[gdal-dev] ECW codec compression question

[chalda]

Hello,

I have question about setting of compression of the ECW codec. I have 
read the article on the page http://www.gdal.org/frmt_ecw.html and there 
is said that option TARGET=percent sets size reduction as a percentage 
of the original image.

I'm using the ECW codec through gdal_translate by this comma
gdal_translate -of JP2ECW -co "TARGET=10" input_image.tif out_image.jp2

But when I'm changing the number option of the TARGET then no change of 
quality or the size of the image occurs. Or better the changes begins 
around the number 50 but before all options 0-50 returs the same 
"quality results".

By the mentioned page that shouldn't be correct. Could somebody explain 
me please what how the quality option works here?

Thanks a lot
Ondrej Chaloupka