python-opencv操作像素进行反色处理

超、凢脫俗 2022-03-14 10:48 549阅读 1赞

**主要内容**  
“反色处理”指用色彩值的最高值255减去原先的色彩值。本文利用opencv库对图片进行反色处理

**主要代码**

import cv2 as cv
    
    def access_pixels(image):
        height, width, channels = image.shape
        print("width:%s,height:%s,channels:%s" % (width, height, channels))
        
        for row in range(height):
            for list in range(width):
                for c in range(channels):
                    pv = image[row, list, c]
                    image[row, list, c] = 255 - pv
        cv.imshow("AfterDeal", image)
    
    src1 = cv.imread("yanye.jpg")
    src = cv.resize(src1,(600,450),)
    cv.imshow('OriginalImage', src)
    
    t1 = cv.getTickCount()
    access_pixels(src)
    t2 = cv.getTickCount()
    
    print("time cost:%s s" % ((t2 - t1) / cv.getTickFrequency()))
    cv.waitKey()

**运行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3Mzc0NjQz_size_16_color_FFFFFF_t_70]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3Mzc0NjQz_size_16_color_FFFFFF_t_70 1]  
**参考内容**  
[Python-OpenCV之操作像素进行反色（反相）处理][Python-OpenCV]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3Mzc0NjQz_size_16_color_FFFFFF_t_70]: /images/20220313/8be8f53b259a4f5ca370f2e5584f324d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3Mzc0NjQz_size_16_color_FFFFFF_t_70 1]: /images/20220313/c74dd3a1083d4681b46c7c4a17e3e2fd.png
[Python-OpenCV]: https://blog.csdn.net/li_l_il/article/details/83240813