Proceedings Article | 3 October 2008
Proc. SPIE. 7155, Ninth International Symposium on Laser Metrology
KEYWORDS: Gold, RGB color model, Inspection, Plating, Machine vision, Video, Cameras, Electronics, Manufacturing, X-ray fluorescence spectroscopy
Two aspects of electroplated gold that are often inspected on are plating thickness, and verification of gold presence at
desired regions. With the later, in-situ reporting is desired. In this work, 8 color spaces - RGB, rgb, I1I2I3, HSI, YUV,
YIQ, XYZ, and L*a*b* - were investigated to differentiate between regions with and without electroplated gold. It was
found that the r, b, I2, H, U, V, I, Q, Z, and b* color space components provided distinct two level differentiability; while
the R, G, and S color space components permitted differentiation at non distinct two levels. It was also uncovered that
grayscale imaging would not permit any form of differentiation. The findings here indicate feasibility in using machine
vision in tandem with color space analysis for electroplated gold inspection.
