Studies on data processing for laser speckle images of work-piece surface

Chenbo Zhou; Jianxin Wang; Hongyu Xu; Wenying Yu

doi:10.1117/12.676416

19 May 2006 Studies on data processing for laser speckle images of work-piece surface

Chenbo Zhou, Jianxin Wang, Hongyu Xu, Wenying Yu

Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 615020 (2006) https://doi.org/10.1117/12.676416
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

The laser speckle patterns taken from grinded work-piece surface of a glass plane is processed to obtain the data results related to surface roughness using a visual user interface which has been developed with an experimental setup mainly consisting of He-Ne laser and CCD. The functions of processing the speckle images with the user interface are presented such as smooth the images by Gauss filter before other processions, and make the binary images by the threshold got with OSTU and present its histogram. We give the fitting curve of laser speckles' probability density distribution and their parameters, and Calculate their texture characteristic parameters such as angle-second moment, inertia (contrast), correlation and entropy value. The user interface of computer is developed using GUIDE from MATALB. We also present to compare the experimental results produced from laser speckle patterns at different detective angles and distance with the theory. The studies are useful to processing data for the measurement of surface roughness and profile of the work-piece using laser speckle method.

Citation Download Citation

Chenbo Zhou, Jianxin Wang, Hongyu Xu, and Wenying Yu "Studies on data processing for laser speckle images of work-piece surface", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615020 (19 May 2006); https://doi.org/10.1117/12.676416

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