[MOT] Fix deepsort detectors config (#5344)

* fix deepsort detectors cfgs, add ppyoloe * modify yolov3 40e * add ppyoloe mot17half modelzoo * add resnet embedding reid * remove fasterfpn picodet, fix nms for higher MOTA * add mot17 yml * fix _base_ cfgs * fix doc

[MOT] Fix deepsort detectors config (#5344)
* fix deepsort detectors cfgs, add ppyoloe * modify yolov3 40e * add ppyoloe mot17half modelzoo * add resnet embedding reid * remove fasterfpn picodet, fix nms for higher MOTA * add mot17 yml * fix _base_ cfgs * fix doc
8ffa45af · Feng Ni · GitHub · f08c2ca7 · 8ffa45af · 8ffa45af
22 changed file
--- a/configs/mot/deepsort/README_cn.md
+++ b/configs/mot/deepsort/README_cn.md
@@ -39,11 +39,14 @@
 | :--------         | :-----     | :----:      |:------:  | :----: |:-----: |:----:|:----:   |
 | MIX               | JDE YOLOv3 | PCB Pyramid |  -       |  66.9  |  62.7  |   -    |[配置文件](./deepsort_jde_yolov3_pcb_pyramid.yml) |
 | MIX               | JDE YOLOv3 | PPLCNet     |  -       |  66.3  |  62.1  |   -    |[配置文件](./deepsort_jde_yolov3_pplcnet.yml) |
-| pedestrian(未开放) | YOLOv3     | PPLCNet     |  45.4    |  45.8  |  54.3  |   -    |[配置文件](./deepsort_yolov3_pplcnet.yml) |
+| MOT-17 half train | YOLOv3     | PPLCNet     |  42.7    |  50.2  |  52.4  |   -    |[配置文件](./deepsort_yolov3_pplcnet.yml) |
-| MOT-17 half train | PPYOLOv2   | PPLCNet     |  46.8    |  48.7  |  54.5  |   -    |[配置文件](./deepsort_ppyolov2_pplcnet.yml) |
+| MOT-17 half train | PPYOLOv2   | PPLCNet     |  46.8    |  51.8  |  55.8  |   -    |[配置文件](./deepsort_ppyolov2_pplcnet.yml) |
+| MOT-17 half train | PPYOLOe    | PPLCNet     |  52.9    |  56.7  |  60.5  |   -    |[配置文件](./deepsort_ppyoloe_pplcnet.yml) |
+| MOT-17 half train | PPYOLOe    | ResNet-50   |  52.9    |  56.7  |  64.6  |   -    |[配置文件](./deepsort_ppyoloe_resnet.yml) |
 **注意:**
-DeepSORT不需要训练MOT数据集，只用于评估，现在支持两种评估的方式。
+模型权重下载链接在配置文件中的```det_weights```和```reid_weights```，运行验证的命令即可自动下载。
+DeepSORT是分离检测器和ReID模型的，其中检测器单独训练MOT数据集，而组装成DeepSORT后只用于评估，现在支持两种评估的方式。
 - **方式1**：加载检测结果文件和ReID模型，在使用DeepSORT模型评估之前，应该首先通过一个检测模型得到检测结果，然后像这样准备好结果文件:
 ```
 det_results_dir
@@ -75,6 +78,15 @@ wget https://dataset.bj.bcebos.com/mot/det_results_dir.zip
 ### 1. 评估
+#### 1.1 评估检测效果
+```bash
+CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c configs/mot/deepsort/detector/ppyoloe_crn_l_36e_640x640_mot17half.yml
+```
+**注意:**
+ - 评估检测使用的是```tools/eval.py```, 评估跟踪使用的是```tools/eval_mot.py```。
+#### 1.2 评估跟踪效果
 **方式1**：加载检测结果文件和ReID模型，得到跟踪结果
 ```bash
 CUDA_VISIBLE_DEVICES=0 python tools/eval_mot.py -c configs/mot/deepsort/reid/deepsort_pcb_pyramid_r101.yml --det_results_dir {your detection results}
@@ -89,6 +101,8 @@ CUDA_VISIBLE_DEVICES=0 python tools/eval_mot.py -c configs/mot/deepsort/deepsort
 CUDA_VISIBLE_DEVICES=0 python tools/eval_mot.py -c configs/mot/deepsort/deepsort_jde_yolov3_pplcnet.yml
 # 或者
 CUDA_VISIBLE_DEVICES=0 python tools/eval_mot.py -c configs/mot/deepsort/deepsort_ppyolov2_pplcnet.yml --scaled=True
+# 或者
+CUDA_VISIBLE_DEVICES=0 python tools/eval_mot.py -c configs/mot/deepsort/deepsort_ppyoloe_resnet.yml --scaled=True
 ```
 **注意:**
 - JDE YOLOv3行人检测模型是和JDE和FairMOT使用同样的MOT数据集训练的，因此MOTA较高。而其他通用检测模型如PPYOLOv2只使用了MOT17 half数据集训练。

--- a/configs/mot/deepsort/_base_/mot17.yml
+++ b/configs/mot/deepsort/_base_/mot17.yml
+metric: COCO
+num_classes: 1
+# Detection Dataset for training
+TrainDataset:
+  !COCODataSet
+    dataset_dir: dataset/mot/MOT17
+    anno_path: annotations/train_half.json
+    image_dir: images/train
+    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
+EvalDataset:
+  !COCODataSet
+    dataset_dir: dataset/mot/MOT17
+    anno_path: annotations/val_half.json
+    image_dir: images/train
+TestDataset:
+  !ImageFolder
+    anno_path: annotations/val_half.json
+# MOTDataset for MOT evaluation and inference
+EvalMOTDataset:
+  !MOTImageFolder
+    dataset_dir: dataset/mot
+    data_root: MOT17/images/half
