89   |  44.71   |      79.2     |
+|  C   | B + LB + EMA + DropBlock     |         41.4         |            -          |   43.89   |  44.71   |      79.2     |
+|  D   | C + IoU Loss                 |         41.9         |            -          |   43.89   |  44.71   |      79.2     |
+|  E   | D + IoU Aware                |         42.5         |            -          |   43.90   |  44.71   |      74.9     |
+|  F   | E + Grid Sensitive           |         42.8         |            -          |   43.90   |  44.71   |      74.8     |
+|  G   | F + Matrix NMS               |         43.5         |            -          |   43.90   |  44.71   |      74.8     |
+|  H   | G + CoordConv                |         44.0         |            -          |   43.93   |  44.76   |      74.1     |
+|  I   | H + SPP                      |         44.3         |          45.2         |   44.93   |  45.12   |      72.9     |
+|  J   | I + Better ImageNet Pretrain |         44.8         |          45.2         |   44.93   |  45.12   |      72.9     |
+|  K   | J + 2x Scheduler             |         45.3         |          45.9         |   44.93   |  45.12   |      72.9     |
+
+**注意:**
+
+- 精度与推理速度数据均为使用输入图像尺寸为608的测试结果
+- Box AP为在COCO train2017数据集训练，val2017和test-dev2017数据集上评估`mAP(IoU=0.5:0.95)`数据
+- 推理速度为单卡V100上，batch size=1, 使用上述benchmark测试方法的测试结果，测试环境配置为CUDA 10.2，CUDNN 7.5.1
+- [YOLOv3-DarkNet53](../yolov3/yolov3_darknet53_270e_coco.yml)精度38.9为PaddleDetection优化后的YOLOv3模型，可参见[模型库](../../../docs/MODEL_ZOO.md)

dygraph/configs/ppyolo/_base_/optimizer_1x.yml

+epoch: 405
+
+LearningRate:
+  base_lr: 0.01
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones:
+    - 243
+    - 324
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 4000
+
+OptimizerBuilder:
+  clip_grad_by_norm: 35.
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0005
+    type: L2

dygraph/configs/ppyolo/_base_/optimizer_2x.yml

+epoch: 811
+
+LearningRate:
+  base_lr: 0.01
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones:
+    - 649
+    - 730
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 4000
+
+OptimizerBuilder:
+  clip_grad_by_norm: 35.
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0005
+    type: L2

dygraph/configs/ppyolo/_base_/ppyolo_r50vd_dcn.yml

+architecture: YOLOv3
+pretrain_weights: https://paddle-imagenet-models-name.bj.bcebos.com/ResNet50_vd_ssld_pretrained.tar
+weights: output/ppyolo_r50vd_dcn/model_final
+load_static_weights: true
+norm_type: sync_bn
+use_ema: true
+ema_decay: 0.9998
+
+YOLOv3:
+  backbone: ResNet
+  neck: PPYOLOFPN
+  yolo_head: YOLOv3Head
+  post_process: BBoxPostProcess
+
+ResNet:
+  depth: 50
+  variant: d
+  return_idx: [1, 2, 3]
+  dcn_v2_stages: [3]
+  freeze_at: -1
+  freeze_norm: false
+  norm_decay: 0.
+
+PPYOLOFPN:
+  feat_channels: [2048, 1280, 640]
+  coord_conv: true
+  drop_block: true
+  block_size: 3
+  keep_prob: 0.9
+  spp: true
+
+YOLOv3Head:
+  anchors: [[10, 13], [16, 30], [33, 23],
+            [30, 61], [62, 45], [59, 119],
+            [116, 90], [156, 198], [373, 326]]
+  anchor_masks: [[6, 7, 8], [3, 4, 5], [0, 1, 2]]
+  loss: YOLOv3Loss
+  iou_aware: true
+  iou_aware_factor: 0.4
+
+YOLOv3Loss:
+  ignore_thresh: 0.7
+  downsample: [32, 16, 8]
+  label_smooth: false
+  scale_x_y: 1.05
+  iou_loss: IouLoss
+  iou_aware_loss: IouAwareLoss
+
+IouLoss:
+  loss_weight: 2.5
+  loss_square: true
+
+IouAwareLoss:
+  loss_weight: 1.0
+
+BBoxPostProcess:
+  decode:
+    name: YOLOBox
+    conf_thresh: 0.005
+    downsample_ratio: 32
+    clip_bbox: true
+    scale_x_y: 1.05
+  nms:
+    name: MatrixNMS
+    keep_top_k: 100
+    score_threshold: 0.01
+    post_threshold: 0.01
+    nms_top_k: -1
+    normalized: false
+    background_label: -1

dygraph/configs/ppyolo/_base_/ppyolo_reader.yml

+worker_num: 2
+TrainReader:
+  inputs_def:
+    num_max_boxes: 50
+  sample_transforms:
+    - DecodeOp: {}
+    - MixupOp: {alpha: 1.5, beta: 1.5}
+    - RandomDistortOp: {}
+    - RandomExpandOp: {fill_value: [123.675, 116.28, 103.53]}
+    - RandomCropOp: {}
+    - RandomFlipOp: {}
+  batch_transforms:
+    - BatchRandomResizeOp: {target_size: [320, 352, 384, 416, 448, 480, 512, 544, 576, 608], random_size: True, random_interp: True, keep_ratio: False}
+    - NormalizeBoxOp: {}
+    - PadBoxOp: {num_max_boxes: 50}
+    - BboxXYXY2XYWHOp: {}
+    - NormalizeImageOp: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - PermuteOp: {}
+    - Gt2YoloTargetOp: {anchor_masks: [[6, 7, 8], [3, 4, 5], [0, 1, 2]], anchors: [[10, 13], [16, 30], [33, 23], [30, 61], [62, 45], [59, 119], [116, 90], [156, 198], [373, 326]], downsample_ratios: [32, 16, 8]}
+  batch_size: 24
+  shuffle: true
+  drop_last: true
+  mixup_epoch: 25000
+
+
+EvalReader:
+  sample_transforms:
+    - DecodeOp: {}
+    - ResizeOp: {target_size: [608, 608], keep_ratio: False, interp: 2}
+    - NormalizeImageOp: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - PermuteOp: {}
+  batch_size: 8
+  drop_empty: false
+
+TestReader:
+  inputs_def:
+    image_shape: [3, 608, 608]
+  sample_transforms:
+    - DecodeOp: {}
+    - ResizeOp: {target_size: [608, 608], keep_ratio: False, interp: 2}
+    - NormalizeImageOp: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - PermuteOp: {}
+  batch_size: 1

