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ICIP
2007
IEEE
14 years 3 months ago
Lifting-Based Directional DCT-Like Transform for Image Coding
Traditional 2D DCT implemented by separable 1D transform in horizontal and vertical directions does not take image orientation features in a local window into account. To improve ...
Hao Xu, Jizheng Xu, Feng Wu
ICMCS
2006
IEEE
129views Multimedia» more  ICMCS 2006»
14 years 2 months ago
Directional Discrete Cosine Transforms for Image Coding
- 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. With almost no except...
Bing Zeng, Jingjing Fu
ICWMC
2006
IEEE
14 years 2 months ago
An Overview of MAC Protocols with Directional Antennas in Wireless ad hoc Networks
Although directional antennas have been used in mobile communications systems for quite a long time, realistic applications of directional or smart antennas in wireless ad hoc net...
Hongning Dai, Kam-Wing Ng, Min-You Wu
ECCV
2006
Springer
14 years 10 months ago
Direct Solutions for Computing Cylinders from Minimal Sets of 3D Points
Efficient direct solutions for the determination of a cylinder from points are presented. The solutions range from the well known direct solution of a quadric to the minimal soluti...
Christian Beder, Wolfgang Förstner
ICALP
2003
Springer
14 years 1 months ago
A Direct Sum Theorem in Communication Complexity via Message Compression
We prove lower bounds for the direct sum problem for two-party bounded error randomised multipleround communication protocols. Our proofs use the notion of information cost of a p...
Rahul Jain, Jaikumar Radhakrishnan, Pranab Sen