how to detect rough boundary of a object in a image

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Frank Jiang
Frank Jiang le 2 Mar 2018
Réponse apportée : Arun Mathamkode le 20 Mar 2018
I have a BW(black and white) image like this, and I am trying to detect the boundary in the center (as I have drawn in the second image). How should I program to get it?
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Frank Jiang
Frank Jiang le 2 Mar 2018
The original image can be found as attached.

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Arun Mathamkode
Arun Mathamkode le 20 Mar 2018
I think the morphological operations like erode and dilate will be useful in separating the central bell-shaped region from the rest white region. First, you may need to use a combination of imerode and imdilate for this. Once you have separated the central region you use the bwboundaries function to find the boundary.

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