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cfezw

$ \bigcirc$Name


cfezw Compress a color fimage with EZW algorithm




$ \bigcirc$Command Synopsis


cfezw [-r NLevel] [-e EdgeIR] [-b ImpulseResponse2] [-n FilterNorm] [-w WeightFac] [-d] [-R TargetRate] [-G Greenrate] [-B Bluerate] [-P TargetPSNR] [-c Conv] [-s SelectArea] [-o Cimage] Image ImpulseResponse [Cfimage ]



-r NLevel : Number of level for wavelet tranform

-e EdgeIR : Impulse reponses of edge and preconditionning filters (orthogonal transform)

-b ImpulseResponse2 : Impulse response of filter 2 (biorthogonal transform)

-n FilterNorm : Normalization mode for filter bank

-w WeightFac : Scaling factor for wavelet coefficients

-d : Computes distorsion-rate function

-R TargetRate : Target total rate

-G Greenrate : Portion of target Rate for green channel (percentile)

-B Bluerate : Portion of target Rate for blue channel (percentile)

-P TargetPSNR : Target PSNR

-c Conv : 0 : convert from RGB to YUV

-s SelectArea : Polygonal regions to be encoded with a different rate or PSNR

-o Cimage : Output compressed Image

Image : Input image

ImpulseResponse : Impulse response of inner filters

Cfimage : Output quantized image




$ \bigcirc$Function Summary


void cfezw (NumRec , Edge_Ri , Ri2 , FilterNorm , WeightFac , DistRate , Rate , GRate , BRate , PSNR , Conv , SelectedArea , Output , Image , Ri , QImage )

int *NumRec ;

Fimage Edge_Ri ;

Fsignal Ri2 ;

int *FilterNorm ;

float *WeightFac ;

int *DistRate ;

float *Rate ;

float *GRate ;

float *BRate ;

float *PSNR ;

int *Conv ;

Polygons SelectedArea ;

Cimage Output ;

Cfimage Image ;

Fsignal Ri ;

Cfimage QImage ;




$ \bigcirc$Description


This module compresses a color floating point image using Shapiro's EZW algorithm [Sha93] applied to its orthogonal/biorthogonal wavelet transform.

It simply compresses separately the three channels of color R,G and B. Therefore, please see the module fezw for details.




$ \bigcirc$See Also


cfchgchannels, fezw.




$ \bigcirc$Version 1.21


Last Modification date : Thu Nov 29 20:23:57 2001


$ \bigcirc$Author


Jean-Pierre D'Ales






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Next: cfiezw Up: Reference Previous: Cfezw   Contents   Index
mw 2004-05-05