학술논문
Effective hybrid processor to compute image moments for pattern recognition
Document Type
Article
Author
Source
Optics Letters; May 1991, Vol. 16 Issue: 9 p654-656, 3p
Subject
Language
ISSN
01469592; 15394794
Abstract
A hybrid optical–digital processor is presented for computing the invariant moments of images in real time, which consists of a holographic mask, two lenses, a charge-coupled-device detector, and a microcomputer. The processor is tested by inputting some roman letters, and the produced results show that the invariant moments of a letter are approximately independent of shift and rotation and that the moments are distinct with different letters.