dygraph/configs/ppyolo/ppyolo_r50vd_dcn_1x_coco.yml

+_BASE_: [
+  '../datasets/coco_detection.yml',
+  '../runtime.yml',
+  './_base_/ppyolo_r50vd_dcn.yml',
+  './_base_/optimizer_1x.yml',
+  './_base_/ppyolo_reader.yml',
+]
+
+snapshot_epoch: 16

dygraph/configs/ppyolo/ppyolo_r50vd_dcn_1x_minicoco.yml

+_BASE_: [
+  '../datasets/coco_detection.yml',
+  '../runtime.yml',
+  './_base_/ppyolo_r50vd_dcn.yml',
+  './_base_/optimizer_1x.yml',
+  './_base_/ppyolo_reader.yml',
+]
+
+snapshot_epoch: 8
+use_ema: false
+
+TrainReader:
+  batch_size: 12
+
+TrainDataset:
+  !COCODataSet
+    image_dir: train2017
+    # refer to https://github.com/giddyyupp/coco-minitrain
+    anno_path: annotations/instances_minitrain2017.json
+    dataset_dir: dataset/coco
+    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
+
+epoch: 192
+
+LearningRate:
+  base_lr: 0.005
+  schedulers:
+  - !PiecewiseDecay
+    gamma: 0.1
+    milestones:
+    - 153
+    - 173
+  - !LinearWarmup
+    start_factor: 0.
+    steps: 4000

dygraph/configs/ppyolo/ppyolo_r50vd_dcn_2x_coco.yml

+_BASE_: [
+  '../datasets/coco_detection.yml',
+  '../runtime.yml',
+  './_base_/ppyolo_r50vd_dcn.yml',
+  './_base_/optimizer_2x.yml',
+  './_base_/ppyolo_reader.yml',
+]
+
+snapshot_epoch: 16

dygraph/configs/ppyolo/ppyolo_test.yml

+_BASE_: [
+  '../datasets/coco_detection.yml',
+  '../runtime.yml',
+  './_base_/ppyolo_r50vd_dcn.yml',
+  './_base_/ppyolo_1x.yml',
+  './_base_/ppyolo_reader.yml',
+]
+
+snapshot_epoch: 16
+
+EvalDataset:
+  !COCODataSet
+    image_dir: test2017
+    anno_path: annotations/image_info_test-dev2017.json
+    dataset_dir: dataset/coco

dygraph/ppdet/engine/callbacks.py

@@ -23,6 +23,7 @@ import paddle
 from paddle.distributed import ParallelEnv
 
 from ppdet.utils.checkpoint import save_model
+from ppdet.optimizer import ModelEMA
 
 from ppdet.utils.logger import setup_logger
 logger = setup_logger(__name__)
@@ -135,6 +136,15 @@ class LogPrinter(Callback):
 class Checkpointer(Callback):
     def __init__(self, model):
         super(Checkpointer, self).__init__(model)
+        cfg = self.model.cfg
+        self.use_ema = ('use_ema' in cfg and cfg['use_ema'])
+        if self.use_ema:
+            self.ema = ModelEMA(
+                cfg['ema_decay'], self.model.model, use_thres_step=True)
+
+    def on_step_end(self, status):
+        if self.use_ema:
+            self.ema.update(self.model.model)
 
     def on_epoch_end(self, status):
         assert self.model.mode == 'train', \
@@ -147,5 +157,10 @@ class Checkpointer(Callback):
                                         self.model.cfg.filename)
                 save_name = str(
                     epoch_id) if epoch_id != end_epoch - 1 else "model_final"
-                save_model(self.model.model, self.model.optimizer, save_dir,
-                           save_name, epoch_id + 1)
+                if self.use_ema:
+                    state_dict = self.ema.apply()
+                    save_model(state_dict, self.model.optimizer, save_dir,
+                               save_name, epoch_id + 1)
+                else:
+                    save_model(self.model.model, self.model.optimizer, save_dir,
+                               save_name, epoch_id + 1)

dygraph/ppdet/modeling/architectures/yolo.py

@@ -44,8 +44,9 @@ class YOLOv3(BaseArch):
         return loss
 
     def get_pred(self):
+        yolo_head_outs = self.yolo_head.get_outputs(self.yolo_head_outs)
         bbox, bbox_num = self.post_process(
-            self.yolo_head_outs, self.yolo_head.mask_anchors,
+            yolo_head_outs, self.yolo_head.mask_anchors,
             self.inputs['im_shape'], self.inputs['scale_factor'])
         outs = {
             "bbox": bbox,

dygraph/ppdet/modeling/backbones/resnet.py

@@ -74,7 +74,7 @@ class ConvNormLayer(nn.Layer):
                 padding=(filter_size - 1) // 2,
                 groups=groups,
                 weight_attr=ParamAttr(
-                    learning_rate=lr, name=name + '_weights'),
+                    learning_rate=lr, name=name + "_weights"),
                 bias_attr=False,
                 name=name)
 

dygraph/ppdet/modeling/heads/yolo_head.py

@@ -7,6 +7,13 @@ from ppdet.core.workspace import register
 from ..backbones.darknet import ConvBNLayer
 
