Table-based Alpha Compression


In this paper we investigate low-bitrate compression of scalar textures such as alpha maps, down to one or two bits per pixel. We present two new techniques for 4× 4 blocks, based on the idea from ETC to use index tables. We demonstrate that although the visual quality of the alpha maps is greatly reduced at these low bit rates, the quality of the final… (More)
DOI: 10.1111/j.1467-8659.2009.01409.x


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