Comparative study of the efficiency of noise-proof algorithms in improving the contrast of speckle interferograms registered by the time-average method

Name: Comparative study of the efficiency of noise-proof algorithms in improving the contrast of speckle interferograms registered by the time-average method
Keywords: speckle interferometry, algorithm, Information theory, method, interference pattern, visibility, QC350-467, Q350-390, Optics. Light, image processing

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2024Publisher:Samara National Research UniversityJournal:Computer Optics, volume 48, pages 878-888 (issn: 0134-2452, eissn: 2412-6179,

Authors: A.V. Ivchenko; A.I. Zhuzhukin;

doi: 10.18287/2412-6179-co-1455

Comparative study of the efficiency of noise-proof algorithms in improving the contrast of speckle interferograms registered by the time-average method

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Abstract

A noise-proof algorithm for post-processing of video files recorded without isolation from vibration in the optical scheme of a digital speckle interferometer with a continuous laser and a diffuse-scattering element placed in front of the object is proposed. The results of the proposed algorithm are compared with the results of the known method for processing of a video stream in real time which is based on the sequential determination of residual images with their subsequent accumulation. The possibility of the contrast improvement by 19 – 48% compared to the basic method for the resulting speckle interferograms obtained by post-processing is shown. The developed algorithm was verified during a study of natural vibration modes of the vibrating blade of a gas turbine engine.

Keywords

speckle interferometry, algorithm, Information theory, method, interference pattern, visibility, QC350-467, Q350-390, Optics. Light, image processing

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