Scale-, Shift-, and Rotation-Invariant Diffractive Optical Networks
نویسندگان
چکیده
منابع مشابه
Position, rotation, and scale invariant optical correlation.
A new optical transformation that combines geometrical coordinate transformations with the conventional optical Fourier transform is described. The resultant transformations are invariant to both scale and rotational changes in the input object or function. Extensions of these operations to optical pattern recognition and initial experimental demonstrations are also presented.
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Di erent signal realizations generated from a given source may not appear the same. Time shifts, frequency shifts, and scales are among the signal variations commonly encountered. Time-frequency distributions (TFDs) covariant to time and frequency shifts and scale changes re ect these variations in a predictable manner. Based on such TFDs, representations invariant to these signal distortions a...
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Diierent signal realizations generated from a given source may not appear the same. Time shifts, frequency shifts, and scales are among the signal variations commonly encountered. Time-frequency distributions (TFDs) covariant to time and frequency shifts and scale changes reeect these variations in a predictable manner. Based on such TFDs, representations invariant to these signal distortions a...
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A method for object recognition invariant under translation , rotation and scaling is addressed. The rst step of the method (preprocessing) takes into account the invariant properties of the normalized moment of inertia and a novel coding that extracts topological object characteristics. The second step (recognition) is achieved by using a Holographic Nearest Neighbor algorithm (HNN), where vec...
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ژورنال
عنوان ژورنال: ACS Photonics
سال: 2020
ISSN: 2330-4022,2330-4022
DOI: 10.1021/acsphotonics.0c01583