how to dilate the gray scale image and threshold value only on ROI?
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Susan 2013 年 4 月 10 日
If you created an ROI object, you can create a binary mask from the ROI. Then, you can specify an arbitrary image matrix where the values corresponding to where the mask = 1 are the original gray values, and all others are zero. You can then threshold the new image, since it only contains your ROI, with all other pixels being black. Finally, reverse the process and in the original image, say that anywhere the mask = 1 is now equal to the new, thresholded, image values.
In order to explain this better, I'd have to know more about your code. What function are you using to get your ROI?