A Hybrid Coding Scheme For Still Images : Adaptive Vector Quantization With Correction Information In Dct Domain

G . Tu; G. Verbeek; J. Rommelaere; A Oosterlinck

doi:10.1117/12.942117

18 January 1988 A Hybrid Coding Scheme For Still Images : Adaptive Vector Quantization With Correction Information In Dct Domain

G . Tu, G. Verbeek, J. Rommelaere, A Oosterlinck

Author Affiliations +

Proceedings Volume 0829, Applications of Digital Image Processing X; (1988) https://doi.org/10.1117/12.942117
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

Abstract

An adaptive image coding system is presented, in which vector auantization (VO) is implemented in the discrete cosine transformed (DCT) domain to manipulate the stationary image data according to their features. The errors resulted by VQ, viewed as non-stationarity of the data, are evaluated and an adaptive correction operation is carried out using scalar correction quatizers (SCQ). Moreover, the DC-coefficients are also vector quantized. This coding system has been simulated for natural images and an improvement of more than 3 dB is obtained in comparison to traditional DCT coding systems.

Citation Download Citation

G . Tu, G. Verbeek, J. Rommelaere, and A Oosterlinck "A Hybrid Coding Scheme For Still Images : Adaptive Vector Quantization With Correction Information In Dct Domain", Proc. SPIE 0829, Applications of Digital Image Processing X, (18 January 1988); https://doi.org/10.1117/12.942117

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