# Yolov5-Face
本文记录了复现[yolov5-face](https://github.com/deepcam-cn/yolov5-face)过程。
## 数据集准备
1. 下载数据集[Widerface images](http://shuoyang1213.me/WIDERFACE/),[数据集annotations](https://drive.google.com/file/d/1tU_IjyOwGQfGNUvZGwWWM4SwxKp2PUQ8/view?usp=sharing);
2. 在当前目录新建 original/文件夹,并将下载内容解压到original文件夹中的指定位置,文件夹格式如图所示:
```shell
|---original
| |---WIDER_train
| | |---images
| | | |---0-Parade
| | | | |---0_Parade_marchingband_1_5.jpg
| | | | |---0_Parade_marchingband_1_6.jpg
| | | | |---0_Parade_marchingband_1_6.jpg
| | | |---1-Handshaking
| | | | |---1_Handshaking_Handshaking_1_42.jpg
| | | | |---1_Handshaking_Handshaking_1_46.jpg
| | | | |---1_Handshaking_Handshaking_1_59.jpg
| | |--- label.txt
| |---WIDER_val
| | |---images
| | | |---0-Parade
| | | | |---0_Parade_marchingband_1_20.jpg
| | | | |---0_Parade_marchingband_1_74.jpg
| | | | |---0_Parade_marchingband_1_78.jpg
| | | |---1-Handshaking
| | | | |---1_Handshaking_Handshaking_1_35.jpg
| | | | |---1_Handshaking_Handshaking_1_94.jpg
| | | | |---1_Handshaking_Handshaking_1_107.jpg
| | |--- label.txt
```
```bash
cd YOLOV5-Face
mkdir original
cd ~/Downloads
unzip -d /the/path/of/YOLOV5-Face/original WIDER_train.zip
unzip -d /the/path/of/YOLOV5-Face/original WIDER_val.zip
cd ~/Downloads
unzip -d /the/path/of/YOLOV5-Face/original retinaface_gt_v1.1.zip
cd /the/path/of/YOLOV5-Face/original
mv train/label.txt WIDER_train
mv val/label.txt WIDER_val
rm -rf train/ val/ test/
```
3. 数据集格式转化
*
```bash
cd data
python prepare_dataset.py
```
* 数据集格式和Darknet Yolo相同,每张图片对应一个.txt标签。标签格式参考Darknet Yolo的数据集标签格式: "category cx, cy, w, h, x1,y1, x2, y2, x3, y3, x4, y4, x5, y5"。其中,category为下标类别(这里设为0), cx,cy为归一化的标签框中心点坐标, w,h为归一化标签框的宽高, x{1,2,3,4,5}/y{1,2,3,4,5}是指归一化的关键点坐标,.txt标签文件内容示例如下:
```shell
0 0.50146484375 0.2964860907759883 0.0361328125 0.0746705710102489 0.4964423828125 0.2896354319180088 0.51370703125 0.2896354319180088 0.50680078125 0.2981068814055637 0.4986396484375 0.31363689604685213 0.51370703125 0.31269546120058567
0 0.4150390625 0.3323572474377745 0.037109375 0.07027818448023426 -0.0009765625 -0.0014641288433382138 -0.0009765625 -0.0014641288433382138 -0.0009765625 -0.0014641288433382138 -0.0009765625 -0.0014641288433382138 -0.0009765625 -0.0014641288433382138
```
* 图片与其对应的标签文件同名,存放在同一个目录下。数据文件结构如下:
```bash
|---train
| |---0_Parade_marchingband_1_5.jpg
| |---0_Parade_marchingband_1_5.txt
| |---0_Parade_marchingband_1_6.jpg
| |---0_Parade_marchingband_1_6.txt
| |---0_Parade_marchingband_1_8.jpg
| |---0_Parade_marchingband_1_8.txt
|---val
| |---0_Parade_marchingband_1_20.jpg
| |---0_Parade_marchingband_1_20.txt
| |---0_Parade_marchingband_1_74.jpg
| |---0_Parade_marchingband_1_74.txt
```
* 注意下载的原始数据集格式是: "x1, y1, w, h"。其中, x1,y1是标签框左上角坐标, w,h是标签框的宽高,可通过代码验证:
```bash
cd data
python val_label_format.py
```
* 红色框:假设标签格式:x1 y1 x2 y2
* 绿色框:假设标签格式:center_x center_y w h
* 蓝色框:假设标签格式:x1, y1, w,h(原始数据集格式)
![](tut_images/label_format.png)
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在当前目录新建 original/文件夹,并将下载内容解压到originalfolder中的指定位置,文件夹格式如图所示: |---original | |---WIDER_train | | |---images | | | |---0-Parade | | | | |---0_Parade_marchingband_1_5.jpg | | | | |---0_Parade_marchingband_1_6.jpg | | | | |---0_Parade_marchingband_1_6.jpg | | | |---1-Handshaking | | | | |---1_Handshaking_Handshaking_1_42.jpg | | | | |---1_Handshaking_Handshaking_1_46.jpg | | | | |---1_Handshaking_Handshaking_1_59.jpg | | |--- la
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