用于多处理的 Python OpenCV 加速

Question

我正在尝试在来自网络摄像头的实时提要上运行我的图像处理算法。我希望它在多处理模块的并行进程中运行，我该如何实现？这是我当前没有并行编码的代码：from cv2 import VideoCapture , imshow , waitKey ,imwriteimport numpy as npfrom time import timedef greenify (x):    return some_valueskip = 4video = VideoCapture(0)video.set(3,640/skip)video.set(4,480/skip)total = 0top_N = 100while True:    image = video.read()[1]            if waitKey(1) == 27:        break    arr = array([list(map(greenify,j)) for j in image])    result = unravel_index(argpartition(arr,arr.size-top_N,axis=None)[-top_N:], arr.shape)    centre = skip*np.median(result[0]) , skip*np.median(result[1])    imshow('Feed', image)print('Time taken:',total)video.release()