Adaptive predictive image coding using local characteristics
Abstract
The paper presents an efficient adaptive predictive coding method using the local characteristics of images. In this method, three coding schemes, namely, mean, subsampling combined with fixed DPCM, and ADPCM/PCM, are used and one of these is chosen adaptively based on the local characteristics of images. The prediction parameters of the two-dimensional linear predictor in the ADPCM/PCM are extracted on a block by block basis. Simulation results show that the proposed method is effective in reducing the slope overload distortion and the granular noise at low bit rates, and thus it can improve the visual quality of reconstructed images.
- Publication:
-
IEE Proceedings: Communications Speech and Vision
- Pub Date:
- December 1989
- Bibcode:
- 1989IPCSV.136..385H
- Keywords:
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- Adaptive Control;
- Image Processing;
- Linear Prediction;
- Pulse Code Modulation;
- Signal To Noise Ratios;
- Very Large Scale Integration;
- Data Simulation;
- Matrices (Mathematics);
- Communications and Radar