create mask circle with radius 6 with center at x,y in matlab

You can create a mask circle with radius 6 with center at x,y in Matlab as follows:

main.m
% Set circle center and radius
x = 50;
y = 50;
r = 6;

% Create a meshgrid of x-y coordinates
[xx, yy] = meshgrid(1:size(image, 2), 1:size(image, 1));

% Create a binary mask of pixels within the circle
circle = (xx - x).^2 + (yy - y).^2 <= r.^2;

% Set masked pixels to desired value (e.g. 255)
image(circle) = 255;
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This code creates a meshgrid of x-y coordinates for the image, and then creates a binary mask of pixels within the circle by checking if each pixel's distance from the center is less than or equal to the radius. Finally, you can set the masked pixels to a desired value (e.g. 255) to create the mask circle.