custom_blue_filter, revisited#

Rewrite your custom_blue_filter function that takes in 4 input parameters:

img - an image represented as a 2D list
top_left - top left corner of the region where the blue filter needs to be applied
height - height of the region where the filter needs to be applied
width - width of the region where the filter needs to be applied

Your function should return the modified img 2D list

Blue Filter - Similar to the red filter explained in this lesson, in a blue filter you need to retain the blue component of the corresponding pixel while making the red and green components to be 0.

Sample Input 1:

[[(80, 90, 40), (40, 50, 32)], [(23, 44, 56), (67, 231, 23)]]
(1,1)
1
1

Sample Output 1:

[[(80, 90, 40), (40, 50, 32)], [(23, 44, 56), (0, 0, 23)]]

Sample Input 2:

[[(80, 90, 40), (40, 50, 32), (231, 111, 110)], [(23, 44, 56), (67, 231, 23), (231, 111, 110)], [(231, 190, 120), (140, 150, 231), (231, 111, 110)]]
(0,0)
2
3

Sample Output 2:

[[(0, 0, 40), (0, 0, 32), (0, 0, 110)], [(0, 0, 56), (0, 0, 23), (0, 0, 110)], [(231, 190, 120), (140, 150, 231), (231, 111, 110)]]