Why does my code not add the lists it is given even though it is told to do so?-CodePudding

The

CodePudding user response：

seems you only take the blue value. try:

blue = list(Read[i][j])[0] green = list(Read[i][j])[1] red = list(Read[i][j])[2]

also move lib3 = [] to before your loops otherwise you are overriding your list for each pixel

CodePudding user response：

Doesn't this piece of code do what you want ?

img_with_rgb_sum = list(map(lambda row : list(map(lambda color : sum(color), row)), Read))

Input

Read = [[[171, 127, 30], [19, 213, 66], [19, 187, 2], [2, 104, 247]], [[217, 120, 234], [47, 114, 57], [68, 59, 152], [104, 204, 205]], [[162, 156, 74], [209, 242, 95], [184, 169, 169], [73, 245, 206]], [[86, 233, 254], [137, 122, 221], [215, 221, 101], [195, 171, 52]]]

Output

img_with_rgb_sum = [[328, 298, 208, 353], [571, 218, 279, 513], [392, 546, 522, 524], [573, 480, 537, 418]]