Pinchmaps: textures with customizable discontinuities

Tarini M., Cignoni P.

I.3.3 Picture/Image Generation. Line and curve generation  Computer Graphics and Computer-Aided Design 

We introduce a new texture representation that combines standard bi-linearly interpolated samples, for smoothly varying regions, with customizable discontinuities for sharp boundaries between these regions. It consists in a standard signal texture, plus a second texture we call pinchmap, which encodes discontinuities along generally curved lines; this structure is stored in texture memory as a pair of images and is efficiently interpreted on commodity graphic hardware in the fragment shader. We also present a fully automatic way to compute a pinchmap and signal texture pair from an much higher resolution image. We show that the nal effect on the screen is a comparable visual quality, for a fraction of the texture storage cost and a very small impact on performance.

Source: Computer graphics forum (Print) 24 (2005): 557–568. doi:10.1111/j.1467-8659.2005.00881.x

Publisher: Basil Blackwell Publishers, Oxford , Paesi Bassi

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