Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/1543
Title: Colour quantization of compressed video sequences based on the estimation of cumulative colour histogram
Authors: Cheung, Wan-fung
Chan, Yuk-hee
Subjects: Data compression
Feature extraction
Image colour analysis
Image sequences
Quantisation (signal)
Statistical analysis
Video coding
Issue Date: 2002
Publisher: IEEE
Source: 2002 IEEE International Conference on Multimedia and Expo : proceedings, August 26-29, 2002, Swiss Federal Institute of Technology, Lausanne, Switzerland, v. 2, p. 69-72.
Abstract: This paper presents a novel colour quantization algorithm for compressed video data. The proposed algorithm extracts DC coefficients and motion vectors of blocks in a shot to estimate a cumulative colour histogram of the shot and, based on the estimated histogram, design a colour palette for displaying the video sequence in the shot. It significantly reduces the complexity of the generation of a palette by effectively reducing the number of training vectors used in training a palette without sacrificing the quality. The palette obtained can provide a good display quality even if zooming and panning exist in a shot. The experimental results show that the proposed method can achieve a significant SNR improvement as compared with conventional video colour quantization schemes when zooming and panning are encountered in a shot.
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Type: Conference Paper
URI: http://hdl.handle.net/10397/1543
ISBN: 0-7803-7304-9
Appears in Collections:EIE Conference Papers & Presentations

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