Fastest Way To Iterate Over All Pixels Of An Image In Python

i have already read an image as an array : import numpy as np from scipy import misc face1=misc.imread('face1.jpg') face1 dimensions are (288, 352, 3) i need to iterate over every

Solution 1:

You can use broadcasting to perform broadcasted comparison against the white pixel : [255, 255, 255] and ALL reduce each row with .all(axis=-1) and finally convert to int dtype. This would give us the output you would have right after exiting the loop.

Thus, one implementation would be -

(~((face1 == [255,255,255]).all(-1).ravel())).astype(int)

Alternatively, a bit more compact version -

1-(face1 == [255,255,255]).all(-1).ravel()