On Wed, 2 Jun 2004 19:21:36 +0300 Jan Knutar <jknutar at nic.fi> wrote: JK> > And more, JK> > parameter "gray" decreases the quality! JK> JK> Are you refering to PSNR? No, I am refering to visual quality. With "gray" I see artifacts like black-white sand on the picture.