Title :
A three-source multirate model for image compression
Author :
Eddins, Steven ; Smith, Mark T.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Current work in combining multirate filtering techniques with a three-source (low pass, edge, and texture) image model designed to increase control over perceptual edge quality is described. The model employs multirate subband filtering to code the low-pass source efficiently and to reconstruct the image from the sources. Spline modeling can be used to exploit the two-dimensional connectivity of the edge source. Parameters of the edge profile (edge-source values along the perpendicular direction) are chosen so that coding errors are not too perceptually objectionable. Using a two-level octave band frequency configuration and without coding the sources, the SNR is 57.0 dB, perceptually indistinguishable from the original
Keywords :
data compression; encoding; filtering and prediction theory; frequency response; picture processing; signal synthesis; 57 dB; SNR; edge source; image compression; low-pass source; multirate subband filtering; texture source; two-level octave band frequency configuration; Bit rate; Delay; Discrete cosine transforms; Filtering; Frequency; Frequency domain analysis; Image coding; Image reconstruction; Information filtering; Information filters; Spline; Transform coding;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115943
