How to extract the ROI using impoly?

1 view (last 30 days)
using impoly(); how to extract the Region of Interest alone?? Here Im getting Errors.
grayImage = imread('pout.tif');
figure, imshow(grayImage);
h = impoly;
position = wait(h);
croppedImage = imcrop(grayImage, position);

Accepted Answer

David Legland
David Legland on 8 Oct 2012
Edited: David Legland on 8 Oct 2012
You should use either imcrop, or impoly.
Using imcrop, you can select a rectangular region of interset. By the way, there is also a syntax "IMG2 = imcrop(IMG);". You can use like this:
grayImage = imread('pout.tif');
figure, imshow(grayImage);
img2 = imcrop;
Using impoly, you can select a polygonal region of interest. This polygon can be represented as an ordered list of vertex coordinates. You can then convert this polygon into a binary mask by using "roipoly" function.
regards, David

More Answers (1)

Karbala'a Unvi. Science
Karbala'a Unvi. Science on 21 Nov 2014
hi, I need the help in reconstruct the cropped image back to the original image... PLS need the help urgently

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!