Title :
An improved zerotree wavelet image compression method
Author :
Tang, Liangrui ; Cai, Anni ; Sun, Jingao
Author_Institution :
Coll. of Eng., North China Univ. of Technol., Beijing, China
Abstract :
This paper presents some modifications on the embedded zerotree wavelet algorithm (EZW). It is based on the idea of wavelet packets by further dividing the low and high frequency subbands respectively. The importance of subbands in different scales and different orientations to the human vision are taken into account during quantization. By this method, the subjective quality of the reconstructed image is significantly improved
Keywords :
data compression; image coding; transform coding; trees (mathematics); wavelet transforms; EZW algorithm; embedded zerotree wavelet algorithm; high frequency subbands; low frequency subbands; reconstructed image quality; subjective quality; zerotree wavelet image compression; Discrete cosine transforms; Fractals; Frequency; Humans; Image coding; Image reconstruction; Low pass filters; Quantization; Wavelet packets; Wavelet transforms;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.891717
