Results 151 to 160 of about 1,308,420 (193)

Photorefractive time correlation filter

Optical Society of America Annual Meeting, 1990
Previous photorefractive holographic filters are limited by the response time of the material. The time correlation filter recognizes a sequence of individual temporal features which are limited only by the speed of the phase modulators in the reference and input signals.
V. Ryan, J. Khoury, C. L. Woods, M. Cronin-Golomb   +3 more
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Kernelized Correlation Filtering algorithm fused with Kalman Filter

2020 2nd International Conference on Machine Learning, Big Data and Business Intelligence (MLBDBI), 2020
The KCF algorithm updates the model by sampling each frame of the image. When the object is obscured by the object, the wrong sample will be introduced in the model update, making the tracking effect worse or even the target lost. Aiming at the above problems, KCF algorithm is fused with Kalman filter.
WANG Cheng-yun, ZHAO Zu-xing, SUN Chao, GAO Yu, ZHANG Long-yun, JIANG Yi   +5 more
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Geminal-filtered correlation spectroscopy

Journal of Magnetic Resonance (1969), 1991
Two-dimensional correlation spectroscopy has proved extremely successful for assigning NMR spectra on the basis of homonuclear spin-spin coupling. However, when the molecules under investigation become large and complex, difficulties may arise because of crowding of the cross peaks and ambiguities in the assignments.
Tobias Domke, Ping Xu, Ray Freeman
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Zero-aliasing correlation filters

2013 8th International Symposium on Image and Signal Processing and Analysis (ISPA), 2013
Traditional correlation filters are designed and implemented via the frequency domain, where the correlation of two signals may be computed efficiently. However, when the discrete Fourier transform (DFT) of length N is used, multiplication in the frequency domain results in an N-point circular correlation, rather than a linear correlation.
Joseph A. Fernandez, B. V. K. Vijaya Kumar   +1 more
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Correlation filters with controlled scale response

IEEE Transactions on Image Processing, 2006
Correlation filtering methods are becoming increasingly popular for image recognition and location. The recent introduction of optimal tradeoff circular harmonic function filters allowed the user to specify the response of a correlation filter to in-plane rotation distortion. In this paper we introduce a new correlation filter design that can provide a
Ryan A, Kerekes, B V K Vijaya, Kumar
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Gaussian–minimum average correlation energy filters

Applied Optics, 1991
Correlation filters with sharp delta-function correlation peaks [such as phase-only filters and minimum average correlation energy (MACE) filters] do not recognize images on which they are not trained. We show that the MACE filter cannot always recognize intermediate images of true class objects (e.g., aspect views or rotations midway between two ...
D, Casasent, G, Ravichandran, S, Bollapragada   +2 more
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Maximum Margin Correlation Filters

2012
Support vector machines (SVMs) and correlation filters (CFs) are popular for automatic target recognition (ATR) and other computer vision tasks. SVMs are designed to maximize the separation between two classes in some feature space. SVMs are popular for classification (determining the class-label of a target) and generalize well for targets not in the ...
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Heteroassociative correlation filter using cross-correlation enhancement

Optical Engineering, 2000
We introduce a new fixed-phase algorithm for producing an object recognition correlation filter by either enhancing or suppressing unnecessary spectrum information from selected objects. We demonstrate this approach by simulating the performance using five test images with completely dissimilar edge information.
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Multiresolution correlator analysis and filter design

Applied Optics, 1996
The concept of multiresolution optical correlators is formally introduced. A mathematical analysis is performed for a generalized multiresolution correlator that emphasizes the roles of both input and filter spatial light modulator resolutions. Conditions are derived for overlapping and nonoverlapping correlation orders.
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Quasi-interferometry with coded correlation filtering

Applied Optics, 1982
A new kind of principle is proposed to measure distorted transparent objects and specular surfaces directly. The method is based on correlation filtering of the object under study with two coded masks in noncoherent Fourier transformation. The information about the phase gradient appears in the form of fringes.
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