How can i extract a set of data if the corner points are known(not square) from a large matrix?
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I have an image and using impoly image handle i can draw a polygon and get the x and y coordinates of the corner points.It is not a square or a rectangle. My aim is to extract the values coming within this region from a bigger matrix. I have attached an image from which a polygon is shown. i use polygon only to get the coordinates, but my matrix is another one.Please help me out.
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Image Analyst
2014 年 2 月 13 日
Create the mask with the .createMask method of the object returned by impoly(), then extract the values
pixelsInsidePoly = redChannel(mask); % Repeat for green and blue channels.
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