Abstract
This paper presents a novel color quantization algorithm for compressed video data. The proposed algorithm extracts discrete cosine (DC) transform coefficients and motion vectors of blocks in a shot to estimate a cumulative color histogram of the shot and, based on the estimated histogram, design a color 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 signal-to-noise ratio improvement as compared with conventional video color-quantization schemes when zooming and panning are encountered in a shot.
Original language | English |
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Pages (from-to) | 270-276 |
Number of pages | 7 |
Journal | IEEE Transactions on Circuits and Systems for Video Technology |
Volume | 13 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Mar 2003 |
Keywords
- Color display
- Color palette
- Color quantization
- Compressed domain video processing
- Compressed video
- Cumulative color histogram
- DC sequence
- MPEG
ASJC Scopus subject areas
- Electrical and Electronic Engineering