creat mask from random border lines for time frame cropping

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Hassan 2015-10-11

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评论： ali hammood 2017-10-3

Hi all,

I want to crop the maximum rectangle area in image 'frame' as the red rec. in image 'frame1'. I am looking to have a mask from this image for another images, means I am looking for coordinates of the red frame. The red frame has to keep the original image x, y ratio.

Thanks, HM

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Image Analyst 2015-10-11

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This is not that well defined. What if you have a hairline black line meandering from the upper left corner down into the lower right quadrant? What would be the inner bounding box then? Why does the mask need to be a perfect rectangle anyway? Maybe you can just use what you got and call imclose() or bwconvhull(), and then shrink it a few layers by calling imerode().

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Hassan 2015-10-12

编辑：Hassan 2015-10-12

The image that I sent is the final version in terms of additional noise (black lines) that can be in the image. Suggestion for a solution: If I take a frame on the outer borders of the image and start a while loop shrinking this frame 1px each loop from all directions until no black lines (dots in this case) touches the frame. At the end I will get one solution. What do you think? Could you please help me to write such code? Thanks, HM