21 November 2007 Research on real-time measurement and grading method for pearl color
Author Affiliations +
Proceedings Volume 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 672308 (2007) https://doi.org/10.1117/12.782703
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China
Abstract
The pearl color and color uniformity are important to its price. The paper presented a new real-time method to measure and grade the pearl color based on optoelectronic techniques. The method uses HSI (Hue, Saturation and Intensity) color model, diffuse reflection illumination, CCD (Charge Couple Device) camera with fine color reproduction and digital image processing technology to realize the parameters of color matrix of pearl color. These parameters, including mean values (h and s), variances (σh and σs) and absolute values of third moments (|th| and |ts|) of H and S, were acquired. Then the industrial control computer acquires the grading signals. The grading devices graded the pearls. The method could measure and grade the pearl on real-time and meet the requirement of grading.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Feng Zhu, Feng Zhu, Kaihua Wu, Kaihua Wu, Li Ma, Li Ma, Jilin Zhou, Jilin Zhou, } "Research on real-time measurement and grading method for pearl color", Proc. SPIE 6723, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 672308 (21 November 2007); doi: 10.1117/12.782703; https://doi.org/10.1117/12.782703
PROCEEDINGS
5 PAGES


SHARE
Back to Top