High-quality Compression of Mipmapped Textures

Andujar, C.

High-quality Compression of Mipmapped Textures

Files

053-060.pdf (8.8 MB)

Date

2021

Authors

Andujar, C.

Publisher

The Eurographics Association

Abstract

High-quality texture minification techniques, including trilinear and anisotropic filtering, require texture data to be arranged into a collection of prefiltered texture maps called mipmaps. In this paper we present a compression scheme for mipmapped textures which achieves much higher quality than current native schemes by exploiting image coherence across mipmap levels. The basic idea is to use a high-quality native compressed format for the upper levels of the mipmap pyramid (to retain efficient minification filtering) together with a novel compact representation of the detail provided by the highest-resolution mipmap. Key elements of our approach include delta-encoding of the luminance signal, efficient encoding of coherent regions through texel runs following a Hilbert scan, a scheme for run encoding supporting fast random-access, and a predictive approach for encoding indices of variable-length blocks. We show that our scheme clearly outperforms native 6:1 compressed texture formats in terms of image quality while still providing real-time rendering of trilinearly-filtered textures.

        @inproceedings{10.2312:pt.20111129
,
booktitle = {V Ibero-American Symposium in Computer Graphics
},
editor = {Silva, F. and Gutierrez, D. and Rodríguez, J. and Figueiredo, M.
},
title = {{High-quality Compression of Mipmapped Textures
}},
author = {Andujar, C.
},
year = {2021
},
publisher = {The Eurographics Association
},
ISBN = {978-3-03868-152-6
},
DOI = {10.2312/pt.20111129
}
}