+    keep_ori_im: True # set as True in DeepSORT and ByteTrack
+TestMOTDataset:
+  !MOTImageFolder
+    dataset_dir: dataset/mot
+    keep_ori_im: True # set True if save visualization images or video
--- a/configs/mot/deepsort/deepsort_jde_yolov3_pcb_pyramid.yml
+++ b/configs/mot/deepsort/deepsort_jde_yolov3_pcb_pyramid.yml
 _BASE_: [
  'detector/jde_yolov3_darknet53_30e_1088x608_mix.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT
@@ -30,6 +29,7 @@ DeepSORT:
 # reid and tracker configuration
 # see 'configs/mot/deepsort/reid/deepsort_pcb_pyramid_r101.yml'
 PCBPyramid:
+  model_name: "ResNet101"
  num_conv_out_channels: 128
  num_classes: 751

--- a/configs/mot/deepsort/deepsort_jde_yolov3_pplcnet.yml
+++ b/configs/mot/deepsort/deepsort_jde_yolov3_pplcnet.yml
 _BASE_: [
  'detector/jde_yolov3_darknet53_30e_1088x608_mix.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT

--- a/configs/mot/deepsort/deepsort_picodet_pplcnet.yml
+++ b/configs/mot/deepsort/deepsort_picodet_pplcnet.yml
 _BASE_: [
-  'detector/picodet_l_esnet_300e_896x896_mot17half.yml',
+  'detector/ppyoloe_crn_l_36e_640x640_mot17half.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT
@@ -13,16 +12,35 @@ EvalMOTDataset:
    data_root: MOT17/images/half
    keep_ori_im: True # set as True in DeepSORT
-det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/picodet_l_esnet_300e_896x896_mot17half.pdparams
+det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyoloe_crn_l_36e_640x640_mot17half.pdparams
 reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pplcnet.pdparams
+# reader
+EvalMOTReader:
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
+TestMOTReader:
+  inputs_def:
+    image_shape: [3, 640, 640]
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
 # DeepSORT configuration
 architecture: DeepSORT
 pretrain_weights: None
 DeepSORT:
-  detector: PicoDet
+  detector: YOLOv3 # PPYOLOe version
  reid: PPLCNetEmbedding
  tracker: DeepSORTTracker
@@ -46,46 +64,47 @@ DeepSORTTracker:
  motion: KalmanFilter
-# detector configuration
+# detector configuration: PPYOLOe version
-# see 'configs/mot/deepsort/detector/picodet_l_esnet_300e_640x640_mot17half.yml'
+# see 'configs/mot/deepsort/detector/ppyoloe_crn_l_300e_640x640_mot17half.yml'
-PicoDet:
+YOLOv3:
-  backbone: ESNet
+  backbone: CSPResNet
-  neck: CSPPAN
+  neck: CustomCSPPAN
-  head: PicoHead
+  yolo_head: PPYOLOEHead
+  post_process: ~
+CSPResNet:
+  layers: [3, 6, 6, 3]
+  channels: [64, 128, 256, 512, 1024]
+  return_idx: [1, 2, 3]
+  use_large_stem: True
-PicoHead:
+CustomCSPPAN:
-  conv_feat:
+  out_channels: [768, 384, 192]
-    name: PicoFeat
+  stage_num: 1
-    feat_in: 128
+  block_num: 3
-    feat_out: 128
+  act: 'swish'
-    num_convs: 4
+  spp: true
-    num_fpn_stride: 4
-    norm_type: bn
+# Tracking requires higher quality boxes, so NMS score_threshold will be higher
-    share_cls_reg: False
+PPYOLOEHead:
-  fpn_stride: [8, 16, 32, 64]
+  fpn_strides: [32, 16, 8]
-  feat_in_chan: 128
+  grid_cell_scale: 5.0
-  prior_prob: 0.01
+  grid_cell_offset: 0.5
-  reg_max: 7
+  static_assigner_epoch: -1 # 100
-  cell_offset: 0.5
+  use_varifocal_loss: True
-  loss_class:
+  eval_input_size: [640, 640]
-    name: VarifocalLoss
+  loss_weight: {class: 1.0, iou: 2.5, dfl: 0.5}
-    use_sigmoid: True
+  static_assigner:
-    iou_weighted: True
+    name: ATSSAssigner
-    loss_weight: 1.0
+    topk: 9
-  loss_dfl:
-    name: DistributionFocalLoss
-    loss_weight: 0.25
-  loss_bbox:
-    name: GIoULoss
-    loss_weight: 2.0
  assigner:
-    name: SimOTAAssigner
+    name: TaskAlignedAssigner
-    candidate_topk: 10
+    topk: 13
-    iou_weight: 6
+    alpha: 1.0
+    beta: 6.0
  nms:
    name: MultiClassNMS
    nms_top_k: 1000
    keep_top_k: 100
-    score_threshold: 0.25 # 0.025 in original detector
+    score_threshold: 0.4 # 0.01 in original detector
    nms_threshold: 0.6
