|
Implementation of 2D still image wavelet compression engine done during the last three months
|
Algorithm
-
Orthogonal reversible pyramid algorithm with 9-tap symmetric quadrature mirror filters
-
Zerotree quantization of transform coefficients with embedding
-
Arithmetic coder
|
Major features
-
24 bit color, 8 bit grey scale, no limit for compression ratio
-
portability: installed on IBM, SGI, Sun, DEC
-
modular structure: easy for testing
-
fully adaptive output stream: one can cut off the tail of the codestream and the rest is the same as the codestream for higher compression ratio
-
object methodology: readability and easy for introducing changes
|
|
Advantage: source available
|
|
NPAC developed wavelet compression software (Wv) of quality comparable with the best commercial solutions
|
