Measurement of Strain Distribution of Composite Materials by Electron Moiré Method

Kishimoto, Seiji; Tanaka, Yoshihisa; Naito, Kimiyoshi; Kagawa, Yutaka

doi:10.5772/24036

Nanocomposites With Unique Properties and Applications in Medicine and Industry 2011

DOI: 10.5772/24036

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Measurement of Strain Distribution of Composite Materials by Electron Moiré Method

Seiji Kishimoto¹,

Yoshihisa Tanaka²,

Kimiyoshi Naito³

et al.

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2015

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Full-Field Displacement Measurement Technique by Using Repeated Patterns and JPEG Compressed Images

Hayashi

Tsuda

et al. 2015

Optics

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This paper presents an experimental technique for measuring displacement distribution from an image of repeated patterns and JPEG compressed images. The measurement accuracy of the developed method is insusceptible to the degree of JPEG compression because only lower spatial frequency components of the repeated pattern are used to calculate the displacement distribution, and high spatial frequency components have high priority to cutoff according to the JPEG compression algorithm. The insensitivity to the JPEG compression was confirmed by a displacement measurement using JPEG images of various compression ratios or image qualities. We found that by using the highest quality JPEG image, the accuracy of displacement measurement could research 1/1000 of the repeated pattern pitch, as same the uncompressed BMP images. In addition, displacement with accuracy of 1/500 pitch could be measured from a compressed JPEG image of which the file size was 1/50 of that of the BMP image. This technique is useful for measurement using a high-speed camera with high-resolution digital images for a long-term or wireless image transfer.

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Full-Field Displacement Measurement Technique by Using Repeated Patterns and JPEG Compressed Images

Hayashi

Tsuda

et al. 2015

Optics

View full text Add to dashboard Cite

show abstract

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Measurement of Strain Distribution of Composite Materials by Electron Moiré Method

Cited by 1 publication

References 11 publications

Full-Field Displacement Measurement Technique by Using Repeated Patterns and JPEG Compressed Images

Full-Field Displacement Measurement Technique by Using Repeated Patterns and JPEG Compressed Images

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