Coherent optically performed operations in a 4d compound space-spatial frequency domain with applications in image analysis and quality control

Helmut G. Glunder; Richard Bamler

doi:10.1117/12.935302

Coherent optically performed operations in a 4d compound space-spatial frequency domain with applications in image analysis and quality control

Helmut G. Glunder, Richard Bamler

TUM Emeriti of Excellence

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Two ways of representing 2D signals as 4D spectrograms and their relation to the Wigner Distribution Function (WDF) are discussed. Some methods for their coherent optical generation and suitable display, e.g. partially sampled, are given. Furthermore it is shown how the Local Power Spectra (LPS) representation serves for the computation of a kind of texture gradient and how the Spectral Power Excerpts (SPE) represenation proved to be useful in automatic interferogram evaluation.

Original language	English
Pages (from-to)	207-215
Number of pages	9
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	397
DOIs	https://doi.org/10.1117/12.935302
State	Published - 26 Oct 1983

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AB - Two ways of representing 2D signals as 4D spectrograms and their relation to the Wigner Distribution Function (WDF) are discussed. Some methods for their coherent optical generation and suitable display, e.g. partially sampled, are given. Furthermore it is shown how the Local Power Spectra (LPS) representation serves for the computation of a kind of texture gradient and how the Spectral Power Excerpts (SPE) represenation proved to be useful in automatic interferogram evaluation.

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Coherent optically performed operations in a 4d compound space-spatial frequency domain with applications in image analysis and quality control

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