How to crop an image around certain xy coordinates?

This may be a simple question but I am extremely new to Matlab and coding in general. I have the coordinates of a circle's center by using the imfindcircles function. I want to be able to find the total pixel value of a 25x25 pixel box around the given coordinates. I'm not really sure how this can be done at all. Is there a way to plot such a box around a given xy coordinates? Thank you in advance!

Answer 1

[Walter Roberson]

Given x and y as integers, then

cropped = YourArray(y - 12 : y + 12, x - 12 : x + 12, :);

Assuming that the x and y are not within 12 of the edge of the image.

After that it depends what you mean by "total pixel value". You might mean

sum(cropped(:))

or you might mean

nnz(cropped)

[Image Analyst]

Or maybe use mean2() on the cropped image.

meanInBox = mean2(cropped)