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Performing Stereo-Measurements with Optimal Patterns Processed by Localised Spectrum Analysis.

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Title: Performing Stereo-Measurements with Optimal Patterns Processed by Localised Spectrum Analysis.
Authors: Jailin, T.1 (AUTHOR) thomas.jailin@uca.fr, Blaysat, B.1,2 (AUTHOR) benoit.blaysat@uca.fr, Vinel, A.1 (AUTHOR) adrien.vinel@sigma-clermont.fr, Langlois, R.1,3 (AUTHOR) raphael.langlois@ens-paris-saclay.fr, Sur, F.4 (AUTHOR) frederic.sur@loria.fr, Grédiac, M.1 (AUTHOR) michel.grediac@uca.fr
Source: Experimental Mechanics. Nov2025, Vol. 65 Issue 9, p1461-1472. 12p.
Subjects: Stereo image, Stereo image processing, Metrology, Measuring instruments, Acquisition of data, Digital image correlation
Abstract: Background: Localised Spectrum Analysis is a full-field measurement method which enables processing optimal patterns (i.e. checkerboard patterns) and obtaining high metrological performance. However, LSA was still limited to 2D cases. Objective: This paper presents stereo-LSA, an extension of the method for stereo image pairs, enabling the measurement of the 3D displacement field on sample surfaces engraved with optimal checkerboard patterns. Methods: A standard stereo procedure is followed. The LSA formulation is updated to take into account global rotations induced by the stereo angle. Results: The technique is applied to three different cases. A synthetic case is used to validate the stereo implementation, and a comparison is proposed with stereo digital image correlation, routinely used in the community. Conclusions: Stereo-LSA enables measuring 3D-displacement field on a sample surface prepared with checkerboard patterns, leading to high metrological performance. [ABSTRACT FROM AUTHOR]
Copyright of Experimental Mechanics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 189705470
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  Data: Performing Stereo-Measurements with Optimal Patterns Processed by Localised Spectrum Analysis.
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  Data: <searchLink fieldCode="AR" term="%22Jailin%2C+T%2E%22">Jailin, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> thomas.jailin@uca.fr</i><br /><searchLink fieldCode="AR" term="%22Blaysat%2C+B%2E%22">Blaysat, B.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> benoit.blaysat@uca.fr</i><br /><searchLink fieldCode="AR" term="%22Vinel%2C+A%2E%22">Vinel, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> adrien.vinel@sigma-clermont.fr</i><br /><searchLink fieldCode="AR" term="%22Langlois%2C+R%2E%22">Langlois, R.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> raphael.langlois@ens-paris-saclay.fr</i><br /><searchLink fieldCode="AR" term="%22Sur%2C+F%2E%22">Sur, F.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> frederic.sur@loria.fr</i><br /><searchLink fieldCode="AR" term="%22Grédiac%2C+M%2E%22">Grédiac, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> michel.grediac@uca.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Experimental+Mechanics%22">Experimental Mechanics</searchLink>. Nov2025, Vol. 65 Issue 9, p1461-1472. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Stereo+image%22">Stereo image</searchLink><br /><searchLink fieldCode="DE" term="%22Stereo+image+processing%22">Stereo image processing</searchLink><br /><searchLink fieldCode="DE" term="%22Metrology%22">Metrology</searchLink><br /><searchLink fieldCode="DE" term="%22Measuring+instruments%22">Measuring instruments</searchLink><br /><searchLink fieldCode="DE" term="%22Acquisition+of+data%22">Acquisition of data</searchLink><br /><searchLink fieldCode="DE" term="%22Digital+image+correlation%22">Digital image correlation</searchLink>
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  Data: Background: Localised Spectrum Analysis is a full-field measurement method which enables processing optimal patterns (i.e. checkerboard patterns) and obtaining high metrological performance. However, LSA was still limited to 2D cases. Objective: This paper presents stereo-LSA, an extension of the method for stereo image pairs, enabling the measurement of the 3D displacement field on sample surfaces engraved with optimal checkerboard patterns. Methods: A standard stereo procedure is followed. The LSA formulation is updated to take into account global rotations induced by the stereo angle. Results: The technique is applied to three different cases. A synthetic case is used to validate the stereo implementation, and a comparison is proposed with stereo digital image correlation, routinely used in the community. Conclusions: Stereo-LSA enables measuring 3D-displacement field on a sample surface prepared with checkerboard patterns, leading to high metrological performance. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Experimental Mechanics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Nov2025
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