 
+def _de_sigmoid(x, eps=1e-7):
+    x = paddle.clip(x, eps, 1. / eps)
+    x = paddle.clip(1. / x - 1., eps, 1. / eps)
+    x = -paddle.log(x)
+    return x
+
+
 @register
 class YOLOv3Head(nn.Layer):
     __shared__ = ['num_classes']
@@ -17,17 +24,25 @@ class YOLOv3Head(nn.Layer):
                           [59, 119], [116, 90], [156, 198], [373, 326]],
                  anchor_masks=[[6, 7, 8], [3, 4, 5], [0, 1, 2]],
                  num_classes=80,
-                 loss='YOLOv3Loss'):
+                 loss='YOLOv3Loss',
+                 iou_aware=False,
+                 iou_aware_factor=0.4):
         super(YOLOv3Head, self).__init__()
         self.num_classes = num_classes
         self.loss = loss
 
+        self.iou_aware = iou_aware
+        self.iou_aware_factor = iou_aware_factor
+
         self.parse_anchor(anchors, anchor_masks)
         self.num_outputs = len(self.anchors)
 
         self.yolo_outputs = []
         for i in range(len(self.anchors)):
-            num_filters = self.num_outputs * (self.num_classes + 5)
+            if self.iou_aware:
+                num_filters = self.num_outputs * (self.num_classes + 6)
+            else:
+                num_filters = self.num_outputs * (self.num_classes + 5)
             name = 'yolo_output.{}'.format(i)
             yolo_output = self.add_sublayer(
                 name,
@@ -62,3 +77,28 @@ class YOLOv3Head(nn.Layer):
 
     def get_loss(self, inputs, targets):
         return self.loss(inputs, targets, self.anchors)
+
+    def get_outputs(self, outputs):
+        if self.iou_aware:
+            y = []
+            for i, out in enumerate(outputs):
+                na = len(self.anchors[i])
+                ioup, x = out[:, 0:na, :, :], out[:, na:, :, :]
+                b, c, h, w = x.shape
+                no = c // na
+                x = x.reshape((b, na, no, h, w))
+                ioup = ioup.reshape((b, na, 1, h, w))
+                obj = x[:, :, 4:5, :, :]
+                ioup = F.sigmoid(ioup)
+                obj = F.sigmoid(obj)
+                obj_t = (obj**(1 - self.iou_aware_factor)) * (
+                    ioup**self.iou_aware_factor)
+                obj_t = _de_sigmoid(obj_t)
+                loc_t = x[:, :, :4, :, :]
+                cls_t = x[:, :, 5:, :, :]
+                y_t = paddle.concat([loc_t, obj_t, cls_t], axis=2)
+                y_t = y_t.reshape((b, -1, h, w))
+                y.append(y_t)
+            return y
+        else:
+            return outputs

dygraph/ppdet/modeling/layers.py

@@ -612,7 +612,6 @@ class MultiClassNMS(object):
 @register
 @serializable
 class MatrixNMS(object):
-    __op__ = ops.matrix_nms
     __append_doc__ = True
 
     def __init__(self,
@@ -634,6 +633,19 @@ class MatrixNMS(object):
         self.gaussian_sigma = gaussian_sigma
         self.background_label = background_label
 
+    def __call__(self, bbox, score):
+        return ops.matrix_nms(
+            bboxes=bbox,
+            scores=score,
+            score_threshold=self.score_threshold,
+            post_threshold=self.post_threshold,
+            nms_top_k=self.nms_top_k,
+            keep_top_k=self.keep_top_k,
+            use_gaussian=self.use_gaussian,
+            gaussian_sigma=self.gaussian_sigma,
+            background_label=self.background_label,
+            normalized=self.normalized)
+
 
 @register
 @serializable

dygraph/ppdet/modeling/losses/iou_aware_loss.py

@@ -16,6 +16,7 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import paddle
 import paddle.nn.functional as F
 from ppdet.core.workspace import register, serializable
 from .iou_loss import IouLoss
@@ -33,27 +34,15 @@ class IouAwareLoss(IouLoss):
         max_width (int): max width of input to support random shape input
     """
 
-    def __init__(
-            self,
-            loss_weight=1.0,
-            giou=False,
-            diou=False,
-            ciou=False, ):
+    def __init__(self, loss_weight=1.0, giou=False, diou=False, ciou=False):
         super(IouAwareLoss, self).__init__(
             loss_weight=loss_weight, giou=giou, diou=diou, ciou=ciou)
 
-    def __call__(self, ioup, pbox, gbox, anchor, downsample, scale=1.):
-        b = pbox.shape[0]
-        ioup = ioup.reshape((b, -1))
-        pbox = decode_yolo(pbox, anchor, downsample)
-        gbox = decode_yolo(gbox, anchor, downsample)
-        pbox = xywh2xyxy(pbox).reshape((b, -1, 4))
-        gbox = xywh2xyxy(gbox).reshape((b, -1, 4))
+    def __call__(self, ioup, pbox, gbox):
         iou = bbox_iou(
             pbox, gbox, giou=self.giou, diou=self.diou, ciou=self.ciou)
         iou.stop_gradient = True
-
-        loss_iou_aware = F.binary_cross_entropy_with_logits(
-            ioup, iou, reduction='none')
+        ioup = F.sigmoid(ioup)
+        loss_iou_aware = (-iou * paddle.log(ioup)).sum(-2, keepdim=True)
         loss_iou_aware = loss_iou_aware * self.loss_weight
         return loss_iou_aware

dygraph/ppdet/modeling/losses/iou_loss.py

@@ -50,12 +50,7 @@ class IouLoss(object):
         self.ciou = ciou
         self.loss_square = loss_square
 
