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Impoly to choose all the ROI

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Ann G
Ann G 2015-10-2
评论： Image Analyst 2015-10-6
Hello! I would like to ask, how can I use impoly to choose all the ROI and not just the polygon that is around it!

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Adam
Adam 2015-10-2
编辑：Adam 2015-10-2
mask = createMask( hROI, hIm );
should give you a binary mask for the region, where hROI is your impoly and hIm is the handle of image on which it was drawn.
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Ann G
Ann G 2015-10-6
Thank u for your help but unfortunately i still have a problem because i dont want a mask. Using mask as a return I get 0s and 1s and I need the elements of the ROI as they are!
Image Analyst
Image Analyst 2015-10-6
This will apply the mask to the original image to erase the original pixels everywhere outside the mask:
% Initialize output to be same as input.
maskedImage = grayImage;
% Now erase pixels outside the mask.
maskedImage(~mask) = 0;

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