LOGARITHMIC SPIRAL GRIDS FOR IMAGE-PROCESSING AND DISPLAY

被引：82

作者：

WEIMAN, CFR

CHAIKIN, G

机构：

[1] Department of Mathematical and Computing Sciences, Old Dominion University, Norfolk

[2] Brain Research Laboratory, New York University Medical Center, New York

来源：

COMPUTER GRAPHICS AND IMAGE PROCESSING | 1979年 / 11卷 / 03期

关键词：

D O I：

10.1016/0146-664X(79)90089-3

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

A picture digitization grid based on logarithmic spirals rather than Cartesian coordinates is presented. Expressing this curvilinear grid as a conformal mapping yields many geometric observations useful for computer graphics and picture processing. The exponential mapping induces a computational simplification that suggests parallel architectures in which most geometric transformations are effected by data shifting in memory rather than arithmetic on coordinates. These include noise-free rotation, scaling, and some projective transformations. Conformality of the mapping also preserves many important local picture-processing operattions such as edge detection. Real-time animation or processing of arbitrarily shaded pictures is suggested. © 1979.

引用

页码：197 / 226

页数：30

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