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Avoid jpeg compression artifacts when training Mip-NeRF360. #507

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@jefequien jefequien commented Nov 28, 2024

As noted by https://nerfbaselines.github.io/, the original 3DGS work manually downscales the full-resolution images instead of using the dataset-provided downscaled images to avoid JPEG compression artifacts. This improves PSNR by ~0.27 and allows for a more fair comparison with work building on the original codebase.

image

Screenshot from 3DGS paper. https://arxiv.org/pdf/2308.04079

Results

psnr ssim lpips (vgg) size
mcmc-1M-compressed (Before) 27.27 0.809 0.229 15.8 MB
mcmc-1M-compressed (After) 27.54 0.821 0.214 16.0 MB

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