next up previous contents index
Next: fezw Up: Reference Previous: ezw   Contents   Index

Fezw

$ \bigcirc$Macro


Fezw Compresses an image with EZW algorithm




$ \bigcirc$Usage


Fezw [-R Rate] [-b1 BiFilt1] [-b2 BiFilt2] [-o OrthoFilt] [-e EdgeFilt] image


$ \bigcirc$Description


This macro compresses a 8 bits graylevel image using EZW algorithm [Sha93] applied to the orthogonal/biorthogonal wavelet coefficients. It is based on the fezw module, but is simpler to use.

One only has to specify the input image name. If the -R option is selected, then both a compressed file and a quantized image (which can be reconstructed from the compressed file) are generated. The compression is made in order to reach the target bit rate Rate. If the input image file has the form *.rim or *.img, then the compressed file is named *_Ratec.comp and the quantized image file is named *_Rateq.rim.

If the -R option is not selected, then the rate distortion curve is computed (as if the -d option was selected in fezw).

Details about wavelet transform are the same as for Fwlbg_adap macro. The reader is refered to its documentation for information about the -b1, -b2, -o and -e options.

When calling fezw module, none of the -r, -n, -w, -P and -s option is selected.


$ \bigcirc$Version 1.05


Last Modification date : Feb 12 2002


$ \bigcirc$Author


Jean-Pierre D'Ales, Jacques Froment






next up previous contents index
Next: fezw Up: Reference Previous: ezw   Contents   Index
mw 2004-05-05