Hardware Implementation of an Anisotropic Texture Filter

被引：0
|
作者：
Xu Q. [1 ]
Du H. [1 ]
Zeng Z. [1 ]
Wang P. [1 ]
机构：
[1] School of Electronic Engineering, Xi'an University of Posts & Telecommunications, Xi'an
来源：
Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics | 2019年 / 31卷 / 01期
关键词：
Anisotropy; Footprint; Texture anti-aliasing; Texture mapping;
D O I：
10.3724/SP.J.1089.2019.16953
中图分类号：
学科分类号：
摘要：
In order to decrease the texture aliasing during texture mapping, one of methods is to approximate aniso-tropic filtering by isotropic filtering in computer graphics field. In such an approximation, MIP-MAP layer could be obtained using footprint and logarithm, whose implementations cause larger size of the circuits in Cordic or quadratic approximation. In this paper, a linear approximation to calculate footprint and logarithm is presented to simplify their circuits and footprint calculation with one adder and one shifter and logarithm with one adder were implemented. The absolute value of error of MIP-MAP layers between the approximation and origin is less than 7%. The approximate anisotropic filtering proposed in this paper was validated on Xilinx ZC706 board. © 2019, Beijing China Science Journal Publishing Co. Ltd. All right reserved.
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收藏
页码：176 / 182
页数：6
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