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YoloV7 Raspberry Pi 4

output image

YoloV7 with the ncnn framework.

License

Paper: https://arxiv.org/pdf/2207.02696.pdf

Special made for a bare Raspberry Pi 4, see Q-engineering deep learning examples


Benchmark.

Numbers in FPS and reflect only the inference timing. Grabbing frames, post-processing and drawing are not taken into account.

Model size mAP Jetson Nano RPi 4 1950 RPi 5 2900 Rock 5 RK35881
NPU
RK3566/682
NPU
Nano
TensorRT
Orin
TensorRT
NanoDet 320x320 20.6 26.2 13.0 43.2 36.0
NanoDet Plus 416x416 30.4 18.5 5.0 30.0 24.9
PP-PicoDet 320x320 27.0 24.0 7.5 53.7 46.7
YoloFastestV2 352x352 24.1 38.4 18.8 78.5 65.4
YoloV2 20 416x416 19.2 10.1 3.0 24.0 20.0
YoloV3 20 352x352 tiny 16.6 17.7 4.4 18.1 15.0
YoloV4 416x416 tiny 21.7 16.1 3.4 17.5 22.4
YoloV4 608x608 full 45.3 1.3 0.2 1.82 1.5
YoloV5 640x640 nano 22.5 5.0 1.6 13.6 12.5 58.8 14.8 19.0 100
YoloV5 640x640 small 22.5 5.0 1.6 6.3 12.5 37.7 11.7 9.25 100
YoloV6 640x640 nano 35.0 10.5 2.7 15.8 20.8 63.0 18.0
YoloV7 640x640 tiny 38.7 8.5 2.1 14.4 17.9 53.4 16.1 15.0
YoloV8 640x640 nano 37.3 14.5 3.1 20.0 16.3 53.1 18.2
YoloV8 640x640 small 44.9 4.5 1.47 11.0 9.2 28.5 8.9
YoloV9 640x640 comp 53.0 1.2 0.28 1.5 1.2
YoloX 416x416 nano 25.8 22.6 7.0 38.6 28.5
YoloX 416x416 tiny 32.8 11.35 2.8 17.2 18.1
YoloX 640x640 small 40.5 3.65 0.9 4.5 7.5 30.0 10.0

1 The Rock 5 and Orange Pi5 have the RK3588 on board.
2 The Rock 3, Radxa Zero 3 and Orange Pi3B have the RK3566 on board.
20 Recognize 20 objects (VOC) instead of 80 (COCO)


Dependencies.

To run the application, you have to:

  • A Raspberry Pi 4 with a 32 or 64-bit operating system. It can be the Raspberry 64-bit OS, or Ubuntu 18.04 / 20.04. Install 64-bit OS
  • The Tencent ncnn framework installed. Install ncnn
  • OpenCV 64-bit installed. Install OpenCV 4.5
  • Code::Blocks installed. ($ sudo apt-get install codeblocks)

Installing the app.

To extract and run the network in Code::Blocks
$ mkdir MyDir
$ cd MyDir
$ wget https://github.com/Qengineering/YoloV7-ncnn-Raspberry-Pi-4/archive/refs/heads/main.zip
$ unzip -j master.zip
Remove master.zip, LICENSE and README.md as they are no longer needed.
$ rm master.zip
$ rm LICENSE
$ rm README.md

Your MyDir folder must now look like this:
parking.jpg
busstop.jpg
YoloV7.cpb
yolo.cpp
yolo.h
yoloV7main.cpp
yolov7-tiny.bin
yolov7-tiny.param


Running the app.

To run the application load the project file YoloV7.cbp in Code::Blocks. More info or
if you want to connect a camera to the app, follow the instructions at Hands-On.


Dynamic sizes.

YoloV7 can handle different input resolutions without changing the deep learning model.
On line 28 of yolov7main.cpp you can change the target_size (default 640).
Decreasing the size to say 412 will speed up the inference time. On the other hand, the resizing makes the image less detailed; the model will no longer detect all objects.

Many thanks to nihui and Xiang Shin Wuu

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