--- a/configs/mot/deepsort/deepsort_faster_rcnn_fpn_pplcnet.yml
+++ b/configs/mot/deepsort/deepsort_faster_rcnn_fpn_pplcnet.yml
 _BASE_: [
-  'detector/faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml',
+  'detector/ppyoloe_crn_l_36e_640x640_mot17half.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT
@@ -13,8 +12,27 @@ EvalMOTDataset:
    data_root: MOT17/images/half
    keep_ori_im: True # set as True in DeepSORT
-det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/faster_rcnn_r50_fpn_2x_1333x800_mot17half.pdparams
+det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyoloe_crn_l_36e_640x640_mot17half.pdparams
-reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pplcnet.pdparams
+reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_resnet.pdparams
+# reader
+EvalMOTReader:
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
+TestMOTReader:
+  inputs_def:
+    image_shape: [3, 640, 640]
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
 # DeepSORT configuration
@@ -22,16 +40,15 @@ architecture: DeepSORT
 pretrain_weights: None
 DeepSORT:
-  detector: FasterRCNN
+  detector: YOLOv3 # PPYOLOe version
-  reid: PPLCNetEmbedding
+  reid: ResNetEmbedding
  tracker: DeepSORTTracker
 # reid and tracker configuration
-# see 'configs/mot/deepsort/reid/deepsort_pplcnet.yml'
+# see 'configs/mot/deepsort/reid/deepsort_resnet.yml'
-PPLCNetEmbedding:
+ResNetEmbedding:
-  input_ch: 1280
+  model_name: "ResNet50"
-  output_ch: 512
 DeepSORTTracker:
  input_size: [64, 192]
@@ -46,20 +63,47 @@ DeepSORTTracker:
  motion: KalmanFilter
-# detector configuration
+# detector configuration: PPYOLOe version
-# see 'configs/mot/deepsort/detector/faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml'
+# see 'configs/mot/deepsort/detector/ppyoloe_crn_l_300e_640x640_mot17half.yml'
-FasterRCNN:
+YOLOv3:
-  backbone: ResNet
+  backbone: CSPResNet
-  neck: FPN
+  neck: CustomCSPPAN
-  rpn_head: RPNHead
+  yolo_head: PPYOLOEHead
-  bbox_head: BBoxHead
+  post_process: ~
-  bbox_post_process: BBoxPostProcess
+CSPResNet:
+  layers: [3, 6, 6, 3]
+  channels: [64, 128, 256, 512, 1024]
+  return_idx: [1, 2, 3]
+  use_large_stem: True
+CustomCSPPAN:
+  out_channels: [768, 384, 192]
+  stage_num: 1
+  block_num: 3
+  act: 'swish'
+  spp: true
-# Tracking requires higher quality boxes, so nms.score_threshold will be higher
+# Tracking requires higher quality boxes, so NMS score_threshold will be higher
-BBoxPostProcess:
+PPYOLOEHead:
-  decode: RCNNBox
+  fpn_strides: [32, 16, 8]
+  grid_cell_scale: 5.0
+  grid_cell_offset: 0.5
+  static_assigner_epoch: -1 # 100
+  use_varifocal_loss: True
+  eval_input_size: [640, 640]
+  loss_weight: {class: 1.0, iou: 2.5, dfl: 0.5}
+  static_assigner:
+    name: ATSSAssigner
+    topk: 9
+  assigner:
+    name: TaskAlignedAssigner
+    topk: 13
+    alpha: 1.0
+    beta: 6.0
  nms:
    name: MultiClassNMS
+    nms_top_k: 1000
    keep_top_k: 100
-    score_threshold: 0.2 # 0.05 in original detector
+    score_threshold: 0.4 # 0.01 in original detector
-    nms_threshold: 0.5
+    nms_threshold: 0.6
--- a/configs/mot/deepsort/deepsort_ppyolov2_pplcnet.yml
+++ b/configs/mot/deepsort/deepsort_ppyolov2_pplcnet.yml
 _BASE_: [
  'detector/ppyolov2_r50vd_dcn_365e_640x640_mot17half.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT
@@ -16,6 +15,25 @@ EvalMOTDataset:
 det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyolov2_r50vd_dcn_365e_640x640_mot17half.pdparams
 reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pplcnet.pdparams
+# reader
+EvalMOTReader:
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
+TestMOTReader:
+  inputs_def:
+    image_shape: [3, 640, 640]
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [640, 640], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
 # DeepSORT configuration
 architecture: DeepSORT
@@ -63,7 +81,7 @@ ResNet:
  freeze_norm: false
  norm_decay: 0.
