Find the indices of a pixel in am image through RBG value and sort that indices in a 2d matrix

Question

I want to find the indices (x y coordinate) of pixels that have a specfic RGB values (237,28,36) for example, in an image  with the dimension of (16x24x3), and then I want to save these indices into 2D logical matrix.

Kshitij Singh · Accepted Answer

Something like this
img; % 16x24x3
x = reshape([237,28,36], 1, 1, []);
mask = all(img==x, 3)
mask is a 2D logical matrix.

Find the indices of a pixel in am image through RBG value and sort that indices in a 2d matrix

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