Mesh Comparison - Day 2

DSME-(Histogram-based) Qualitative Mesh Comparison in between ship CAD systems.

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Goal : Develop the module for 3D mesh comparison, in ACIS environment

Todo :

1. Study

• Qualitative shape (search, detection, matching, comparison, ...)
• MeshLab(VCG) or OpenMesh library
• ACIS

    2. Implementation

• TBA...

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• Qualitative shape (search, detection, matching, comparison, ...)

- Method will be based on THIS, "Shape distributions".

- It looks good for the first step implementation.

- Unfortunately, it seems that there is no public library that can be easily integrated into ACIS environment.

- As far as I know, for the development of the "Shape distributions" approach, three major calculation step should be implemented

1. Sampling - (over)sample the vertices form the surface, for distribution calculation.
2. Distribution calculation - A3, D1, D2, D3 or D4 metric calculation among the sampled vertices and counts it to generate the histogram.
3. Distribution comparison - Turn histogram into distribution function and calculate the dissimilarity.

• MeshLab(VCG) or OpenMesh library

- Not going to use the VCG or OpenMesh library, since it contains much more functionality than we needed.

- It means the entire system will be heavy if we use that.

- Instead, the segments of codes or applications will be developed or integrated in ACIS.

- At this time, the resource from HERE is tested for the sampling task.

Left picture shows original model with 298 vertices for 492 faces.
Right picture shows 10000 sampled vertices.
The model is from the Princeton Shape Benchmark

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Additional Resources