-# Tracking requires higher quality boxes, so decode.conf_thresh will be higher
+# Tracking requires higher quality boxes, so NMS score_threshold will be higher
 BBoxPostProcess:
  decode:
    name: YOLOBox
@@ -74,7 +92,7 @@ BBoxPostProcess:
  nms:
    name: MatrixNMS
    keep_top_k: 100
-    score_threshold: 0.25 # 0.01 in original detector
+    score_threshold: 0.4 # 0.01 in original detector
-    post_threshold: 0.25 # 0.01 in original detector
+    post_threshold: 0.4 # 0.01 in original detector
    nms_top_k: -1
    background_label: -1
--- a/configs/mot/deepsort/deepsort_yolov3_pplcnet.yml
+++ b/configs/mot/deepsort/deepsort_yolov3_pplcnet.yml
 _BASE_: [
-  'detector/yolov3_darknet53_270e_608x608_pedestrian.yml',
+  'detector/yolov3_darknet53_40e_608x608_mot17half.yml',
-  '../../datasets/mot.yml',
+  '_base_/mot17.yml',
-  '../../runtime.yml',
  '_base_/deepsort_reader_1088x608.yml',
 ]
 metric: MOT
@@ -13,9 +12,28 @@ EvalMOTDataset:
    data_root: MOT17/images/half
    keep_ori_im: True # set as True in DeepSORT
-det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_270e_608x608_pedestrian.pdparams
+det_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_40e_608x608_mot17half.pdparams
 reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pplcnet.pdparams
+# reader
+EvalMOTReader:
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [608, 608], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
+TestMOTReader:
+  inputs_def:
+    image_shape: [3, 608, 608]
+  sample_transforms:
+    - Decode: {}
+    - Resize: {target_size: [608, 608], keep_ratio: False, interp: 2}
+    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
+    - Permute: {}
+  batch_size: 1
 # DeepSORT configuration
 architecture: DeepSORT
@@ -47,23 +65,23 @@ DeepSORTTracker:
 # detector configuration: General YOLOv3 version
-# see 'configs/mot/deepsort/detector/yolov3_darknet53_270e_608x608_pedestrian.yml'
+# see 'configs/mot/deepsort/detector/yolov3_darknet53_40e_608x608_mot17half.yml'
 YOLOv3:
  backbone: DarkNet
  neck: YOLOv3FPN
  yolo_head: YOLOv3Head
  post_process: BBoxPostProcess
-# Tracking requires higher quality boxes, so decode.conf_thresh will be higher
+# Tracking requires higher quality boxes, so NMS score_threshold will be higher
 BBoxPostProcess:
  decode:
    name: YOLOBox
-    conf_thresh: 0.1 # 0.005 in original detector
+    conf_thresh: 0.005
    downsample_ratio: 32
    clip_bbox: true
  nms:
    name: MultiClassNMS
    keep_top_k: 100
-    score_threshold: 0.01
+    score_threshold: 0.3 # 0.01 in original detector
    nms_threshold: 0.45
    nms_top_k: 1000
--- a/configs/mot/deepsort/detector/README.md
+++ b/configs/mot/deepsort/detector/README.md
@@ -9,13 +9,12 @@ English | [简体中文](README_cn.md)
 ### Results on MOT17-half dataset
 | Backbone        | Model           | input size  | lr schedule |  FPS          | Box AP  |  download    | config  |
 | :-------------- | :-------------  | :--------:  | :---------: | :-----------: | :-----: | :----------: | :-----: |
+| DarkNet-53      | YOLOv3          |   608X608   |   40e      |      ----     |  42.7   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_40e_608x608_mot17half.pdparams)  | [config](./yolov3_darknet53_40e_608x608_mot17half.yml) |
 | ResNet50-vd     | PPYOLOv2        |   640x640   |   365e      |      ----     |  46.8   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyolov2_r50vd_dcn_365e_640x640_mot17half.pdparams)  | [config](./ppyolov2_r50vd_dcn_365e_640x640_mot17half.yml) |
-| ResNet50-FPN    | Faster R-CNN    |   1333x800  |   1x        |      ----     |  44.2   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/faster_rcnn_r50_fpn_2x_1333x800_mot17half.pdparams)  | [config](./faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml) |
+| CSPResNet       | PPYOLOe         |   640x640   |   36e       |      ----     |  52.9   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyoloe_crn_l_36e_640x640_mot17half.pdparams)     | [config](./ppyoloe_crn_l_36e_640x640_mot17half.yml)    |
-| DarkNet-53      | YOLOv3          |   608X608   |   270e      |      ----     |  45.4   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_270e_608x608_pedestrian.pdparams)  | [config](./yolov3_darknet53_270e_608x608_pedestrian.yml) |
-| ESNet           | PicoDet         |    896x896  |   300e      |      ----     |  40.9   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/picodet_l_esnet_300e_896x896_mot17half.pdparams)     | [config](./picodet_l_esnet_300e_896x896_mot17half.yml)    |
 **Notes:**
-  - The above model except for YOLOv3 is trained with **MOT17-half train** set.
+  - The above models are trained with **MOT17-half train** set, it can be downloaded from this [link](https://dataset.bj.bcebos.com/mot/MOT17.zip).
  - **MOT17-half train** set is a dataset composed of pictures and labels of the first half frame of each video in MOT17 Train dataset (7 sequences in total). **MOT17-half val set** is used for evaluation, which is composed of the second half frame of each video. They can be downloaded from this [link](https://paddledet.bj.bcebos.com/data/mot/mot17half/annotations.zip). Download and unzip it in the `dataset/mot/MOT17/images/`folder.
  - YOLOv3 is trained with the same pedestrian dataset as `configs/pedestrian/pedestrian_yolov3_darknet.yml`, which is not open yet.
  - For pedestrian tracking, please use pedestrian detector combined with pedestrian ReID model. For vehicle tracking, please use vehicle detector combined with vehicle ReID model.
