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cwi-dis / cwipc_codec

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Encoder seems to work badly for (some?) pointclouds with unexpected scales #2

Open jackjansen opened 1 year ago

jackjansen commented 1 year ago

Discovered while doing the experiments of @zhouzhouha .

For some of the datasets she used it seems that changing octreeDepth does not make much of a difference (if any). Even going as low as octree depth 5, when we encoded a 400Kpoint cloud the result was still more than 300K points.

@zhouzhouha can you please add a comment here about which dataset it was again? I forgot...

We should investigate whether this is also the case for the 8i datasets. And we should investigate why this happens: octreeDepth should be scale-independent. There may be a subtle other issue with the given dataset, maybe it has funny bounding boxes or something?

zhouzhouha commented 1 year ago

The point cloud is from Vsense dataset. https://v-sense.scss.tcd.ie/research/vsensevvdb2-v-sense-volumetric-video-quality-database-2/ This also happened for 8i dataset, since we need to scale the point cloud from 8i dataset. (from the python script for loot the scale_factor = 500 )