直方图均衡化

# 自适应直方图均衡化
def hisEqulColor(img):
    # 将RGB图像转换到YCrCb空间中
    ycrcb = cv.cvtColor(img, cv.COLOR_BGR2YCR_CB)
    channels = cv.split(ycrcb)
    clahe = cv.createCLAHE(clipLimit=1.0, tileGridSize=(7, 7))
    clahe.apply(channels[0], channels[0])
    cv.merge(channels, ycrcb)
    cv.cvtColor(ycrcb, cv.COLOR_YCR_CB2BGR, img)
    return img