Fit rectangle to binary mask

2021 4 23
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更新时间：2021 5 1
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I have a binary mask prediction imported into matlab from neural network training. It's just a large array filled with zeros, except where the predictied structures lies, it is filled with ones. The predicted structure looks more ore less like a rectangle and i need to get these 4 corner coordinates from the predicted mask. So my idea would be to fit a rectangle to the predicted mask and read out the corner coordinates of the rectangle. Is there an existing function for this? Or does anyone have another approach?

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Matt J
Matt J 2021-4-23
编辑：Matt J 2021-4-23

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See the FEX submission pgonCorners (which you must Download).

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Stefan Lang
Stefan Lang 2021-4-30
Is there any way to fit a rectangle to these corner points? Sometimes 2 of the proposed corner points from pgonCorners lie in the same corner region. If i ask to propose e.g. 8 points, each corner region has some corner points in it. How can i fit a rectangle to these 8 points and get the corner coordinates of the rectangle?
Matt J
Matt J 2021-4-30
Sometimes 2 of the proposed corner points from pgonCorners lie in the same corner region.
It would be good to see a sample image where that occurs. That shouldn't happen if pgonCorners is run with the right settings.
Stefan Lang
Stefan Lang 2021-4-30
I tried it with the attached file and the following code:
vertebra_corners_frontal = corner_prediction(vertebras_frontal,4,100)
pgonCorners is inside corner_prediction. Some vertebras get 2 corner points in one corner. If i adjust angular sample, i even sometimes get only 3 points for each region.
Matt J
Matt J 2021-5-1
Again, it would be good to see a sample image where that occurs.

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