BGR and RGB convert each other

stay opencv The image in is represented by bgr Stored in form , But many scenarios default rgb Form of image , This leads to color confusion in practical applications , Here are bgr and rgb Mutual conversion functions ：

def rgb_bgr(r_color):
    r_color_list = list(r_color)
    tmp = r_color_list[0]
    r_color_list[0] = r_color_list[2]
    r_color_list[2] = tmp
    r_color = webcolors.IntegerRGB(r_color_list[0], r_color_list[1], r_color_list[2])
    return r_color
 or ：
def BGR_to_RGB(cvimg):
    pilimg = cvimg.copy()
    pilimg[:, :, 0] = cvimg[:, :, 2]
    pilimg[:, :, 2] = cvimg[:, :, 0]
    return pilimg

In fact, the principle is to exchange the relative positions of the array storing image data