How to 'color in' pixels of a grayscale image sequence? Or to put it another way: how to convert my set of linear indices specifying pixels in my grayscale sequence to corresponding indices in an RGB sequence?

Supposing I have the linear indices of the pixels which I would like to 'color in'.

If I wanted to set all of those pixels to some specific value in my grayscale image sequence, I could do this:

gryscl_imSeq(LinearPixIndx) = 0.7;

If however, I want to introduce some color I would first need to convert my grayscale image sequence into an m x n x 3 x p matrix, which I could do like this:

RGBvideo = reshape(repmat(reshape(gryscl_imSeq,[],size(gryscl_imSeq,3)),3,1),[size(gryscl_imSeq,1) size(gryscl_imSeq,2) 3 size(gryscl_imSeq,3)]);

If somebody could tell me how to convert my grayscale linear pixels indices into corresponding indices for the RGBvideo I would really appreciate it.

Or if there is a better way to go about what I'm trying to do, I would be very grateful for any suggestions.

Thanks in Advance,

N

Answer 1

[Image Analyst]

Try using ind2rgb().