Need to set all channels(RGB) into 0 of a particular pixel in a RGB image

How I set all channels(RGB) into zero of a particular pixel in a RGB image ?

Answer 1

[Jan]

img   = 0.6 + 0.4 * rand(30, 20, 3);  % Test image with light colors
pixel = [12, 17];
img(pixel(1), pixel(2), :) = 0;
figure;
image(img);

Not the pixel at position (12, 17) is black.

[Piyum Rangana]

Hi Jan

Although I set zero like that, the uint8 array values does not get 0. in my case it is a '16×35×3 uint8 array'.

[Jan]

Please post your code.