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Matlab: Extracting a ROI with center coordinates

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berkaoui sara
berkaoui sara 2014-9-24
评论： berkaoui sara 2014-9-24
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.

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Image Analyst
Image Analyst 2014-9-24
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.
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Image Analyst
Image Analyst 2014-9-24
And what about the big black block on the left edge of the image. Can you answer my question about that?
berkaoui sara
berkaoui sara 2014-9-24
I really do not know obout the area in black, they specified anything, as I mentioned I only have the pictures and the info file that I attached

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