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Articles by Pascal Picart
Unsupervised speckle denoising in digital holographic interferometry based on 4-f optical simulation integrated cycle-consistent generative adversarial network
The speckle noise generated during digital holographic interferometry (DHI) is unavoidable and difficult to eliminate, thus reducing its accuracy. We propose a self-supervised deep-learning speckle denoising method using a cycle-consistent generative adversarial network to mitigate the effect of speckle noise. The proposed method integrates a 4-f optical speckle noise simulation module with a parameter generator.
Refocus criterion from image-plane speckle correlation in digital holographic interferometry
In digital holography and holographic interferometry, refocusing to the correct image plane can be challenging and may be obtained by various metrics. This paper proposes a digital refocus approach utilizing the linear relationship between in-plane speckle motion and defocus as a response to an induced phase gradient. The theory based on cross-correlations between pairs of intensity images reconstructed at different distances from the recording plane is discussed.
Influence of noise-reduction techniques in sparse-data sample rotation tomographic imaging
Vinoth Balasubramani, Silvio Montresor, Han-Yen Tu, Chung-Hsuan Huang, Pascal Picart, and Chau-Jern Cheng Author Affiliations Vinoth Balasubramani,1 Silvio Montresor,2,3 Han-Yen Tu,4 Chung-Hsuan Huang,1 Pascal Picart,2,3,5 and Chau-Jern Cheng1,* 1Institute of Electro-Optical Engineering, National Taiwan Normal University, Taipei 11677, Taiwan 2Le Mans Université, LAUM CNRS, UMR 6613, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France 3Institut d’Acoustique—Graduate School, Le Mans...
Noise and bias in off-axis digital holography for measurements in acoustic waveguides
Abstract This paper discusses noise and bias in the method of holographic interferometry applied to the study of acoustics phenomena. The influence of noise on the measurement of acoustic pressure is described by an analytical approach. Relationships to quantify the minimum measurable fluid density and acoustic pressure are given by taking into account the experimental parameters of the setup.
Optimal processing scheme for restoration of phase data corrupted by strong decorrelation noise and dislocations
Haiting Xia, Silvio Montresor, Rongxin Guo, Junchang Li, and Pascal Picart Author Affiliations Haiting Xia,1,2,* Silvio Montresor,2,3 Rongxin Guo,1 Junchang Li,4 and Pascal Picart2,3,5 1Yunnan Key Laboratory of Disaster Reduction in Civil Engineering, Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China 2Le Mans Université, LAUM CNRS, UMR 6613, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France 3Institut d’Acoustique - Graduate...
Digital holography and 3D imaging: introduction to the Applied Optics and Journal of the Optical Society of America A joint feature issue
Author Affiliations Tomasz Kozacki,1,* Guohai Situ,2 Liangcai Cao,3 Pascal Picart,4 and Ting-Chung Poon5 1Warsaw University of Technology, Faculty of Mechatronics, 8 Św.
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