philipperemy/python-darknet-yolo-v4

Python to interface with Darknet Yolo V4 (multi GPU with load balancer supported).

YOLOv4 in Python

Python interface to Darknet Yolo V4. The multi GPU is supported (load balancer).

Installation

Compile the Darknet framework first.

sudo apt-get update 
sudo apt-get install -y pkg-config git build-essential libopencv-dev wget cmake
git clone https://github.com/AlexeyAB/darknet.git
cd darknet
make LIBSO=1 OPENCV=1 GPU=1 AVX=1 OPENMP=1 CUDNN=1 CUDNN_HALF=1 OPENMP=1 -j $(nproc)
chmod +x darknet

Then, download the weights by following the instructions here: https://github.com/AlexeyAB/darknet.

From there, create a virtual environment with python3.6+ and run this command:

pip install yolo-v4

Run inference on images

To run inference on the GPU on an image data/dog.jpg, run this script:

import numpy as np
from PIL import Image

from yolov4 import Detector

img = Image.open('data/dog.jpg')
d = Detector(gpu_id=0)
img_arr = np.array(img.resize((d.network_width(), d.network_height())))
detections = d.perform_detect(image_path_or_buf=img_arr, show_image=False)
for detection in detections:
    box = detection.left_x, detection.top_y, detection.width, detection.height
    print(f'{detection.class_name.ljust(10)} | {detection.class_confidence * 100:.1f} % | {box}')

dog          | 97.6 % | (100, 236, 147, 334)
truck        | 93.0 % | (367, 81, 175, 98)
bicycle      | 92.0 % | (90, 134, 362, 315)
pottedplant  | 34.1 % | (538, 115, 29, 47)