Remove a region in Image

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Kev
Kev on 16 Dec 2013
Commented: Image Analyst on 17 Dec 2013
Hi,
I'm looking to remove a region from images. For example, I'd like to use freehand as shown in the image and delete that portion of the image, i.e., turn it in to white because some unpredictable regions like that are troublesome. I'd like to use it for as many time as necessary. I looked into roi, but it turns entire image black and the selected region white. Also, how can you make sure freehand is enclosed. Would you require both ends of the freehand going inside, so you're always sure it is enclosed. Will freehand be always enclosed? Looks like there is a small gap between two ends.
Thanks for the help!

Accepted Answer

Image Analyst
Image Analyst on 16 Dec 2013
Edited: Image Analyst on 16 Dec 2013
That is exactly what my freehand masking demo does. It's attached below in blue.
  13 Comments
Image Analyst
Image Analyst on 17 Dec 2013
Don't use clear or clearvars or clearall in a GUI, and don't use evalin() - there's never a need to do that. That is what is causing problems. If your axes have more than one image, then call cla('reset') before you call imshow().

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