# Installing PaddleDetection

---
## Table of Contents

- [Introduction](#introduction)
- [PaddlePaddle](#paddlepaddle)
- [Other Dependencies](#other-dependencies)
- [PaddleDetection](#paddle-detection)
- [Datasets](#datasets)


## Introduction

This document covers how to install PaddleDetection, its dependencies (including PaddlePaddle), and COCO and PASCAL VOC dataset.

For general information about PaddleDetection, please see [README.md](../README.md).


## PaddlePaddle

Running PaddleDetection requires PaddelPaddle Fluid v.1.5 and later. please follow the installation instructions in [installation document](http://www.paddlepaddle.org/documentation/docs/en/1.4/beginners_guide/install/index_en.html).

Please make sure your PaddlePaddle installation was sucessful and the version of your PaddlePaddle is not lower than the version required. You can check PaddlePaddle installation with following commands.

```
# To check if PaddlePaddle installation was sucessful
python -c "from paddle.fluid import fluid; fluid.install_check.run_check()"

# To print PaddlePaddle version
python -c "import paddle; print(paddle.__version__)"
```

### Requirements:

- Python2 or Python3
- CUDA >= 8.0
- cuDNN >= 7.0
- nccl >= 2.1.2


## Other Dependencies

**Install the [COCO-API](https://github.com/cocodataset/cocoapi):**

To train the model, COCO-API is needed. Installation is as follows:

    git clone https://github.com/cocodataset/cocoapi.git
    cd cocoapi/PythonAPI
    # if cython is not installed
    pip install Cython
    # Install into global site-packages
    make install
    # Alternatively, if you do not have permissions or prefer
    # not to install the COCO API into global site-packages
    python setup.py install --user


## PaddleDetection

**Clone Paddle models repository:**

You can clone Paddle models and change directory to PaddleDetection module with folloing commands:

```
cd <path/to/clone/models>
git clone https://github.com/PaddlePaddle/models
cd models/PaddleCV/object_detection
```

**Install python module requirements:**

Other python module requirements is set in [requirements.txt](./requirements.txt), you can install these requirements with folloing command:

```
pip install -r requirements.txt
```

**Check PaddleDetection architectures tests pass:**

```
export PYTHONPATH=$PYTHONPATH:.
python ppdet/modeling/tests/test_architectures.py
```


## Datasets

PaddleDetection support train/eval/infer models with dataset [MSCOCO](http://cocodataset.org) and [PASCAL VOC](http://host.robots.ox.ac.uk/pascal/VOC/), you can set up dataset as follows.

**Create symlinks for datasets:**

Dataset default path in PaddleDetection config files is `data/coco` and `data/voc`, you can set symlinks for your COCO/COCO-like or VOC/VOC-like datasets with following commands:

```
ln -sf <path/to/coco> $PaddleDetection/data/coco
ln -sf <path/to/voc> $PaddleDetection/data/voc
```

If you do not have datasets locally, you can download dataset as follows:

- MSCOCO-2017

```
# download
wget http://images.cocodataset.org/zips/train2017.zip
wget http://images.cocodataset.org/zips/val2017.zip
wget http://images.cocodataset.org/annotations/annotations_trainval2017.zip

# decompress
unzip train2017.zip
unzip val2017.zip
unzip annotations_trainval2017.zip
```

- VOC2012

```
# download
wget http://host.robots.ox.ac.uk/pascal/VOC/voc2012/VOCtrainval_11-May-2012.tar

# decompress
tar -xf VOCtrainval_11-May-2012.tar
```

**Auto download datasets:**

If you set up models while `data/coc` and `data/voc` is not found, PaddleDetection will automaticaly download them from [MSCOCO-2017](http://images.cocodataset.org) and [VOC2012](http://host.robots.ox.ac.uk/pascal/VOC), the decompressed datasets will be places in `~/.cache/paddle/dataset/` and can be discovered automaticaly in the next setting up time.


**NOTE:** For further informations on the datasets, please see [DATASET.md](../ppdet/data/README.md)