-    def __call__(self, pbox, gbox, anchor, downsample, scale=1.):
-        b = pbox.shape[0]
-        pbox = decode_yolo(pbox, anchor, downsample)
-        gbox = decode_yolo(gbox, anchor, downsample)
-        pbox = xywh2xyxy(pbox).reshape((b, -1, 4))
-        gbox = xywh2xyxy(gbox).reshape((b, -1, 4))
+    def __call__(self, pbox, gbox):
         iou = bbox_iou(
             pbox, gbox, giou=self.giou, diou=self.diou, ciou=self.ciou)
         if self.loss_square:

dygraph/ppdet/modeling/losses/yolo_loss.py

@@ -26,6 +26,12 @@ from ..utils import decode_yolo, xywh2xyxy, iou_similarity
 __all__ = ['YOLOv3Loss']
 
 
+def bbox_transform(pbox, anchor, downsample):
+    pbox = decode_yolo(pbox, anchor, downsample)
+    pbox = xywh2xyxy(pbox)
+    return pbox
+
+
 @register
 class YOLOv3Loss(nn.Layer):
 
@@ -50,11 +56,16 @@ class YOLOv3Loss(nn.Layer):
         self.iou_aware_loss = iou_aware_loss
 
     def obj_loss(self, pbox, gbox, pobj, tobj, anchor, downsample):
-        b, h, w, na = pbox.shape[:4]
+        # pbox
         pbox = decode_yolo(pbox, anchor, downsample)
-        pbox = pbox.reshape((b, -1, 4))
         pbox = xywh2xyxy(pbox)
-        gbox = xywh2xyxy(gbox)
+        pbox = paddle.concat(pbox, axis=-1)
+        b = pbox.shape[0]
+        pbox = pbox.reshape((b, -1, 4))
+        # gbox
+        gxy = gbox[:, :, 0:2] - gbox[:, :, 2:4] * 0.5
+        gwh = gbox[:, :, 0:2] + gbox[:, :, 2:4] * 0.5
+        gbox = paddle.concat([gxy, gwh], axis=-1)
 
         iou = iou_similarity(pbox, gbox)
         iou.stop_gradient = True
@@ -86,57 +97,69 @@ class YOLOv3Loss(nn.Layer):
             pcls, tcls, reduction='none')
         return loss_cls
 
-    def yolov3_loss(self, x, t, gt_box, anchor, downsample, scale=1.,
+    def yolov3_loss(self, p, t, gt_box, anchor, downsample, scale=1.,
                     eps=1e-10):
         na = len(anchor)
-        b, c, h, w = x.shape
-        no = c // na
-        x = x.reshape((b, na, no, h, w)).transpose((0, 3, 4, 1, 2))
-
-        xy, wh, obj = x[:, :, :, :, 0:2], x[:, :, :, :, 2:4], x[:, :, :, :, 4:5]
+        b, c, h, w = p.shape
         if self.iou_aware_loss:
-            ioup, pcls = x[:, :, :, :, 5:6], x[:, :, :, :, 6:]
-        else:
-            pcls = x[:, :, :, :, 5:]
-
-        t = t.transpose((0, 3, 4, 1, 2))
-        txy, twh, tscale = t[:, :, :, :, 0:2], t[:, :, :, :, 2:4], t[:, :, :, :,
-                                                                     4:5]
+            ioup, p = p[:, 0:na, :, :], p[:, na:, :, :]
+            ioup = ioup.unsqueeze(-1)
+        p = p.reshape((b, na, -1, h, w)).transpose((0, 1, 3, 4, 2))
+        x, y = p[:, :, :, :, 0:1], p[:, :, :, :, 1:2]
+        w, h = p[:, :, :, :, 2:3], p[:, :, :, :, 3:4]
+        obj, pcls = p[:, :, :, :, 4:5], p[:, :, :, :, 5:]
+
+        t = t.transpose((0, 1, 3, 4, 2))
+        tx, ty = t[:, :, :, :, 0:1], t[:, :, :, :, 1:2]
+        tw, th = t[:, :, :, :, 2:3], t[:, :, :, :, 3:4]
+        tscale = t[:, :, :, :, 4:5]
         tobj, tcls = t[:, :, :, :, 5:6], t[:, :, :, :, 6:]
 
         tscale_obj = tscale * tobj
         loss = dict()
+
+        x = scale * F.sigmoid(x) - 0.5 * (scale - 1.)
+        y = scale * F.sigmoid(y) - 0.5 * (scale - 1.)
+
         if abs(scale - 1.) < eps:
-            loss_xy = tscale_obj * F.binary_cross_entropy_with_logits(
-                xy, txy, reduction='none')
+            loss_x = F.binary_cross_entropy(x, tx, reduction='none')
+            loss_y = F.binary_cross_entropy(y, ty, reduction='none')
+            loss_xy = tscale_obj * (loss_x + loss_y)
         else:
-            xy = scale * F.sigmoid(xy) - 0.5 * (scale - 1.)
-            loss_xy = tscale_obj * paddle.abs(xy - txy)
+            loss_x = paddle.abs(x - tx)
+            loss_y = paddle.abs(y - ty)
+            loss_xy = tscale_obj * (loss_x + loss_y)
 
         loss_xy = loss_xy.sum([1, 2, 3, 4]).mean()
-        loss_wh = tscale_obj * paddle.abs(wh - twh)
+
+        loss_w = paddle.abs(w - tw)
+        loss_h = paddle.abs(h - th)
+        loss_wh = tscale_obj * (loss_w + loss_h)
         loss_wh = loss_wh.sum([1, 2, 3, 4]).mean()
 
