Title :
A visual model for subband image coding
Author :
Fong, W.C. ; Chan, S.C. ; Ho, K.L.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
fDate :
31 May-3 Jun 1998
Abstract :
In this paper, we propose a visual model for the general subband coding system. This model is a generalization of Watson´s visual model for DCT. Based on this model, a new perceptual distortion is proposed which can be used together with an efficient bit allocation algorithm to determine the quantizer stepsizes of subband coders. Simulation results and subjective viewing tests demonstrate that the proposed approach is very effective in improving the subjective quality of the encoded image at low bit rate
Keywords :
image coding; quantisation (signal); Watson´s visual model; bit allocation algorithm; bit rate; encoded image; perceptual distortion; quantizer stepsizes; subband image coding; subjective viewing tests; visual model; Bit rate; Brightness; Discrete cosine transforms; Equations; Frequency domain analysis; Humans; Image coding; Masking threshold; Testing; Visual system;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.698803
