MATLAB: Take average of the nearest n pixels

Question

I have a 512x512x100 matrix of an image. I want to replace every pixel in a certaint section of that matrix (i have a seperate 512x512x100 mask of that section to know the location) to become the average of the nearest n pixels which are not in that section. The mask of the section is different in each of the 100 images.

Thanks

Answer 1

If you have the Statistics Toolbox, you could use knnsearch,

https://www.mathworks.com/help/stats/knnsearch.html