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Active and Passive Electronic Components
Volume 2016, Article ID 7467165, 16 pages
http://dx.doi.org/10.1155/2016/7467165
Research Article

Color Calibration for Colorized Vision System with Digital Sensor and LED Array Illuminator

School of Electrical and Electronic Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, China

Received 26 February 2016; Accepted 21 April 2016

Academic Editor: Huikai Xie

Copyright © 2016 Zhenmin Zhu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Color measurement by the colorized vision system is a superior method to achieve the evaluation of color objectively and continuously. However, the accuracy of color measurement is influenced by the spectral responses of digital sensor and the spectral mismatch of illumination. In this paper, two-color vision system illuminated by digital sensor and LED array, respectively, is presented. The Polynomial-Based Regression method is applied to solve the problem of color calibration in the sRGB and color spaces. By mapping the tristimulus values from RGB to sRGB color space, color difference between the estimated values and the reference values is less than . Additionally, the mapping matrix has proved a better performance in reducing the color difference, and it is introduced subsequently into the colorized vision system proposed for a better color measurement. Necessarily, the printed matter of clothes and the colored ceramic tile are chosen as the application experiment samples of our colorized vision system. As shown in the experimental data, the average color difference of images is less than . It indicates that a better performance of color measurement is obtained via the colorized vision system proposed.