Measure of roughness of paper using speckle

Authors :: Abdiel Osvan Pino
Josep Pladellorens
Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria
Universitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
Source :: Pino A., Pladellorens J., “Measure of roughness of paper using speckle”, Journal article, Proceedings of SPIE, Volume 7432, Pages 74320E1-74320E9, (2009)., Recercat. Dipósit de la Recerca de Catalunya, instname, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC)
Publication Year :: 2009
Publisher :: SPIE, 2009.
Abstract: Roughness of a paper surface is particularly important in paper and board destined to be printed. Surfaces are often coated and the amount of coating and method of application used depends on the roughness of the base paper. We present a method of measure of the roughness of the paper based in the analysis of speckle pattern on the surface. Images are captured by means of a simple configuration using a laser and a camera CCD. Then, we apply digital image processing using the co-occurrence matrix, so this method can be considered as a non-contact surface profiling method, that can be used online.

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