@@ -25,11 +24,11 @@ English | [简体中文](README_cn.md)
 Start the training and evaluation with the following command
 ```bash
-job_name=ppyolov2_r50vd_dcn_365e_640x640_mot17half
+job_name=ppyoloe_crn_l_36e_640x640_mot17half
 config=configs/mot/deepsort/detector/${job_name}.yml
 log_dir=log_dir/${job_name}
 # 1. training
-python -m paddle.distributed.launch --log_dir=${log_dir} --gpus 0,1,2,3,4,5,6,7 tools/train.py -c ${config}
+python -m paddle.distributed.launch --log_dir=${log_dir} --gpus 0,1,2,3,4,5,6,7 tools/train.py -c ${config} --eval --amp --fleet
 # 2. evaluation
 CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c ${config} -o weights=https://paddledet.bj.bcebos.com/models/mot/deepsort/${job_name}.pdparams
 ```
--- a/configs/mot/deepsort/detector/README_cn.md
+++ b/configs/mot/deepsort/detector/README_cn.md
@@ -10,13 +10,12 @@
 ### 在MOT17-half val数据集上的检测结果
 | 骨架网络         | 网络类型          |   输入尺度   | 学习率策略    |推理时间(fps)   |  Box AP |   下载    | 配置文件 |
 | :-------------- | :-------------  | :--------:  | :---------: | :-----------: | :-----: | :------: | :-----: |
+| DarkNet-53      | YOLOv3          |   608X608   |   40e      |      ----     |  42.7   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_40e_608x608_mot17half.pdparams)  | [配置文件](./yolov3_darknet53_40e_608x608_mot17half.yml) |
 | ResNet50-vd     | PPYOLOv2        |   640x640   |   365e      |      ----     |  46.8   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyolov2_r50vd_dcn_365e_640x640_mot17half.pdparams)  | [配置文件](./ppyolov2_r50vd_dcn_365e_640x640_mot17half.yml) |
-| ResNet50-FPN    | Faster R-CNN    |   1333x800  |   1x        |      ----     |  44.2   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/faster_rcnn_r50_fpn_2x_1333x800_mot17half.pdparams)  | [配置文件](./faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml) |
+| CSPResNet       | PPYOLOe         |   640x640   |   36e       |      ----     |  52.9   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/ppyoloe_crn_l_36e_640x640_mot17half.pdparams)     | [配置文件](./ppyoloe_crn_l_36e_640x640_mot17half.yml)    |
-| DarkNet-53      | YOLOv3          |   608X608   |   270e      |      ----     |  45.4   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/yolov3_darknet53_270e_608x608_pedestrian.pdparams)  | [配置文件](./yolov3_darknet53_270e_608x608_pedestrian.yml) |
-| ESNet           | PicoDet         |   896x896   |   300e      |      ----     |  40.9   | [下载链接](https://paddledet.bj.bcebos.com/models/mot/deepsort/picodet_l_esnet_300e_896x896_mot17half.pdparams)     | [配置文件](./picodet_l_esnet_300e_896x896_mot17half.yml)    |
 **注意:**
-  - 以上模型除了YOLOv3以外均采用**MOT17-half train**数据集训练。
+  - 以上模型均可采用**MOT17-half train**数据集训练，数据集可以从[此链接](https://dataset.bj.bcebos.com/mot/MOT17.zip)下载。
  - **MOT17-half train**是MOT17的train序列(共7个)每个视频的前一半帧的图片和标注组成的数据集，而为了验证精度可以都用**MOT17-half val**数据集去评估，它是每个视频的后一半帧组成的，数据集可以从[此链接](https://paddledet.bj.bcebos.com/data/mot/mot17half/annotations.zip)下载，并解压放在`dataset/mot/MOT17/images/`文件夹下。
  - YOLOv3和`configs/pedestrian/pedestrian_yolov3_darknet.yml`是相同的pedestrian数据集训练的，此数据集暂未开放。
  - 行人跟踪请使用行人检测器结合行人ReID模型。车辆跟踪请使用车辆检测器结合车辆ReID模型。
@@ -31,7 +30,7 @@ job_name=ppyolov2_r50vd_dcn_365e_640x640_mot17half
 config=configs/mot/deepsort/detector/${job_name}.yml
 log_dir=log_dir/${job_name}
 # 1. training
-python -m paddle.distributed.launch --log_dir=${log_dir} --gpus 0,1,2,3,4,5,6,7 tools/train.py -c ${config}
+python -m paddle.distributed.launch --log_dir=${log_dir} --gpus 0,1,2,3,4,5,6,7 tools/train.py -c ${config} --eval --amp --fleet
 # 2. evaluation
 CUDA_VISIBLE_DEVICES=0 python tools/eval.py -c ${config} -o weights=https://paddledet.bj.bcebos.com/models/mot/deepsort/${job_name}.pdparams
 ```
--- a/configs/mot/deepsort/detector/faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml
+++ b/configs/mot/deepsort/detector/faster_rcnn_r50_fpn_2x_1333x800_mot17half.yml
-_BASE_: [
-  '../../../faster_rcnn/faster_rcnn_r50_fpn_2x_coco.yml',
-]
-weights: output/faster_rcnn_r50_fpn_2x_1333x800_mot17half/model_final
-num_classes: 1
-TrainDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/train_half.json
-    image_dir: train
-    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
-EvalDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/val_half.json
-    image_dir: train
-# detector configuration
-architecture: FasterRCNN
-pretrain_weights: https://paddledet.bj.bcebos.com/models/pretrained/ResNet50_cos_pretrained.pdparams
-FasterRCNN:
-  backbone: ResNet
-  neck: FPN
-  rpn_head: RPNHead
-  bbox_head: BBoxHead
-  bbox_post_process: BBoxPostProcess
-ResNet:
-  depth: 50
-  norm_type: bn
-  freeze_at: 0
-  return_idx: [0,1,2,3]
-  num_stages: 4
-FPN:
-  out_channel: 256
-RPNHead:
-  anchor_generator:
-    aspect_ratios: [0.5, 1.0, 2.0]
-    anchor_sizes: [[32], [64], [128], [256], [512]]
-    strides: [4, 8, 16, 32, 64]
-  rpn_target_assign:
-    batch_size_per_im: 256
-    fg_fraction: 0.5
-    negative_overlap: 0.3
-    positive_overlap: 0.7
-    use_random: True
-  train_proposal:
-    min_size: 0.0
-    nms_thresh: 0.7
-    pre_nms_top_n: 2000
-    post_nms_top_n: 1000
-    topk_after_collect: True
-  test_proposal:
-    min_size: 0.0
-    nms_thresh: 0.7
-    pre_nms_top_n: 1000
-    post_nms_top_n: 1000
-BBoxHead:
-  head: TwoFCHead
-  roi_extractor:
-    resolution: 7
-    sampling_ratio: 0
-    aligned: True
-  bbox_assigner: BBoxAssigner
-BBoxAssigner:
-  batch_size_per_im: 512
-  bg_thresh: 0.5
-  fg_thresh: 0.5
-  fg_fraction: 0.25
-  use_random: True
-TwoFCHead:
-  out_channel: 1024
-BBoxPostProcess:
-  decode: RCNNBox
-  nms:
-    name: MultiClassNMS
-    keep_top_k: 100
-    score_threshold: 0.05
-    nms_threshold: 0.5
--- a/configs/mot/deepsort/detector/picodet_l_esnet_300e_896x896_mot17half.yml
+++ b/configs/mot/deepsort/detector/picodet_l_esnet_300e_896x896_mot17half.yml
-_BASE_: [
-  '../../../picodet/picodet_l_640_coco.yml',
-]
-weights: output/picodet_l_esnet_300e_896x896_mot17half/model_final
-num_classes: 1
-TrainDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/train_half.json
-    image_dir: train
-    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
-EvalDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/val_half.json
-    image_dir: train
-worker_num: 6
-TrainReader:
-  sample_transforms:
-  - Decode: {}
-  - RandomCrop: {}
-  - RandomFlip: {prob: 0.5}
-  - RandomDistort: {}
-  batch_transforms:
-  - BatchRandomResize: {target_size: [832, 864, 896, 928, 960], random_size: True, random_interp: True, keep_ratio: False}
-  - NormalizeImage: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - Permute: {}
-  batch_size: 32
-  shuffle: true
-  drop_last: true
-  collate_batch: false
-EvalReader:
-  sample_transforms:
-  - Decode: {}
-  - Resize: {interp: 2, target_size: [896, 896], keep_ratio: False}
-  - NormalizeImage: {is_scale: true, mean: [0.485,0.456,0.406], std: [0.229, 0.224,0.225]}
-  - Permute: {}
-  batch_transforms:
-  - PadBatch: {pad_to_stride: 32}
-  batch_size: 8
-  shuffle: false
-# detector configuration
-architecture: PicoDet
-pretrain_weights: https://paddledet.bj.bcebos.com/models/pretrained/ESNet_x1_25_pretrained.pdparams
-find_unused_parameters: True
-use_ema: true
-cycle_epoch: 40
-snapshot_epoch: 10
-epoch: 250
-PicoDet:
-  backbone: ESNet
-  neck: CSPPAN
-  head: PicoHead
-ESNet:
-  scale: 1.25
-  feature_maps: [4, 11, 14]
-  act: hard_swish
-  channel_ratio: [0.875, 0.5, 1.0, 0.625, 0.5, 0.75, 0.625, 0.625, 0.5, 0.625, 1.0, 0.625, 0.75]
-CSPPAN:
-  out_channels: 128
-  use_depthwise: True
-  num_csp_blocks: 1
-  num_features: 4
-PicoHead:
-  conv_feat:
-    name: PicoFeat
-    feat_in: 128
-    feat_out: 128
-    num_convs: 4
-    num_fpn_stride: 4
-    norm_type: bn
-    share_cls_reg: False
-  fpn_stride: [8, 16, 32, 64]
-  feat_in_chan: 128
-  prior_prob: 0.01
-  reg_max: 7
-  cell_offset: 0.5
-  loss_class:
-    name: VarifocalLoss
-    use_sigmoid: True
-    iou_weighted: True
-    loss_weight: 1.0
-  loss_dfl:
-    name: DistributionFocalLoss
-    loss_weight: 0.25
-  loss_bbox:
-    name: GIoULoss
-    loss_weight: 2.0
-  assigner:
-    name: SimOTAAssigner
-    candidate_topk: 10
-    iou_weight: 6
-  nms:
-    name: MultiClassNMS
-    nms_top_k: 1000
-    keep_top_k: 100
-    score_threshold: 0.025
-    nms_threshold: 0.6
--- a/configs/mot/deepsort/detector/ppyoloe_crn_l_36e_640x640_mot17half.yml
+++ b/configs/mot/deepsort/detector/ppyoloe_crn_l_36e_640x640_mot17half.yml
+_BASE_: [
+  '../../../ppyoloe/ppyoloe_crn_l_300e_coco.yml',
+  '../_base_/mot17.yml',
+]
+weights: output/ppyoloe_crn_l_36e_640x640_mot17half/model_final
+log_iter: 20
+snapshot_epoch: 2
+# schedule configuration for fine-tuning
+epoch: 36
+LearningRate:
+  base_lr: 0.001
+  schedulers:
+    - !CosineDecay
+      max_epochs: 43
+    - !LinearWarmup
+      start_factor: 0.001
+      steps: 100
+OptimizerBuilder:
+  optimizer:
+    momentum: 0.9
+    type: Momentum
+  regularizer:
+    factor: 0.0005
+    type: L2
+TrainReader:
+  batch_size: 8
+# detector configuration
+architecture: YOLOv3
+norm_type: sync_bn
+use_ema: true
+ema_decay: 0.9998
+pretrain_weights: https://bj.bcebos.com/v1/paddledet/models/ppyoloe_crn_l_300e_coco.pdparams
+depth_mult: 1.0
+width_mult: 1.0
+YOLOv3:
+  backbone: CSPResNet
+  neck: CustomCSPPAN
+  yolo_head: PPYOLOEHead
+  post_process: ~
+CSPResNet:
+  layers: [3, 6, 6, 3]
+  channels: [64, 128, 256, 512, 1024]
+  return_idx: [1, 2, 3]
+  use_large_stem: True
+CustomCSPPAN:
+  out_channels: [768, 384, 192]
+  stage_num: 1
+  block_num: 3
+  act: 'swish'
+  spp: true
+PPYOLOEHead:
+  fpn_strides: [32, 16, 8]
+  grid_cell_scale: 5.0
+  grid_cell_offset: 0.5
+  static_assigner_epoch: -1 # 100
+  use_varifocal_loss: True
+  eval_input_size: [640, 640]
+  loss_weight: {class: 1.0, iou: 2.5, dfl: 0.5}
+  static_assigner:
+    name: ATSSAssigner
+    topk: 9
+  assigner:
+    name: TaskAlignedAssigner
+    topk: 13
+    alpha: 1.0
+    beta: 6.0
+  nms:
+    name: MultiClassNMS
+    nms_top_k: 1000
+    keep_top_k: 100
+    score_threshold: 0.01
+    nms_threshold: 0.6
--- a/configs/mot/deepsort/detector/ppyolov2_r50vd_dcn_365e_640x640_mot17half.yml
+++ b/configs/mot/deepsort/detector/ppyolov2_r50vd_dcn_365e_640x640_mot17half.yml
 _BASE_: [
  '../../../ppyolo/ppyolov2_r50vd_dcn_365e_coco.yml',
+  '../_base_/mot17.yml',
 ]
 weights: output/ppyolov2_r50vd_dcn_365e_640x640_mot17half/model_final
+log_iter: 20
-num_classes: 1
+snapshot_epoch: 2
-TrainDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/train_half.json
-    image_dir: train
-    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
-EvalDataset:
-  !COCODataSet
-    dataset_dir: dataset/mot/MOT17/images
-    anno_path: annotations/val_half.json
-    image_dir: train
 # detector configuration

--- a/configs/mot/deepsort/detector/yolov3_darknet53_270e_608x608_pedestrian.yml
+++ b/configs/mot/deepsort/detector/yolov3_darknet53_270e_608x608_pedestrian.yml
-# This config is the same as '../../../pedestrian/pedestrian_yolov3_darknet.yml'.
 _BASE_: [
  '../../../yolov3/yolov3_darknet53_270e_coco.yml',
+  '../_base_/mot17.yml',
 ]
-weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/pedestrian_yolov3_darknet.pdparams
+weights: output/yolov3_darknet53_40e_608x608_mot17half/model_final
-num_classes: 1
+log_iter: 20
+snapshot_epoch: 2
-# This pedestrian training dataset used is not open temporarily.
+# schedule configuration for fine-tuning
-# Only the trained yolov3 model is provided, but you can eval on MOT17 half val dataset.
+epoch: 40
-TrainDataset:
+LearningRate:
-  !COCODataSet
+  base_lr: 0.0001
-    dataset_dir: dataset/pedestrian
+  schedulers:
-    anno_path: annotations/instances_train2017.json
+  - !PiecewiseDecay
-    image_dir: train2017
+    gamma: 0.1
-    data_fields: ['image', 'gt_bbox', 'gt_class', 'is_crowd']
+    milestones:
+    - 32
+    - 36
+  - !LinearWarmup
+    start_factor: 0.3333333333333333
+    steps: 100
-EvalDataset:
+OptimizerBuilder:
-  !COCODataSet
+  optimizer:
-    dataset_dir: dataset/mot/MOT17/images
+    momentum: 0.9
-    anno_path: annotations/val_half.json
+    type: Momentum
-    image_dir: train
+  regularizer:
+    factor: 0.0005
+    type: L2
+TrainReader:
+  batch_size: 8
+  mixup_epoch: 35
 # detector configuration
 architecture: YOLOv3
-pretrain_weights: https://paddledet.bj.bcebos.com/models/pretrained/DarkNet53_pretrained.pdparams
+pretrain_weights: https://bj.bcebos.com/v1/paddledet/models/yolov3_darknet53_270e_coco.pdparams
 norm_type: sync_bn
 YOLOv3:

--- a/configs/mot/deepsort/reid/README.md
+++ b/configs/mot/deepsort/reid/README.md
@@ -9,7 +9,7 @@ English | [简体中文](README_cn.md)
 ### Results on Market1501 pedestrian ReID dataset
-| Backbone        | Model                   |   Params   |   FPS     |    mAP    |   Top1    |   Top5    | download  |  config   |
+| Backbone        | Model                   |   Params  |   FPS     |    mAP    |   Top1    |   Top5    | download  |  config   |
 | :-------------: |  :-----------------:    | :-------: |  :------: | :-------: | :-------: | :-------: | :-------: | :-------: |
 | ResNet-101      |  PCB Pyramid Embedding  |  289M     |   ---     |   86.31   |   94.95   |   98.28   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pcb_pyramid_r101.pdparams)   |   [config](./deepsort_pcb_pyramid_r101.yml)     |
 | PPLCNet-2.5x    |  PPLCNet Embedding      |  36M      |   ---     |   71.59   |   87.38   |   95.49   | [download](https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pplcnet.pdparams)   |   [config](./deepsort_pplcnet.yml)     |

--- a/configs/mot/deepsort/reid/deepsort_pcb_pyramid_r101.yml
+++ b/configs/mot/deepsort/reid/deepsort_pcb_pyramid_r101.yml
@@ -15,7 +15,7 @@ EvalMOTDataset:
    keep_ori_im: True # set as True in DeepSORT
 det_weights: None
-reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort_pcb_pyramid_r101.pdparams
+reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_pcb_pyramid_r101.pdparams
 # A ReID only configuration of DeepSORT, detector should be None.
@@ -28,6 +28,7 @@ DeepSORT:
  tracker: DeepSORTTracker
 PCBPyramid:
+  model_name: "ResNet101"
  num_conv_out_channels: 128
  num_classes: 751 # default 751 classes in Market-1501 dataset.

