arXiv:2611.12650 · v1

Explicit LOD-Conditioned Anisotropic Filtering for Neural Texture Compression

首次提交 2026-11-10 00:22

版本更新 2026-11-10 00:22

雷达观测 2026-11-10 15:22

摘要

Neural texture compression (NTC) stores material textures compactly, but the dominant feature-pyramid design receives no filtering from the GPU texture unit: it learns each material at a fixed UV and level of detail and has no explicit anisotropic-filtering (AF) mechanism. Setting the filter from the footprint aspect ratio alone is not enough: a single input cannot carry both the shape of the footprint and its size, so the image is too blurry near the camera by the same amount at every distance. Our method, AF-NTC, instead conditions the decoder on the same three bounded values a hardware sampler uses: minor-axis scale (LOD), aspect ratio, and major-axis orientation. These drive a tap line along the major axis and a level blend across the minor axis, and we train against anisotropically filtered ground truth. At $25\%$ of a full BC7 mip chain, AF-NTC beats the no-AF trilinear-BC7 baseline on all ten material--scene pairs we compare ($+1.3$ to $+7.6$\,dB), and it is $0.0$ to $3.4$\,dB below the $4\times$-larger anisotropic-BC7, depending on the material.