Critically sampled graph-based wavelet transforms for image coding

Author(s):  
Sunil K. Narang ◽  
Yung-Hsuan Chao ◽  
Antonio Ortega
Robotica ◽  
1999 ◽  
Vol 17 (2) ◽  
pp. 219-227
Author(s):  
H. Zenkouar ◽  
A. Nachit

Image compression is essential for applications such as transmission of databases, etc. In this paper, we propose a new scheme for image compression combining recursive wavelet transforms with vector quantization. This method is based on the Kohonen Self-Organizing Maps (SOM) which take into account features of a visual system in both space and frequency domains.


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