Results 11 to 20 of about 123,647 (323)
Discrete cosine transforms on quantum computers [PDF]
ISPA 2001. Proceedings of the 2nd International Symposium on Image and Signal Processing and Analysis. In conjunction with 23rd International Conference on Information Technology Interfaces (IEEE Cat. No.01EX480), 2002 A classical computer does not allow to calculate a discrete cosine transform on N points in less than linear time. This trivial lower bound is no longer valid for a computer that takes advantage of quantum mechanical superposition, entanglement, and interference principles.
Klappenecker, Andreas, Roetteler, Martin
semanticscholar +6 more sources
Fast and numerically stable algorithms for discrete cosine transforms [PDF]
, 2005 In this paper, we derive fast and numerically stable algorithms for discrete cosine transforms (DCT) of radix-2 length which are based on real factorizations of the corresponding cosine matrices into products of sparse, (almost) orthogonal matrices of ...
G. Plonka, M. Tasche
semanticscholar +2 more sources
Directional Discrete Cosine Transforms for Image Coding [PDF]
IEEE International Conference on Multimedia and Expo, 2006 Nearly all block-based transform schemes for image and video coding developed so far choose the 2-D discrete cosine transform (DCT) of a square block shape.
B. Zeng, Jingjing Fu
semanticscholar +2 more sources
Image redundancy reduction for neural network classification using discrete cosine transforms [PDF]
Proceedings of the IEEE-INNS-ENNS International Joint Conference on Neural Networks. IJCNN 2000. Neural Computing: New Challenges and Perspectives for the New Millennium, 2000 High information redundancy and strong correlations in face images result in inefficiencies when such images are used directly in recognition tasks. In this paper, discrete cosine transforms (DCT) are used to reduce image information redundancy because ...
Z. Pan, A. Rust, H. Bolouri
semanticscholar +3 more sources
Directional Discrete Cosine Transforms: A Theoretical Analysis [PDF]
IEEE International Conference on Acoustics, Speech, and Signal Processing, 2007 Nearly all block-based transform techniques developed so far for image and video coding applications choose the 2-D discrete cosine transform (DCT) of a square block shape.
Jingjing Fu, B. Zeng
semanticscholar +2 more sources
On the Use of Discrete Cosine Transforms for Multicarrier Communications [PDF]
IEEE Transactions on Signal Processing, 2012 In this correspondence, the conditions to use any kind of discrete cosine transform (DCT) for multicarrier data transmission are derived. The symmetric convolution-multiplication property of each DCT implies that when symmetric convolution is performed ...
F. Cruz–Roldán +5 more
semanticscholar +3 more sources
Unified parallel lattice structures for time-recursive discrete cosine/sine/Hartley transforms [PDF]
IEEE Transactions on Signal Processing, 1993 [[abstract]]The problems of unified efficient computations of the discrete cosine transform (DCT), discrete sine transform (DST), discrete Hartley transform (DHT), and their inverse transforms are considered.
K. Liu, C. Chiu
semanticscholar +2 more sources
Possibilities of Using Several Discrete Transforms for the Video Compression [PDF]
Radioengineering, 2000 This paper treats of compression of digital video signals and the mainaim is to probe the possibility of using several discrete transformsbesides well-known discrete cosine transform (DCT).
I. Chromy
doaj +3 more sources
Real-time fluid simulation using discrete sine/cosine transforms [PDF]
ACM Symposium on Interactive 3D Graphics and Games, 2009 Recent advances in fluid simulations have yielded exceptionally realistic imagery. However, most algorithms have computational requirements that are prohibitive for real-time simulations.
B. Long, E. Reinhard
semanticscholar +2 more sources
Scripts for Discrete Cosine Transforms, Model fitting analyzes and BAMM analyzes of evolutionary phenotypic rates [PDF]
, 2021 Scripts for Discrete Cosine Transforms, Model fitting analyzes and BAMM analyzes of evolutionary phenotypic ...
Manuel Ignacio Stefanini
core +1 more source