A Spatial Filtering Technique for MSS Unsupervised Classification Problems

Abstract: Overlapping of two or more grating structures of small frequency differences gives rise to the Moiré patterns. While the overall moiré patterns are widely studied, in many cases – specially in case of a zonal fringe analysis – zone or direction based highlighting or suppression of moiré patterns are very helpful. This paper presents a simple method for directional boosting of moiré patterns, generated using Spatial Light Modulator (SLM) based interferometric setup, using the spatial filtering technique. Keywords: Moiré, Spatial Filter, Directional Boosting, Interferometry, Spatial Light Modulator, Optics

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Beamforming-inspired Spatial Filtering Technique for Intracardiac Electrograms

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) ◽

10.1109/embc.2019.8857194 ◽

2019 ◽

Author(s):

Simanto Saha ◽

Dominik Linz ◽

Prashanthan Sanders ◽

Mathias Baumert

Keyword(s):

Spatial Filtering ◽

Filtering Technique

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Measurements of stress anisotropy in fiber preform: modification of the dynamic spatial filtering technique

Applied Optics ◽

10.1364/ao.27.004117 ◽

1988 ◽

Vol 27 (19) ◽

pp. 4117 ◽

Cited By ~ 10

Author(s):

Wacław Urbańczyk ◽

Kazimierz Pietraszkiewicz

Keyword(s):

Spatial Filtering ◽

Fiber Preform ◽

Stress Anisotropy ◽

Filtering Technique

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Separation of Additive and Subtractive Moire´ Patterns

Journal of Applied Mechanics ◽

10.1115/1.3408753 ◽

1971 ◽

Vol 38 (1) ◽

pp. 266-269 ◽

Cited By ~ 4

Author(s):

J. A. Clark ◽

A. J. Durelli

Keyword(s):

Experimental Determination ◽

Spatial Filtering ◽

Partial Derivatives ◽

Moire Patterns ◽

Filtering Technique ◽

Indicial Equation ◽

Moiré Patterns

Using a spatial filtering technique, moire´ patterns can be observed that correspond to different forms of the indicial equation describing the parametric properties of gratings and moire´. In particular both the additive and subtractive moire´s are obtained individually over the field. This method, combined with a previously developed method for obtaining spatial partial derivatives from deformed gratings, permits the experimental determination of the whole field of Cartesian shears and rigid rotations.

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