opencv-python图像通道转换（三通道至单通道）_python批量三通道mask图像转成单通道

通道转换

方法一

import os
import cv2
path = r' ..... '  # 图像所在路径
filelist = os.listdir(path)
print(len(filelist))
for file in filelist:
    orgin_dir = os.path.join(path, file) # 原路径
    print(orgin_dir)  # 检查路径
    img = cv2.imread(orgin_dir, cv2.IMREAD_GRAYSCALE)  # 读取灰度图
    print(img.shape)  # 打印维度
    cv2.imwrite(orgin_dir, img)  # 覆盖原图
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方法二

import cv2
import glob
filename = glob.glob(r'C:\Users\*.png')
for i in filename:
    img = cv2.imread('{}'.format(i), cv2.IMREAD_GRAYSCALE)
    print(i)
    cv2.imwrite(r'{}'.format(i), img)
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转换对比