FastestDet: it has higher accuracy and faster speed than Yolo-fastest https://github.com/dog-qiuqiu/FastestDet
โก Yolo-FastestV2โก 
- Simple, fast, compact, easy to transplant
- Less resource occupation, excellent single-core performance, lower power consumption
- Faster and smaller:Trade 0.3% loss of accuracy for 30% increase in inference speed, reducing the amount of parameters by 25%
- Fast training speed, low computing power requirements, training only requires 3GB video memory, gtx1660ti training COCO 1 epoch only takes 4 minutes
- ็ฎๆณไป็ป๏ผhttps://zhuanlan.zhihu.com/p/400474142 ไบคๆตqq็พค:1062122604
Evaluating indicator/Benchmark
| Network | COCO mAP(0.5) | Resolution | Run Time(4xCore) | Run Time(1xCore) | FLOPs(G) | Params(M) |
|---|---|---|---|---|---|---|
| Yolo-FastestV2 | 24.10 % | 352X352 | 3.29 ms | 5.37 ms | 0.212 | 0.25M |
| Yolo-FastestV1.1 | 24.40 % | 320X320 | 4.23 ms | 7.54 ms | 0.252 | 0.35M |
| Yolov4-Tiny | 40.2% | 416X416 | 26.00ms | 55.44ms | 6.9 | 5.77M |
- Test platform Mate 30 Kirin 990 CPU๏ผBased on NCNN
Improvement
- Different loss weights for different scale output layers
- The backbone is replaced with a more lightweight shufflenetV2
- Anchor matching mechanism and loss are replaced by YoloV5, and the classification loss is replaced by softmax cross entropy from sigmoid
- Decouple the detection head, distinguish obj (foreground background classification), cls (category classification), reg (detection frame regression) 3 branches,
How to use
Dependent installation
- PIP
pip3 install -r requirements.txt
Test
- Picture test
python3 test.py --data data/coco.data --weights modelzoo/coco2017-0.241078ap-model.pth --img img/000139.jpg
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How to train
Building data sets(The dataset is constructed in the same way as darknet yolo)
-
The format of the data set is the same as that of Darknet Yolo, Each image corresponds to a .txt label file. The label format is also based on Darknet Yolo's data set label format: "category cx cy wh", where category is the category subscript, cx, cy are the coordinates of the center point of the normalized label box, and w, h are the normalized label box The width and height, .txt label file content example as follows:
11 0.344192634561 0.611 0.416430594901 0.262 14 0.509915014164 0.51 0.974504249292 0.972 -
The image and its corresponding label file have the same name and are stored in the same directory. The data file structure is as follows:
. โโโ train โย ย โโโ 000001.jpg โย ย โโโ 000001.txt โย ย โโโ 000002.jpg โย ย โโโ 000002.txt โย ย โโโ 000003.jpg โย ย โโโ 000003.txt โโโ val โโโ 000043.jpg โโโ 000043.txt โโโ 000057.jpg โโโ 000057.txt โโโ 000070.jpg โโโ 000070.txt -
Generate a dataset path .txt file, the example content is as follows๏ผ
train.txt
/home/qiuqiu/Desktop/dataset/train/000001.jpg /home/qiuqiu/Desktop/dataset/train/000002.jpg /home/qiuqiu/Desktop/dataset/train/000003.jpgval.txt
/home/qiuqiu/Desktop/dataset/val/000070.jpg /home/qiuqiu/Desktop/dataset/val/000043.jpg /home/qiuqiu/Desktop/dataset/val/000057.jpg -
Generate the .names category label file, the sample content is as follows:
category.names
person bicycle car motorbike ... -
The directory structure of the finally constructed training data set is as follows:
. โโโ category.names # .names category label file โโโ train # train dataset โ โโโ 000001.jpg โย ย โโโ 000001.txt โย ย โโโ 000002.jpg โย ย โโโ 000002.txt โย ย โโโ 000003.jpg โย ย โโโ 000003.txt โโโ train.txt # train dataset path .txt file โโโ val # val dataset โย ย โโโ 000043.jpg โย ย โโโ 000043.txt โย ย โโโ 000057.jpg โย ย โโโ 000057.txt โย ย โโโ 000070.jpg โย ย โโโ 000070.txt โโโ val.txt # val dataset path .txt file
Get anchor bias
- Generate anchor based on current dataset
python3 genanchors.py --traintxt ./train.txt - The anchors6.txt file will be generated in the current directory,the sample content of the anchors6.txt is as follows:
12.64,19.39, 37.88,51.48, 55.71,138.31, 126.91,78.23, 131.57,214.55, 279.92,258.87 # anchor bias 0.636158 # iou
Build the training .data configuration file
- Reference./data/coco.data
[name] model_name=coco # model name [train-configure] epochs=300 # train epichs steps=150,250 # Declining learning rate steps batch_size=64 # batch size subdivisions=1 # Same as the subdivisions of the darknet cfg file learning_rate=0.001 # learning rate [model-configure] pre_weights=None # The path to load the model, if it is none, then restart the training classes=80 # Number of detection categories width=352 # The width of the model input image height=352 # The height of the model input image anchor_num=3 # anchor num anchors=12.64,19.39, 37.88,51.48, 55.71,138.31, 126.91,78.23, 131.57,214.55, 279.92,258.87 #anchor bias [data-configure] train=/media/qiuqiu/D/coco/train2017.txt # train dataset path .txt file val=/media/qiuqiu/D/coco/val2017.txt # val dataset path .txt file names=./data/coco.names # .names category label file
Train
- Perform training tasks
python3 train.py --data data/coco.data
Evaluation
- Calculate map evaluation
python3 evaluation.py --data data/coco.data --weights modelzoo/coco2017-0.241078ap-model.pth
Deploy
NCNN
- Convert onnx
python3 pytorch2onnx.py --data data/coco.data --weights modelzoo/coco2017-0.241078ap-model.pth --output yolo-fastestv2.onnx - onnx-sim
python3 -m onnxsim yolo-fastestv2.onnx yolo-fastestv2-opt.onnx - Build NCNN
git clone https://github.com/Tencent/ncnn.git cd ncnn mkdir build cd build cmake .. make make install cp -rf ./ncnn/build/install/* ~/Yolo-FastestV2/sample/ncnn - Covert ncnn param and bin
cd ncnn/build/tools/onnx ./onnx2ncnn yolo-fastestv2-opt.onnx yolo-fastestv2.param yolo-fastestv2.bin cp yolo-fastestv2* ../ cd ../ ./ncnnoptimize yolo-fastestv2.param yolo-fastestv2.bin yolo-fastestv2-opt.param yolo-fastestv2-opt.bin 1 cp yolo-fastestv2-opt* ~/Yolo-FastestV2/sample/ncnn/model - run sample
cd ~/Yolo-FastestV2/sample/ncnn sh build.sh ./demo