Gloss measurement system

Details Gloss measurement system Gloss measurement system

1995-08-25

1996-09-03

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

Of surface reflection

356446, 356448, 348128, G01J 400

Patent

active

055528902

ABSTRACT:
A gloss measurement system for optically measuring gloss based solely on the specular light reflected from an object. Two polarizing filters, each oriented 90 degrees with respect to each other, are used in order to separate the diffuse or color reflection component from the specular or gloss reflection component. Two images are digitized sequentially using each of the two polarizing filters. The images are subtracted from each other on a pixel by pixel basis and the resulting image contains only specular or gloss reflections. This resulting image is then statistically manipulated in order to group gloss pixels by magnitude. This grouping results in a gloss profile which is a direct indicator of surface gloss.

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