-        loss['loss_loc'] = loss_xy + loss_wh
+        loss['loss_xy'] = loss_xy
+        loss['loss_wh'] = loss_wh
 
-        x[:, :, :, :, 0:2] = scale * F.sigmoid(x[:, :, :, :, 0:2]) - 0.5 * (
-            scale - 1.)
-        box, tbox = x[:, :, :, :, 0:4], t[:, :, :, :, 0:4]
         if self.iou_loss is not None:
-            # box and tbox will not change though they are modified in self.iou_loss function, so no need to clone
-            loss_iou = self.iou_loss(box, tbox, anchor, downsample, scale)
-            loss_iou = loss_iou * tscale_obj.reshape((b, -1))
-            loss_iou = loss_iou.sum(-1).mean()
+            # warn: do not modify x, y, w, h in place
+            box, tbox = [x, y, w, h], [tx, ty, tw, th]
+            pbox = bbox_transform(box, anchor, downsample)
+            gbox = bbox_transform(tbox, anchor, downsample)
+            loss_iou = self.iou_loss(pbox, gbox)
+            loss_iou = loss_iou * tscale_obj
+            loss_iou = loss_iou.sum([1, 2, 3, 4]).mean()
             loss['loss_iou'] = loss_iou
 
         if self.iou_aware_loss is not None:
-            # box and tbox will not change though they are modified in self.iou_aware_loss function, so no need to clone
-            loss_iou_aware = self.iou_aware_loss(ioup, box, tbox, anchor,
-                                                 downsample, scale)
-            loss_iou_aware = loss_iou_aware * tobj.reshape((b, -1))
-            loss_iou_aware = loss_iou_aware.sum(-1).mean()
+            box, tbox = [x, y, w, h], [tx, ty, tw, th]
+            pbox = bbox_transform(box, anchor, downsample)
+            gbox = bbox_transform(tbox, anchor, downsample)
+            loss_iou_aware = self.iou_aware_loss(ioup, pbox, gbox)
+            loss_iou_aware = loss_iou_aware * tobj
+            loss_iou_aware = loss_iou_aware.sum([1, 2, 3, 4]).mean()
             loss['loss_iou_aware'] = loss_iou_aware
 
+        box = [x, y, w, h]
         loss_obj = self.obj_loss(box, gt_box, obj, tobj, anchor, downsample)
         loss_obj = loss_obj.sum(-1).mean()
         loss['loss_obj'] = loss_obj
@@ -152,7 +175,8 @@ class YOLOv3Loss(nn.Layer):
         yolo_losses = dict()
         for x, t, anchor, downsample in zip(inputs, gt_targets, anchors,
                                             self.downsample):
-            yolo_loss = self.yolov3_loss(x, t, gt_box, anchor, downsample)
+            yolo_loss = self.yolov3_loss(x, t, gt_box, anchor, downsample,
+                                         self.scale_x_y)
             for k, v in yolo_loss.items():
                 if k in yolo_losses:
                     yolo_losses[k] += v
@@ -164,4 +188,4 @@ class YOLOv3Loss(nn.Layer):
             loss += v
 
         yolo_losses['loss'] = loss
-        return yolo_losses
+        return yolo_losses
\ No newline at end of file

dygraph/ppdet/modeling/necks/yolo_fpn.py

@@ -18,6 +18,7 @@ import paddle.nn.functional as F
 from paddle import ParamAttr
 from ppdet.core.workspace import register, serializable
 from ..backbones.darknet import ConvBNLayer
+import numpy as np
 
 
 class YoloDetBlock(nn.Layer):
@@ -62,6 +63,101 @@ class YoloDetBlock(nn.Layer):
         return route, tip
 
 
+class SPP(nn.Layer):
+    def __init__(self, ch_in, ch_out, k, pool_size, norm_type, name):
+        super(SPP, self).__init__()
+        self.pool = []
+        for size in pool_size:
+            pool = self.add_sublayer(
+                '{}.pool1'.format(name),
+                nn.MaxPool2D(
+                    kernel_size=size,
+                    stride=1,
+                    padding=size // 2,
+                    ceil_mode=False))
+            self.pool.append(pool)
+        self.conv = ConvBNLayer(
+            ch_in, ch_out, k, padding=k // 2, norm_type=norm_type, name=name)
+
+    def forward(self, x):
+        outs = [x]
+        for pool in self.pool:
+            outs.append(pool(x))
+        y = paddle.concat(outs, axis=1)
+        y = self.conv(y)
+        return y
+
+
+class DropBlock(nn.Layer):
+    def __init__(self, block_size, keep_prob, name):
+        super(DropBlock, self).__init__()
+        self.block_size = block_size
+        self.keep_prob = keep_prob
+        self.name = name
+
+    def forward(self, x):
+        if not self.training or self.keep_prob == 1:
+            return x
+        else:
+            gamma = (1. - self.keep_prob) / (self.block_size**2)
+            for s in x.shape[2:]:
+                gamma *= s / (s - self.block_size + 1)
+
+            matrix = paddle.cast(paddle.rand(x.shape, x.dtype) < gamma, x.dtype)
+            mask_inv = F.max_pool2d(
+                matrix, self.block_size, stride=1, padding=self.block_size // 2)
+            mask = 1. - mask_inv
+            y = x * mask * (mask.numel() / mask.sum())
+            return y
+
+
+class CoordConv(nn.Layer):
+    def __init__(self, ch_in, ch_out, filter_size, padding, norm_type, name):
+        super(CoordConv, self).__init__()
+        self.conv = ConvBNLayer(
+            ch_in + 2,
+            ch_out,
+            filter_size=filter_size,
+            padding=padding,
+            norm_type=norm_type,
+            name=name)
+
+    def forward(self, x):
+        b = x.shape[0]
+        h = x.shape[2]
+        w = x.shape[3]
+
+        gx = paddle.arange(w, dtype='float32') / (w - 1.) * 2.0 - 1.
+        gx = gx.reshape([1, 1, 1, w]).expand([b, 1, h, w])
+        gx.stop_gradient = True
+
+        gy = paddle.arange(h, dtype='float32') / (h - 1.) * 2.0 - 1.
+        gy = gy.reshape([1, 1, h, 1]).expand([b, 1, h, w])
+        gy.stop_gradient = True
+
+        y = paddle.concat([x, gx, gy], axis=1)
+        y = self.conv(y)
+        return y
+
+
+class PPYOLODetBlock(nn.Layer):
+    def __init__(self, cfg, name):
+        super(PPYOLODetBlock, self).__init__()
+        self.conv_module = nn.Sequential()
+        for idx, (conv_name, layer, args, kwargs) in enumerate(cfg[:-1]):
+            kwargs.update(name='{}.{}'.format(name, conv_name))
+            self.conv_module.add_sublayer(conv_name, layer(*args, **kwargs))
+
+        conv_name, layer, args, kwargs = cfg[-1]
+        kwargs.update(name='{}.{}'.format(name, conv_name))
+        self.tip = layer(*args, **kwargs)
+
+    def forward(self, inputs):
+        route = self.conv_module(inputs)
+        tip = self.tip(route)
+        return route, tip
+
+
 @register
 @serializable
 class YOLOv3FPN(nn.Layer):
@@ -114,3 +210,101 @@ class YOLOv3FPN(nn.Layer):
                 route = F.interpolate(route, scale_factor=2.)
 
