Straightening a curved cylindrical structure

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Cat-22
Cat-22 2021-1-6
回答： Pratyush 2024-2-13
Hello!
I have a solid, wavy, cylindrical structure (with varying values inside) created from a skeleton (bwskel) in a volume. It's kind of squigly and doesn't have any particular direction. I would like to transform this to a cylindrical structure so it displays as a striaght pipe with the correct (interpolated?) values inside. Any ideas on how to do it efficiently? Thanks.
NG

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回答（1 个）

Pratyush
Pratyush 2024-2-13
Hi Cat-22,
To straighten a wavy cylindrical structure in MATLAB and maintain the internal values, you would follow these general steps:
  • Use the skeleton of the structure ("bwskel") to find the wavy centerline.
  • Assign a parameter (like arc length) to the centerline to help map the volume to a straight pipe.
  • Calculate the planes perpendicular to the centerline at each point to sample the structure's cross-section.
  • Map the 3D points of each cross-section to a 2D plane to "unwrap" the structure.
  • Create a straight cylindrical grid and interpolate the unwrapped values onto it.
  • Use the interpolated grid to reconstruct the structure as a straight pipe.
Hope this helps.

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