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  • CV


    一、颜色空间转换

    cvtColor(src, code[, dst[, dstCn]]) -> dst

    • src:原始图像
    • code:转换的代码或者标识
    • 返回值:已完成转换的图像

    lena = cv2.imread('lena.jpg')
    
    lena_gray = cv2.cvtColor('lena.jpg', cv2.COLOR_BAYER_RG2GRAY)
    cv_show(lena_gray)
    

    img.shape # (H, W, C)    
    #  (200, 200, 3)
    

    二、分离 split

    b,g,r = cv2.split(img)
    
    r
    
    array([[223, 222, 223, ..., 235, 232, 202],
           [225, 224, 223, ..., 236, 234, 198],
           [225, 226, 226, ..., 233, 222, 178],
           ...,
           [ 90,  92,  93, ..., 148, 153, 158],
           [ 87,  91,  89, ..., 156, 165, 165],
           [ 82,  94,  92, ..., 159, 172, 177]], dtype=uint8)
    
    cv_show(b)
    cv_show(g)
    cv_show(r)
    
    r.shape
    # (200, 200)
    

    img=cv2.merge((b,g,r))
    img.shape # (200, 200, 3)
    
    # 只保留 R 通道
    
    cur_img = img.copy()
    cur_img[:,:,0] = 0
    cur_img[:,:,1] = 0
    # cv_show('R',cur_img)
    
    cur_img
    '''
    array([[[  0,   0,  91],
            [  0,   0,  91],
            [  0,   0,  91],
    '''
    
    
    array([[[  0,   0,  91],
            [  0,   0,  91],
            [  0,   0,  91],
            ...,
            [  0,   0, 122],
            [  0,   0, 122],
            [  0,   0, 122]],
    
            ...,
            [  0,   0, 120],
            [  0,   0, 121],
            [  0,   0, 121]]], dtype=uint8)
    
    # 只保留 G
    cur_img = img.copy()
    cur_img[:,:,0] = 0
    cur_img[:,:,2] = 0
    
    cv_show('G',cur_img)
    
    # 只保留 B
    cur_img = img.copy()
    cur_img[:,:,1] = 0
    cur_img[:,:,2] = 0
    
    cv_show('B',cur_img)
    

    三、合并 merge

    
    img2 = cv2.merge([b, g, r])
    
    
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  • 原文地址:https://www.cnblogs.com/fldev/p/14371224.html
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