How do I set up a for loop to replace specific pixels of a color image (with a value of 0) with specific pixels of another color image?

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I would like overlap a small picture (200x300) into a specific area of a big picture (2000x2600). How would I set up a for loop to make this action take place with two color photos?

Accepted Answer

Image Analyst
Image Analyst on 28 Feb 2014
Try this (untested):
% Find logical indexes of where there is 0 in image1.
zeroPixels = image1 == 0;
% Replace them with the same pixels from image 2
image1(zeroPixels) = image2(zeroPixels);
If that doesn't work, let me know.
  5 Comments
Image Analyst
Image Analyst on 28 Feb 2014
Sure. Feel free to hard code in coordinates if you want, instead of having the user click where to paste it.

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