         return yolo_feats
+
+
+@register
+@serializable
+class PPYOLOFPN(nn.Layer):
+    __shared__ = ['norm_type']
+
+    def __init__(self,
+                 feat_channels=[2048, 1280, 640],
+                 norm_type='bn',
+                 **kwargs):
+        super(PPYOLOFPN, self).__init__()
+        assert len(feat_channels) > 0, "feat_channels length should > 0"
+        self.feat_channels = feat_channels
+        self.num_blocks = len(feat_channels)
+        # parse kwargs
+        self.coord_conv = kwargs.get('coord_conv', False)
+        self.drop_block = kwargs.get('drop_block', False)
+        if self.drop_block:
+            self.block_size = kwargs.get('block_size', 3)
+            self.keep_prob = kwargs.get('keep_prob', 0.9)
+
+        self.spp = kwargs.get('spp', False)
+        if self.coord_conv:
+            ConvLayer = CoordConv
+        else:
+            ConvLayer = ConvBNLayer
+
+        if self.drop_block:
+            dropblock_cfg = [[
+                'dropblock', DropBlock, [self.block_size, self.keep_prob],
+                dict()
+            ]]
+        else:
+            dropblock_cfg = []
+
+        self.yolo_blocks = []
+        self.routes = []
+        for i, ch_in in enumerate(self.feat_channels):
+            channel = 64 * (2**self.num_blocks) // (2**i)
+            base_cfg = [
+                # name of layer, Layer, args
+                ['conv0', ConvLayer, [ch_in, channel, 1]],
+                ['conv1', ConvBNLayer, [channel, channel * 2, 3]],
+                ['conv2', ConvLayer, [channel * 2, channel, 1]],
+                ['conv3', ConvBNLayer, [channel, channel * 2, 3]],
+                ['route', ConvLayer, [channel * 2, channel, 1]],
+                ['tip', ConvLayer, [channel, channel * 2, 3]]
+            ]
+            for conf in base_cfg:
+                filter_size = conf[-1][-1]
+                conf.append(dict(padding=filter_size // 2, norm_type=norm_type))
+            if i == 0:
+                if self.spp:
+                    pool_size = [5, 9, 13]
+                    spp_cfg = [[
+                        'spp', SPP,
+                        [channel * (len(pool_size) + 1), channel, 1], dict(
+                            pool_size=pool_size, norm_type=norm_type)
+                    ]]
+                else:
+                    spp_cfg = []
+                cfg = base_cfg[0:3] + spp_cfg + base_cfg[
+                    3:4] + dropblock_cfg + base_cfg[4:6]
+            else:
+                cfg = base_cfg[0:2] + dropblock_cfg + base_cfg[2:6]
+            name = 'yolo_block.{}'.format(i)
+            yolo_block = self.add_sublayer(name, PPYOLODetBlock(cfg, name))
+            self.yolo_blocks.append(yolo_block)
+            if i < self.num_blocks - 1:
+                name = 'yolo_transition.{}'.format(i)
+                route = self.add_sublayer(
+                    name,
+                    ConvBNLayer(
+                        ch_in=channel,
+                        ch_out=channel // 2,
+                        filter_size=1,
+                        stride=1,
+                        padding=0,
+                        norm_type=norm_type,
+                        name=name))
+                self.routes.append(route)
+
+    def forward(self, blocks):
+        assert len(blocks) == self.num_blocks
+        blocks = blocks[::-1]
+        yolo_feats = []
+        for i, block in enumerate(blocks):
+            if i > 0:
+                block = paddle.concat([route, block], axis=1)
+            route, tip = self.yolo_blocks[i](block)
+            yolo_feats.append(tip)
+
+            if i < self.num_blocks - 1:
+                route = self.routes[i](route)
+                route = F.interpolate(route, scale_factor=2.)
+
+        return yolo_feats
\ No newline at end of file

dygraph/ppdet/modeling/ops.py

@@ -1209,13 +1209,11 @@ def matrix_nms(bboxes,
                  use_gaussian, 'keep_top_k', keep_top_k, 'normalized',
                  normalized)
         out, index, rois_num = core.ops.matrix_nms(bboxes, scores, *attrs)
-        if return_index:
-            if return_rois_num:
-                return out, index, rois_num
-            return out, index
-        if return_rois_num:
-            return out, rois_num
-        return out
+        if not return_index:
+            index = None
+        if not return_rois_num:
+            rois_num = None
+        return out, rois_num, index
     else:
         helper = LayerHelper('matrix_nms', **locals())
         output = helper.create_variable_for_type_inference(dtype=bboxes.dtype)
@@ -1242,13 +1240,11 @@ def matrix_nms(bboxes,
             outputs=outputs)
         output.stop_gradient = True
 
