A NOTE ON THE GRADIENT OF A MULTIIMAGE

被引:632
作者
DIZENZO, S [1 ]
机构
[1] IBM CORP,PALO ALTO SCI CTR,PALO ALTO,CA 94304
来源
COMPUTER VISION GRAPHICS AND IMAGE PROCESSING | 1986年 / 33卷 / 01期
关键词
COMPUTER GRAPHICS;
D O I
10.1016/0734-189X(86)90223-9
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
Gradient based edge detection techniques can be extended to multispectral images in various ways: difference operators can be applied to each component of a multi-image, and the results can be combined, e. g. , taking the RMS, or the sum, or the maximum of their absolute values. In all of these approaches the image-components do not actually cooperate with one another, i. e. , edge evidence along a given direction in one component does not reinforce edge evidence along the same direction in other components. To avoid this, the use of the tensor gradient of multi-images regarded as vector fields is suggested. Explicit formulas for the direction along which the rate of change is maximum, as well as for the maximum rate of change itself, are derived.
引用
收藏
页码:116 / 125
页数:10
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