How noise propagates from camera sensor to displacement and strain maps obtained with the grid method

Michel Grediac 1 Frédéric Sur 2
2 MAGRIT - Visual Augmentation of Complex Environments
Inria Nancy - Grand Est, LORIA - ALGO - Department of Algorithms, Computation, Image and Geometry
Abstract : It is shown that the effect of sensor noise in displacement and strain maps obtained with the grid method can be accurately predicted. Analytical expressions linking resolution and spatial resolution in these maps on the one hand, and standard deviation of sensor noise on the other hand are first given. These expressions are then experimentally evidenced. It is shown that a grid image preprocessing step must be performed to reach this goal in order to account for heteroscedasticity of sensor noise and micro-vibrations that corrupt grid images.
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https://hal.inria.fr/hal-01022373
Contributeur : Frédéric Sur <>
Soumis le : jeudi 10 juillet 2014 - 12:18:46
Dernière modification le : jeudi 11 janvier 2018 - 06:25:23

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  • HAL Id : hal-01022373, version 1

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Michel Grediac, Frédéric Sur. How noise propagates from camera sensor to displacement and strain maps obtained with the grid method. ICEM16 - 16th International Conference on Experimental Mechanics, Jul 2014, Cambridge, United Kingdom. 2014. 〈hal-01022373〉

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