-        if return_index:
-            if return_rois_num:
-                return output, index, rois_num
-            return output, index
-        if return_rois_num:
-            return output, rois_num
-        return output
+        if not return_index:
+            index = None
+        if not return_rois_num:
+            rois_num = None
+        return output, rois_num, index
 
 
 def bipartite_match(dist_matrix,

dygraph/ppdet/modeling/utils/bbox_util.py

@@ -22,10 +22,12 @@ import math
 
 
 def xywh2xyxy(box):
-    out = paddle.zeros_like(box)
-    out[:, :, 0:2] = box[:, :, 0:2] - box[:, :, 2:4] / 2
-    out[:, :, 2:4] = box[:, :, 0:2] + box[:, :, 2:4] / 2
-    return out
+    x, y, w, h = box
+    x1 = x - w * 0.5
+    y1 = y - h * 0.5
+    x2 = x + w * 0.5
+    y2 = y + h * 0.5
+    return [x1, y1, x2, y2]
 
 
 def make_grid(h, w, dtype):
@@ -37,27 +39,27 @@ def decode_yolo(box, anchor, downsample_ratio):
     """decode yolo box
 
     Args:
-        box (Tensor): pred with the shape [b, h, w, na, 4]
+        box (list): [x, y, w, h], all have the shape [b, na, h, w, 1]
         anchor (list): anchor with the shape [na, 2]
         downsample_ratio (int): downsample ratio, default 32
         scale (float): scale, default 1.
-    
+
     Return:
-        box (Tensor): decoded box, with the shape [b, h, w, na, 4]
+        box (list): decoded box, [x, y, w, h], all have the shape [b, na, h, w, 1]
     """
-    h, w, na = box.shape[1:4]
-    grid = make_grid(h, w, box.dtype).reshape((1, h, w, 1, 2))
-    box[:, :, :, :, 0:2] = box[:, :, :, :, :2] + grid
-    box[:, :, :, :, 0] = box[:, :, :, :, 0] / w
-    box[:, :, :, :, 1] = box[:, :, :, :, 1] / h
+    x, y, w, h = box
+    na, grid_h, grid_w = x.shape[1:4]
+    grid = make_grid(grid_h, grid_w, x.dtype).reshape((1, 1, grid_h, grid_w, 2))
+    x1 = (x + grid[:, :, :, :, 0:1]) / grid_w
+    y1 = (y + grid[:, :, :, :, 1:2]) / grid_h
 
     anchor = paddle.to_tensor(anchor)
-    anchor = paddle.cast(anchor, box.dtype)
-    anchor = anchor.reshape((1, 1, 1, na, 2))
-    box[:, :, :, :, 2:4] = paddle.exp(box[:, :, :, :, 2:4]) * anchor
-    box[:, :, :, :, 2] = box[:, :, :, :, 2] / (downsample_ratio * w)
-    box[:, :, :, :, 3] = box[:, :, :, :, 3] / (downsample_ratio * h)
-    return box
+    anchor = paddle.cast(anchor, x.dtype)
+    anchor = anchor.reshape((1, na, 1, 1, 2))
+    w1 = paddle.exp(w) * anchor[:, :, :, :, 0:1] / (downsample_ratio * grid_w)
+    h1 = paddle.exp(h) * anchor[:, :, :, :, 1:2] / (downsample_ratio * grid_h)
+
+    return [x1, y1, w1, h1]
 
 
 def iou_similarity(box1, box2, eps=1e-9):
@@ -66,7 +68,7 @@ def iou_similarity(box1, box2, eps=1e-9):
     Args:
         box1 (Tensor): box with the shape [N, M1, 4]
         box2 (Tensor): box with the shape [N, M2, 4]
-    
+
     Return:
         iou (Tensor): iou between box1 and box2 with the shape [N, M1, M2]
     """
@@ -87,48 +89,56 @@ def bbox_iou(box1, box2, giou=False, diou=False, ciou=False, eps=1e-9):
     """calculate the iou of box1 and box2
 
     Args:
-        box1 (Tensor): box1 with the shape (N, M, 4)
-        box2 (Tensor): box1 with the shape (N, M, 4)
+        box1 (list): [x, y, w, h], all have the shape [b, na, h, w, 1]
+        box2 (list): [x, y, w, h], all have the shape [b, na, h, w, 1]
         giou (bool): whether use giou or not, default False
         diou (bool): whether use diou or not, default False
         ciou (bool): whether use ciou or not, default False
         eps (float): epsilon to avoid divide by zero
 
     Return:
-        iou (Tensor): iou of box1 and box1, with the shape (N, M)
+        iou (Tensor): iou of box1 and box1, with the shape [b, na, h, w, 1]
     """
-    px1y1, px2y2 = box1[:, :, 0:2], box1[:, :, 2:4]
-    gx1y1, gx2y2 = box2[:, :, 0:2], box2[:, :, 2:4]
-    x1y1 = paddle.maximum(px1y1, gx1y1)
-    x2y2 = paddle.minimum(px2y2, gx2y2)
+    px1, py1, px2, py2 = box1
+    gx1, gy1, gx2, gy2 = box2
+    x1 = paddle.maximum(px1, gx1)
+    y1 = paddle.maximum(py1, gy1)
+    x2 = paddle.minimum(px2, gx2)
+    y2 = paddle.minimum(py2, gy2)
+
+    overlap = (x2 - x1) * (y2 - y1)
+    overlap = overlap.clip(0)
+
+    area1 = (px2 - px1) * (py2 - py1)
+    area1 = area1.clip(0)
+
+    area2 = (gx2 - gx1) * (gy2 - gy1)
+    area2 = area2.clip(0)
 
