Journal ArticleDOI
Video compression using 3D wavelet transforms
A.S. Lewis,G. Knowles +1 more
TLDR
This letter has found that using the wavelet transform in time and space, combined with a multiresolution approach, leads to an efficient and effective method of compression.Abstract:
This letter present results on using wavelet transforms in both space and time for compression of real time digital video data. The advantages of the wavelet transform for static image analysis are well known.2 We have found that using the wavelet transform in time and space, combined with a multiresolution approach, leads to an efficient and effective method of compression. In addition, the computational requirements are considerably less than for other compression methods, and are more suited to VLSI implementation. Some preliminary results of compression on a sample video will be presented.read more
Citations
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Journal ArticleDOI
Image compression using the 2-D wavelet transform
A.S. Lewis,G. Knowles +1 more
TL;DR: The 2-D orthogonal wavelet transform decomposes images into both spatial and spectrally local coefficients and gave high to acceptable quality reconstruction at compression ratios for the Miss America and Lena monochrome images.
Journal Article
Study and comparison of various image edge detection techniques
TL;DR: This paper has compared several techniques for edge detection in image processing and found that the most efficient and scalable approach is the one that focuses on directly detecting the edges of an image.
Journal ArticleDOI
Video shot boundary detection: Seven years of TRECVid activity
TL;DR: An overview of the TRECVid shot boundary detection task, a high-level overview ofThe most significant of the approaches taken, and a comparison of performances are presented, focussing on one year (2005) as an example.
Patent
Data compression and decompression
TL;DR: In this article, a wavelet decomposition is used to generate the wavelet and to reconstruct data values close to the original data values, and the forward and inverse quasi-perfect reconstruction transforms utilize special filters at the boundaries of the data being transformed and or inverse transformed.
Journal ArticleDOI
In-band motion compensated temporal filtering
Yiannis Andreopoulos,Adrian Munteanu,Joeri Barbarien,Mihaela van der Schaar,Jan Cornelis,Peter Schelkens +5 more
TL;DR: A novel framework for fully scalable video coding that performs open-loop motion-compensated temporal filtering (MCTF) in the wavelet domain (in-band) is presented, and inspired by recent work on advanced prediction techniques, an algorithm for optimized multihypothesis temporal filtering is proposed.
References
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Journal ArticleDOI
A theory for multiresolution signal decomposition: the wavelet representation
TL;DR: In this paper, it is shown that the difference of information between the approximation of a signal at the resolutions 2/sup j+1/ and 2 /sup j/ (where j is an integer) can be extracted by decomposing this signal on a wavelet orthonormal basis of L/sup 2/(R/sup n/), the vector space of measurable, square-integrable n-dimensional functions.
Journal ArticleDOI
Orthonormal bases of compactly supported wavelets
TL;DR: This work construct orthonormal bases of compactly supported wavelets, with arbitrarily high regularity, by reviewing the concept of multiresolution analysis as well as several algorithms in vision decomposition and reconstruction.
Journal ArticleDOI
Decomposition of Hardy functions into square integrable wavelets of constant shape
A. Grossmann,J. Morlet +1 more
TL;DR: In this article, the authors studied square integrable coefficients of an irreducible representation of the non-unimodular $ax + b$-group and obtained explicit expressions in the case of a particular analyzing family that plays a role analogous to coherent states (Gabor wavelets) in the usual $L_2 $ -theory.
Proceedings ArticleDOI
Sub-band coding of images
John W. Woods,Sean O'Neil +1 more
TL;DR: An extension of sub-band coding to two-dimensions with particular application to images by employing a 16 band decomposition using a tree structure of separable quadrature mirror filters and decimators.