0000000000671386

AUTHOR

Yves Candau

showing 3 related works from this author

Regularization Method in Infrared Image Processing

2003

Abstract Infrared images often present distortions induced by the measurement system. Thus, image processing is a vital part of infrared measurements. A distortion model based on a convolution product is presented. Image restoration is an ill-posed problem and its solution can be obtained using regularization methods. In this paper, image restoration is performed using a variation of Tikhonov regularization that makes use of the particular form of the convolution kernel matrix, which is built as a block-circulant matrix that admits a diagonal form in the two-dimensional Fourier space. The restoration procedure is used to restore a knife-edge infrared source image.

Tikhonov regularizationKernel (image processing)Diagonal formbusiness.industrySystem of measurementFrequency domainImage processingComputer visionArtificial intelligencebusinessRegularization (mathematics)Image restorationMathematicsIFAC Proceedings Volumes
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Focal plane array infrared camera transfer function calculation and image restoration

2004

Infrared images often present distortions induced by the measurement system. Image processing is thus an essential part of infrared measurements. A distortion model based on a convolution product is presented. The analytical form of the convolution kernel has been obtained from an image formation theory, along with an analysis of the sampling of the focal plane array camera detector's matrix. Image restoration is an ill-posed problem, and its solution can be obtained using regularization methods. In this work, image restoration is performed using a variation of Tikhonov regularization that makes use of the particular form of the convolution kernel matrix, which is built as a block-circulant…

DiffractionImage formationDiagonal formComputer sciencebusiness.industryDetectorGeneral EngineeringImage processingRegularization (mathematics)Atomic and Molecular Physics and OpticsConvolutionTikhonov regularizationMatrix (mathematics)Cardinal pointKernel (image processing)DistortionComputer visionArtificial intelligencebusinessImage restorationOptical Engineering
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Improvement of building wall surface temperature measurements by infrared thermography

2005

By using quantitative thermal scanning of building surface structures, it is possible to access the temperature field. For further calculation of the heat flux exchanged by these structures with the environment, one must quantify as finely as possible the temperature field on the bodies surfaces. For this purpose we have to take into account that real bodies are not black, which implies that a part of the ambient radiation received by the infrared camera detectors is reflected radiation. In this paper, we present a method to quantify the reflected flux by using an infrared mirror, which allows large surface temperature measurements by infrared thermography under near-ambient conditions with…

Materials sciencebusiness.industryInfraredCondensed Matter PhysicsTemperature measurementAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsOpticsHeat fluxThermocoupleThermal infrared spectroscopyHeat transferThermographyInfrared detectorbusinessInfrared Physics & Technology
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