www.gusucode.com > wavelet 源码程序 matlab案例代码 > wavelet/ImageCompressionAndUncompressionUsingAdvancedParametersExample.m

    %% Image Compression and Uncompression Using Advanced Parameters.
%
% This example show how to compress a jpeg image using the adaptively 
% scanned wavelet difference reduction compression method (|'aswdr'|). The
% conversion color (|'cc'|) uses the Karhunen-Loeve transform (|'kit'|).  
% The maximum number of loops (|'maxloop'|) is set to 11 and the plot 
% type (|'plotpar'|) is set to step through the compression. Show the 
% compression ratio (|cratio|) and the bit-per-pixel ratio (|bpp|), which 
% indicate the quality of the compression.
[cratio,bpp] = wcompress('c','woodstatue.jpg','woodstatue.wtc', ...
             'aswdr','cc','klt','maxloop',11,'plotpar','step');
cratio
bpp
%%
% Load the compressed image and step through the uncompression process.
wcompress('u','woodstatue.wtc','step');