Optoelectronic Correlator based on ATD Vector Vision Model with Liquid Crystal Device for Chromatic Image Recognition

• Main Authors: Chun-Min Wang, 王淳民
• Other Authors: Chulung Chen
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/27421604898318351193

碩士 === 元智大學 === 光電工程研究所 === 96 === In this thesis, we use the ATD color human vision model instead of the traditional RGB color model for polychromatic pattern recognition. Here we utilize the Mach-Zehnder joint transform correlator with image encoding technique to be the optical pattern discrimination cunfiguration. The ATD color human vision model is proposed to be the interpretation of human’s cone mechanisms. Therefore, it is more suitable for human eye’s vision. Besides, we also use the minimum average correlation energy approach to yield sharp correlation peak and achieve the distortion invariance. To compare the recognition ability between ATD vector model and RGB color model, we compare the PSR value for fifteen targets with different colors and shapes. Subsequently, we choose one target from the fifteen images set to estimate the discrimination ability in rotated distortion, noisy distortion, and multiple target recognition. From the numerical results we realize that the recognition ability based on ATD color vision model is accepted.