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3D Gaussian Splatting in JAX

Home Page: https://jaxsplat.readthedocs.io

License: MIT License

CMake 0.80% Python 24.77% C++ 20.75% Cuda 53.56% C 0.12%
computer-vision gaussian-splatting jax

jaxsplat's People

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jaxsplat's Issues

JAX JIT does not work

JAX JIT is not supported due to a dynamically shaped array.
ops::project::fwd::xla computes the number of intersections between tiles and Gaussians (num_intersects).
This value is used in ops::rasterize::fwd::xla as the length of a sorted map of intersects to Gaussians (gaussian_ids).
gaussian_ids is also needed in ops::rasterize::bwd::xla, which is where the problem arises: a dynamically shaped array needs to be present in JAX-side code.

gsplat's kernels will probably need to be changed to solve this.
Some discussion on possible solutions: nerfstudio-project/gsplat#175

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