-    overlap = (x2y2 - x1y1).clip(0).prod(-1)
-    area1 = (px2y2 - px1y1).clip(0).prod(-1)
-    area2 = (gx2y2 - gx1y1).clip(0).prod(-1)
     union = area1 + area2 - overlap + eps
     iou = overlap / union
+
     if giou or ciou or diou:
         # convex w, h
-        cwh = paddle.maximum(px2y2, gx2y2) - paddle.minimum(px1y1, gx1y1)
-        if ciou or diou:
+        cw = paddle.maximum(px2, gx2) - paddle.minimum(px1, gx1)
+        ch = paddle.maximum(py2, gy2) - paddle.minimum(py1, gy1)
+        if giou:
+            c_area = cw * ch + eps
+            return iou - (c_area - union) / c_area
+        else:
             # convex diagonal squared
-            c2 = (cwh**2).sum(2) + eps
+            c2 = cw**2 + ch**2 + eps
             # center distance
-            rho2 = ((px1y1 + px2y2 - gx1y1 - gx2y2)**2).sum(2) / 4
+            rho2 = ((px1 + px2 - gx1 - gx2)**2 + (py1 + py2 - gy1 - gy2)**2) / 4
             if diou:
                 return iou - rho2 / c2
-            elif ciou:
-                wh1 = px2y2 - px1y1
-                wh2 = gx2y2 - gx1y1
-                w1, h1 = wh1[:, :, 0], wh1[:, :, 1] + eps
-                w2, h2 = wh2[:, :, 0], wh2[:, :, 1] + eps
-                v = (4 / math.pi**2) * paddle.pow(
-                    paddle.atan(w1 / h1) - paddle.atan(w2 / h2), 2)
+            else:
+                w1, h1 = px2 - px1, py2 - py1 + eps
+                w2, h2 = gx2 - gx1, gy2 - gy1 + eps
+                delta = paddle.atan(w1 / h1) - paddle.atan(w2 / h2)
+                v = (4 / math.pi**2) * paddle.pow(delta, 2)
                 alpha = v / (1 + eps - iou + v)
                 alpha.stop_gradient = True
                 return iou - (rho2 / c2 + v * alpha)
-        else:
-            c_area = cwh.prod(2) + eps
-            return iou - (c_area - union) / c_area
     else:
         return iou

dygraph/ppdet/optimizer.py

@@ -17,6 +17,7 @@ from __future__ import division
 from __future__ import print_function
 
 import math
+import copy
 import paddle
 import paddle.nn as nn
 
@@ -202,7 +203,7 @@ class OptimizerBuilder():
 
     def __call__(self, learning_rate, params=None):
         if self.clip_grad_by_norm is not None:
-            grad_clip = nn.GradientClipByGlobalNorm(
+            grad_clip = nn.ClipGradByGlobalNorm(
                 clip_norm=self.clip_grad_by_norm)
         else:
             grad_clip = None
@@ -223,3 +224,38 @@ class OptimizerBuilder():
                   weight_decay=regularization,
                   grad_clip=grad_clip,
                   **optim_args)
+
+
+class ModelEMA(object):
+    def __init__(self, decay, model, use_thres_step=False):
+        self.step = 0
+        self.decay = decay
+        self.state_dict = dict()
+        for k, v in model.state_dict().items():
+            self.state_dict[k] = paddle.zeros_like(v)
+        self.use_thres_step = use_thres_step
+
+    def update(self, model):
+        if self.use_thres_step:
+            decay = min(self.decay, (1 + self.step) / (10 + self.step))
+        else:
+            decay = self.decay
+        self._decay = decay
+        model_dict = model.state_dict()
+        for k, v in self.state_dict.items():
+            if '_mean' not in k and '_variance' not in k:
+                v = decay * v + (1 - decay) * model_dict[k]
+                v.stop_gradient = True
+                self.state_dict[k] = v
+            else:
+                self.state_dict[k] = model_dict[k]
+        self.step += 1
+
+    def apply(self):
+        state_dict = dict()
+        for k, v in self.state_dict.items():
+            if '_mean' not in k and '_variance' not in k:
+                v = v / (1 - self._decay**self.step)
+                v.stop_gradient = True
+                state_dict[k] = v
+        return state_dict

dygraph/ppdet/utils/checkpoint.py

@@ -23,6 +23,7 @@ import time
 import re
 import numpy as np
 import paddle
+import paddle.nn as nn
 from .download import get_weights_path
 
 from .logger import setup_logger
@@ -169,7 +170,12 @@ def save_model(model, optimizer, save_dir, save_name, last_epoch):
     if not os.path.exists(save_dir):
         os.makedirs(save_dir)
     save_path = os.path.join(save_dir, save_name)
-    paddle.save(model.state_dict(), save_path + ".pdparams")
+    if isinstance(model, nn.Layer):
+        paddle.save(model.state_dict(), save_path + ".pdparams")
+    else:
+        assert isinstance(model,
+                          dict), 'model is not a instance of nn.layer or dict'
+        paddle.save(model, save_path + ".pdparams")
     state_dict = optimizer.state_dict()
     state_dict['last_epoch'] = last_epoch
     paddle.save(state_dict, save_path + ".pdopt")