The Measuring Opacity of Paper by Scanner

The opacity is one of the important properties of various commercial products such as paper. The common opacity measurement method by using spectrophotometer is expensive. This work explains the novel method for measuring opacity by using scanner as a lower cost instrument. The opacity is evaluated by using RGB value of paper image which was obtained by scanner. The obtained results indicate that opacity measurement performance of scanner is comparable with spectrophotometer. The best opacity estimation is obtained conversion RGB to CIELab color space. J. Color Sci. Tech. 7 (2013)، 15-24© Institute for Color Science and Technology.