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

Quinn - 2020-10-23T09:31:37+00:00

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

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.

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Expert Answer

Kshitij Singh answered . 2025-11-20

Something like this

img; % 16x24x3
x = reshape([237,28,36], 1, 1, []);
mask = all(img==x, 3)

mask is a 2D logical matrix.

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