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woodfrog / maptracker

Code for paper "MapTracker: Tracking with Strided Memory Fusion for Consistent Vector HD Mapping", ECCV 2024 (Oral)
https://map-tracker.github.io/
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The issue regarding the number of permutations of point sets #6

Closed sxs505 closed 4 months ago

sxs505 commented 4 months ago

In the code, when observing the ground truth part, if there are 20 points in a line element of a vectors, why are there 38 relations corresponding to it, given that according to maptr's viewpoint, the permutation of point sets should result in 2N?

woodfrog commented 4 months ago

This part is from StreamMapNet. If I remember correctly: because the first and last points of a polygon are the same (duplicated), there are only 19 different coordinates, so we have 38=19*2 permutations. For polylines, there will be only 2 permutations. All things are equivalent to MapTR's viewpoint.