Towards online measurement of roughness using laser speckle contrast

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作者：
机构：
[1] Pladellorens, J.
[2] Cusola, O.
[3] Caum, J.
[4] Royo, S.
[5] Tosas, A.
[6] Pino, A.
来源：
Pladellorens, J. (pladellorens@oo.upc.edu) | 1600年 / Appita Inc.卷 / 67期
关键词：
Image processing - Paper - Speckle;
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摘要：
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 to measure the roughness of paper based on the analysis of speckle contrast 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, so this method can be considered as a non-contact surface profiling method that can be used online.
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