utils.py 文件源码

def accumulated_histogram(image, histogram):
    hist = list(map(lambda x: cv2.calcHist([image], 
                                    [x], 
                                    None, 
                                    [256], 
                                    [0, 256]), 
                    range(3)))
    for x in range(3):
        histogram[x] = np.add(hist[x].ravel(), histogram[x].ravel())                                
    return histogram