how to crop a particular location of a image?
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I have drawn a star on a image and i want to crop that star region alone. How to do it?
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KIRAN kumar
on 18 Jan 2013
select the area first by selecting the star by defining it then perform corp.u can use image segmentation process for this
Accepted Answer
Image Analyst
on 18 Jan 2013
Use max() and min() to find the extremes of the coordinates you drew. Then you can create a box and use imcrop(). You know that cropping gives you a matrix which is a rectangular shape, right?
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Walter Roberson
on 18 Jan 2013
poly2mask() and use the resulting mask to extract pixels from the image. You will probably also want to calculate the bounding box of the mask and create a rectangular area that size to store the extracted pixels in (as it is not possible to have a matrix which is an irregular shape.)
3 Comments
Walter Roberson
on 18 Jan 2013
I saw it back then but I was busy and I figured someone else would answer.
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