Digital Fringe Multiplication of Photoelastic Images—a New Approach

Chen, T. Y.

doi:10.1111/j.1747-1567.1994.tb02379.x

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…They observed that the simple subtraction pixel by pixel of the gray levels in the light‐field and the dark‐field images produced fringe multiplication by a factor of 2. Chen 38 came up with another digital fringe multiplication technique, which used the light‐field circular polariscope arrangement. The gray‐scale value, for each pixel, was transformed by using a formula taken trigonometry.…”

Section: Image Digitalizationmentioning

confidence: 99%

Data Acquisition Techniques in Photoelasticity

Fernández¹

2010

Experimental Techniques

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Section: Image Digitalizationmentioning

confidence: 99%

Data Acquisition Techniques in Photoelasticity

Fernández¹

2010

Experimental Techniques

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“…Because the fringe orders N1 and N2 are multiple-valued numbers, actual values of N1 and N2 at any point must satisfy eq (8). The search for exact fringe orders from the multiple-valued N1 and N2 can be done on a computer.…”

Section: Theoretical Determination Of Fringe Ordermentioning

confidence: 98%

Digital determination of photoelastic birefringence using two wavelengths

Chen

1997

Experimental Mechanics

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ABSTRACT--A new approach for digital determination of photoelastic birefringence is proposed. The relationships between the intensity values and the fringe orders of two wavelengths are derived. This scheme allows for automatic determination of fringe orders of a full-field photoelastic fringe pattern without using zero-order fringes in the fringe pattern. The usefulness of this method was demonstrated on two experimental fringe patterns with different wavelengths.

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“…S1(b), where N = (σ 1 − σ 2 )t/F s ) is the fringe order. [2] and Liu and Yu [3] the problems described in section 2.A would be faced. Therefore, these images cannot be used for obtaining fractional fringe orders directly.…”

Section: Demonstration With Simulated Imagesmentioning

confidence: 99%

Supplementary document for Accurate Determination of Fractional Retardations in Photoelasticity through Digital Fringe Multiplication - 5479910.pdf

Swain,

Thomas,

Selvan

et al. 2021

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As mentioned in the section 4 of the manuscript, the results demonstrating the proposed schemes using synthetic images are reported here. Moreover, the parametric study for investigating the influence of pixel resolution and bit-depth on fringe multiplication is also presented. Finally, results towards understanding fringe multiplication at stress concentration zones have been reported with a numerically generated fringe pattern.

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Digital Fringe Multiplication of Photoelastic Images—a New Approach

Cited by 9 publications

References 4 publications

Data Acquisition Techniques in Photoelasticity

Data Acquisition Techniques in Photoelasticity

Digital determination of photoelastic birefringence using two wavelengths

Supplementary document for Accurate Determination of Fractional Retardations in Photoelasticity through Digital Fringe Multiplication - 5479910.pdf

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