--- a/configs/mot/deepsort/reid/deepsort_resnet.yml
+++ b/configs/mot/deepsort/reid/deepsort_resnet.yml
+# This config represents a ReID only configuration of DeepSORT, it has two uses.
+# One is used for loading the detection results and ReID model to get tracking results;
+# Another is used for exporting the ReID model to deploy infer.
+_BASE_: [
+  '../../../datasets/mot.yml',
+  '../../../runtime.yml',
+  '../_base_/deepsort_reader_1088x608.yml',
+]
+EvalMOTDataset:
+  !MOTImageFolder
+    dataset_dir: dataset/mot
+    data_root: MOT16/images/train
+    keep_ori_im: True # set as True in DeepSORT
+det_weights: None
+reid_weights: https://paddledet.bj.bcebos.com/models/mot/deepsort/deepsort_resnet.pdparams
+# A ReID only configuration of DeepSORT, detector should be None.
+architecture: DeepSORT
+pretrain_weights: None
+DeepSORT:
+  detector: None
+  reid: ResNetEmbedding
+  tracker: DeepSORTTracker
+ResNetEmbedding:
+  model_name: "ResNet50"
+DeepSORTTracker:
+  input_size: [64, 192]
+  min_box_area: 0 # filter out too small boxes
+  vertical_ratio: -1 # filter out bboxes, usuallly set 1.6 for pedestrian
+  budget: 100
+  max_age: 70
+  n_init: 3
+  metric_type: cosine
+  matching_threshold: 0.2
+  max_iou_distance: 0.9
+  motion: KalmanFilter
--- a/ppdet/engine/tracker.py
+++ b/ppdet/engine/tracker.py
@@ -241,7 +241,7 @@ class Tracker(object):
                outs['bbox'] = outs['bbox'].numpy()
                outs['bbox_num'] = outs['bbox_num'].numpy()
-                if outs['bbox_num'] > 0 and empty_detections == False:
+                if len(outs['bbox']) > 0 and empty_detections == False:
                    # detector outputs: pred_cls_ids, pred_scores, pred_bboxes
                    pred_cls_ids = outs['bbox'][:, 0:1]
                    pred_scores = outs['bbox'][:, 1:2]

--- a/ppdet/modeling/reid/__init__.py
+++ b/ppdet/modeling/reid/__init__.py
@@ -17,9 +17,11 @@ from . import fairmot_embedding_head
 from . import resnet
 from . import pyramidal_embedding
 from . import pplcnet_embedding
+from . import resnet_embedding
 from .fairmot_embedding_head import *
 from .jde_embedding_head import *
 from .resnet import *
 from .pyramidal_embedding import *
 from .pplcnet_embedding import *
+from .resnet_embedding import *
--- a/ppdet/modeling/reid/pyramidal_embedding.py
+++ b/ppdet/modeling/reid/pyramidal_embedding.py
@@ -21,7 +21,7 @@ import paddle.nn as nn
 import paddle.nn.functional as F
 from paddle.nn.initializer import Normal, Constant
 from paddle import ParamAttr
-from .resnet import *
+from .resnet import ResNet50, ResNet101
 from ppdet.core.workspace import register
 __all__ = ['PCBPyramid']
@@ -46,6 +46,7 @@ class PCBPyramid(nn.Layer):
    def __init__(self,
                 input_ch=2048,
+                 model_name='ResNet101',
                 num_stripes=6,
                 used_levels=(1, 1, 1, 1, 1, 1),
                 num_classes=751,
@@ -60,7 +61,8 @@ class PCBPyramid(nn.Layer):
        self.num_in_each_level = [i for i in range(self.num_stripes, 0, -1)]
        self.num_branches = sum(self.num_in_each_level)
-        self.base = ResNet101(
+        assert model_name in ['ResNet50', 'ResNet101'], "Unsupported ReID arch: {}".format(model_name)
+        self.base = eval(model_name)(
            lr_mult=0.1,
            last_conv_stride=last_conv_stride,
            last_conv_dilation=last_conv_dilation)

--- a/ppdet/modeling/reid/resnet_embedding.py
+++ b/ppdet/modeling/reid/resnet_embedding.py
+# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. 
+#   
+# Licensed under the Apache License, Version 2.0 (the "License");   
+# you may not use this file except in compliance with the License.  
+# You may obtain a copy of the License at   
+#   
+#     http://www.apache.org/licenses/LICENSE-2.0    
+#   
+# Unless required by applicable law or agreed to in writing, software   
+# distributed under the License is distributed on an "AS IS" BASIS, 
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  
+# See the License for the specific language governing permissions and   
+# limitations under the License.
+import os
+import paddle
+import paddle.nn.functional as F
+from paddle import nn
+from .resnet import ResNet50, ResNet101
+from ppdet.core.workspace import register
+__all__ = ['ResNetEmbedding']
+@register
+class ResNetEmbedding(nn.Layer):
+    in_planes = 2048
+    def __init__(self, model_name='ResNet50', last_stride=1):
+        super(ResNetEmbedding, self).__init__()
+        assert model_name in ['ResNet50', 'ResNet101'], "Unsupported ReID arch: {}".format(model_name)
+        self.base = eval(model_name)(last_conv_stride=last_stride)
+        self.gap = nn.AdaptiveAvgPool2D(output_size=1)
+        self.flatten = nn.Flatten(start_axis=1, stop_axis=-1)
+        self.bn = nn.BatchNorm1D(self.in_planes, bias_attr=False)
+    def forward(self, x):
+        base_out = self.base(x)
+        global_feat = self.gap(base_out)
+        global_feat = self.flatten(global_feat)
+        global_feat = self.bn(global_feat)
+        return global_feat