Is there any correlation kernel that keeps the roi of an image

 

 

 

% a single-channel image
inpict = imread('cameraman.tif');

% a logical mask
mask = imread('sources/standardmods/cman/cmantifmk.webp')>128;

% invert the mask and use a zero-valued kernel
%outpict = roifilt2(0,inpict,~mask);

% invert the mask and use a function handle which returns a 
% zero-valued array of the same size and class as the image
outpict = roifilt2(inpict,~mask,@(x) 0*x);

% presuming the following:
% mask is logical-class
% image is not signed-integer class
% mask and image have same number of channels
outpict = inpict;
outpict(~mask) = 0;