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I am trying to segment a 3D shape using levelset. I want to track shape movement in consecutive frames.

Now I want to create a signed distance function matrix for initialization of levelset algorithm using previous frame surface calculated as 3D points.

First, I have to create a logical 3D matrix in which all points inside previous frame surface points are '1' and '0' otherwise. Then I have to calculate 3D signed distance function matrix from it.

How can I do that?

Thank you for your help.

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