Precision Measurement Using Template Matching for Laser Speckle Patterns from Different Materials

Abstract:

The accuracy of precision measurement is an essential requirement for precision positioning. This paper presents a new precision measurement method by combining the uniqueness analysis of laser speckle patterns (LSPs) and the template matching algorithm. In this paper, an invariant speckle capturing device and template matching criteria are developed. Experimental results have shown that LSPs can demonstrate different unique and invariant properties even though they are captured from the same material but different samples. Also, accurate direction and displacement information of moving LSPs can be obtained in real-time. Therefore, this merit can provide the potential of speckle pattern analysis for applications of precision positioning in the future.

• Periodical: Advanced Materials Research (Volume 579)
• Pages: 251-259
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.579.251
• Online since: October 2012
• Authors: Chih Ming Liao, Ping Sheng Huang, Ting Wei Chiang, Chun Hao Chen, Yi Yuh Hwang
• Keywords: Laser Speckle Patterns, Precision Measurement, Template Matching

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