Yolo-FastestV2

Based on Yolo's low-power, ultra-lightweight universal target detection algorithm, the parameter is only 250k, and the speed of the smart phone mobile terminal can reach ~300fps+

  • Simple, fast, compact, easy to transplant
  • Less resource occupation, excellent single-core performance, lower power consumption
  • Faster and smaller:Trade 1% loss of accuracy for 40% 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 7 minutes

Evaluating indicator/Benchmark

Network COCO mAP(0.5) Resolution Run Time(4xCore) Run Time(1xCore) FLOPs(G) Params(M)
Yolo-FastestV2 23.56 % 352X352 3.23 ms 4.5 ms 0.238 0.25M
Yolo-FastestV1.1 24.40 % 320X320 5.59 ms 7.52 ms 0.252 0.35M
Yolov4-Tiny 40.2% 416X416 23.67ms 40.14ms 6.9 5.77M
  • Test platform Mi 11 Snapdragon 888 CPU，Based on NCNN
  • Reasons for the increase in inference speed: optimization of model memory access
  • Suitable for hardware with extremely tight computing resources

How to use

Dependent installation

  • PIP
pip3 install -r requirements.txt

Test

  • Picture test
    python3 test.py --data data/coco.data --weights modelzoo/coco2017-epoch-0.235624ap-model.pth --img img/dog.jpg

image

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:

    .
├── train
│   ├── 000001.jpg
│   ├── 000001.txt
│   ├── 000002.jpg
│   ├── 000002.txt
│   ├── 000003.jpg
│   └── 000003.txt
└── val
    ├── 000043.jpg
    ├── 000043.txt
    ├── 000057.jpg
    ├── 000057.txt
    ├── 000070.jpg
    └── 000070.txt

  • Generate a dataset path .txt file, the example content is as follows：

    train.txt

    /home/qiuqiu/Desktop/dataset/train/000001.jpg
/home/qiuqiu/Desktop/dataset/train/000002.jpg
/home/qiuqiu/Desktop/dataset/train/000003.jpg

    val.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:

    .
├── category.names        # .names category label file
├── train                 # train dataset
│   ├── 000001.jpg
│   ├── 000001.txt
│   ├── 000002.jpg
│   ├── 000002.txt
│   ├── 000003.jpg
│   └── 000003.txt
├── train.txt              # train dataset path .txt file
├── val                    # val dataset
│   ├── 000043.jpg
│   ├── 000043.txt
│   ├── 000057.jpg
│   ├── 000057.txt
│   ├── 000070.jpg
│   └── 000070.txt
└── 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-epoch-0.235624ap-model.pth

GitHub

https://github.com/dog-qiuqiu/Yolo-FastestV2