MATLAB: Matlab: Extracting a ROI with center coordinates

Question

I have a mammographic image of size 1024 x 1024, and I have the center coordinates of the anomaly (338.314) and the radius (56) in pixels of the circle containing the anomaly. I desire to extract a region of interest of size 128 * 128 including the anomaly. I tried with

rect = [338-64,314-64,127,127]; crop = imcrop (img, rect) ; but I obtien an ROI that does not contain the desired anomaly. any suggestions please.

Answer 1

Are you sure you're getting row, column correctly matched up with x,y? Remember x,y is column, row, NOT row, column. Try

rect = [314-64, 338-64,127,127];

and see if that fixes it.