Brightness and Contrast Corrections for Space-Time Stereocorrelation via Proper Generalized Decomposition - Laboratoire de mécanique et technologie
Journal Articles Mechanical Systems and Signal Processing Year : 2024

Brightness and Contrast Corrections for Space-Time Stereocorrelation via Proper Generalized Decomposition

Abstract

Stereocorrelation (SC) is a flexible, non-contact experimental tool for measuring 3D shape and surface kinematics in complex mechanical tests. The violation of gray level conservation raises the issue of convergence of SC (e.g., when local specular reflections are observed). Brightness and contrast corrections (BCCs) then become necessary. Space-time separation allows modes of the displacement, brightness, and contrast fields to be computed on the fly. The paper introduces a framework for Brightness and Contrast Corrections in Proper Generalized Decomposition stereocorrelation (BCCs-PGD-SC). It is shown that BCCs-PGD-SC improves the faithfulness of measured displacement fields and makes the identification of cracks viable from residual fields. The computational cost to include BCCs in PGD stereocorrelation is shown to be minimal within a PGD framework.
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Dates and versions

hal-04694801 , version 1 (11-09-2024)

Identifiers

  • HAL Id : hal-04694801 , version 1

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Xuyang Chang, Corentin Le Gourriérec, François Hild, Stéphane Roux. Brightness and Contrast Corrections for Space-Time Stereocorrelation via Proper Generalized Decomposition. Mechanical Systems and Signal Processing, 2024. ⟨hal-04694801⟩
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