在Python中比较(相等或不相等)2个.png图像[复制]

import cv2

def compare_images(img1_path, img2_path):
    # 加载图像
    img1 = cv2.imread(img1_path)
    img2 = cv2.imread(img2_path)
    
    if img1 is None or img2 is None:
        return False, "图像加载失败"
    
    # 比较图像
    if img1.shape == img2.shape:
        difference = cv2.subtract(img1, img2)
        b, g, r = cv2.split(difference)
        
        # 检查差异图像的每个通道是否有非零值
        if cv2.countNonZero(b) == 0 and cv2.countNonZero(g) == 0 and cv2.countNonZero(r) == 0:
            return True, "图像相等"
        else:
            return False, "图像不相等"
    else:
        return False, "图像尺寸不同"

# 示例调用
result, message = compare_images('path_to_image1.png', 'path_to_image2.png')
print(message)