ROI optimization

I would like to choose a region of interest (ROI) above and below an oblique (45°) planar interface in my 2d image. I used ROIPOLY of Matlab to get the rectangular mask from my image. I would like to optimize this rectangular mask so that my model and data values match. How could I programmatically increase/decrease the width and height of the rectangle which I draw parallel to my 45° interface?

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[Sean de Wolski]

Can you post an image to help clarify your question please? (see markup help for instructions.)

[varadharajan]

Hi I added a photo.Thanks!

Answer 1

[Sean de Wolski]

%An Image Processing Morphology Approach

You could use imdilate and imerode with an appropriate structuring element (tuned for 45 degrees) to increase/decrease the height width.

doc imdilate
doc imerode
doc strel