Results 241 to 250 of about 476,574 (303)

Acoustooptic matched filter correlator

Applied Optics, 1982
The signal model used and the output SNR(0) measure chosen are shown to affect the performance of an acoustooptic time-integrating correlator. Nonuniform acoustic fields are also shown to affect the results, but these error sources can be overcome with a new hybrid time- and space-integrating acoustooptic matched filter correlator that we describe and ...
D, Casasent, G, Silbershatz, B V, Kumar
openaire   +2 more sources

Wavelet filtering of correlated speckle

SPIE Proceedings, 2003
In practice, SAR images are very often disturbed by a correlated speckle noise. Correlation influence on wavelet coefficients is a difficult problem degrading detection and filtering performances dramatically. We establish a simple analytic relation between high order wavelet coefficient moments/cumulants and speckle second order statistics.
Samuel Foucher, Jean-Marc Boucher, Goze B. Bénié   +2 more
openaire   +1 more source

Correlation Filter Tracking via Distractor-Aware Learning and Multi-Anchor Detection

IEEE Transactions on Circuits and Systems for Video Technology, 2020
Correlation filter has demonstrated the power in object tracking, benefiting from its superior speed and competitive performance. However, existing correlation filter based trackers (CFTs) are fragile for some inherent defects caused by the boundary ...
Guochun Chen, Yongxin Zhou, Wenxiong Kang   +2 more
exaly   +2 more sources

Transfer learning-based discriminative correlation filter for visual tracking

Pattern Recognition, 2020
Most Correlation Filter (CF)-based tracking methods can hardly handle occlusion or severe deformation, due to the lack of effective utilization of previous target information.
Bo Huang, Tingfa Xu, Jianan Li
exaly   +2 more sources

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
openaire   +1 more source

Motion-Aware Correlation Filter-Based Object Tracking in Satellite Videos

IEEE Transactions on Geoscience and Remote Sensing
Object tracking in satellite videos poses a significant challenge for existing trackers due to the typical involvement of small objects, multiple similar disruptors, and occlusions.
Bin Lin, Jinlei Zheng, Chaocan Xue, Lei Fu, Ying Li, Qiang Shen   +5 more
semanticscholar   +1 more source

Correlation Filters for Object Alignment

2013 IEEE Conference on Computer Vision and Pattern Recognition, 2013
Alignment of 3D objects from 2D images is one of the most important and well studied problems in computer vision. A typical object alignment system consists of a landmark appearance model which is used to obtain an initial shape and a shape model which refines this initial shape by correcting the initialization errors.
Vishnu Naresh Boddeti, Takeo Kanade, B. V. K. Vijaya Kumar   +2 more
openaire   +1 more source

Quadratic correlation filters for optical correlators

SPIE Proceedings, 2003
Linear correlation filters have been implemented in optical correlators and successfully used for a variety of applications. The output of an optical correlator is usually sensed using a square law device (such as a CCD array) which forces the output to be the squared magnitude of the desired correlation.
Abhijit Mahalanobis, Robert R. Muise, Bhagavatula V. K. Vijaya Kumar   +2 more
openaire   +1 more source

Object Tracking by Branched Correlation Filters and Particle Filter

2017 4th IAPR Asian Conference on Pattern Recognition (ACPR), 2017
Correlation filter based tracking which is one of the tracking-by-detection methods, has demonstrated competitive performance in recent years. However, once the detected position is incorrect, the parameter of correlation filter is updated based on the appearance of the incorrect position.
Hitoshi Nishimura, Yuki Nagai, Kazuyuki Tasaka, Hiromasa Yanagihara   +3 more
openaire   +1 more source

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
openaire   +2 more sources