Dynamic deformation inspection of a human arm by using a line-scan imaging system

Eryi Hu

doi:10.1117/12.837739

20 November 2009 Dynamic deformation inspection of a human arm by using a line-scan imaging system

Eryi Hu

Proceedings Volume 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 751118 (2009) https://doi.org/10.1117/12.837739
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

A line-scan imaging system is used in the dynamic deformation measurement of a human arm when the muscle is contracting and relaxing. The measurement principle is based on the projection grating profilometry, and the measuring system is consisted of a line-scan CCD camera, a projector, optical lens and a personal computer. The detected human arm is put upon a reference plane, and a sinusoidal grating is projected onto the object surface and reference plane at an incidence angle, respectively. The deformed fringe pattern in the same line of the dynamic detected arm is captured by the line-scan CCD camera with free trigger model, and the deformed fringe pattern is recorded in the personal computer for processing. A fast Fourier transform combining with a filtering and spectrum shifting method is used to extract the phase information caused by the profile of the detected object. Thus, the object surface profile can be obtained following the geometric relationship between the fringe deformation and the object surface height. Furthermore, the deformation procedure can be obtained line by line. Some experimental results are presented to prove the feasibility of the inspection system.

Citation Download Citation

Eryi Hu "Dynamic deformation inspection of a human arm by using a line-scan imaging system", Proc. SPIE 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 751118 (20 November 2009); https://doi.org/10.1117/12.837739

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KEYWORDS

Line scan image sensors

Fringe analysis

Fourier transforms

Inspection

CCD cameras

Imaging systems

Projection systems

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