>For specific examples of how this can be used, see >http://medical.nema.org/dicom/2001.html/01_14PU.PDF or Barten's book >Contrast Sensitivity of the Human Eye and Its Effects on Image Quality > >Then follow the references to track down other major researchers on this >topic. > >R Horn
I found the correct link at http://medical.nema.org/dicom/2001/01_14PU.PDF Thank you for the information. As I'm working on medical viewers people often ask me how many gray scales are needed. Some people even doubt that more than 8 Bit (256) gray scales are necessary. But typical radiological images often come with 10 Bit (1024) gray scales. If you have a display and a video card that can display distinguishable 1024 grays that would be invaluable. BTW I have read that Matrox's Parhelia supports "Gigacolor" with 10 bit per color channel. And Martox claims that you can view over 1 billion colors (it was "über eine Milliarde" in German, that's one billion in American English, isn't it?). And Sun's XVR 1000 has a 30 bit color deep frame buffer, but that's for Sparcs only. My investigations in OpenGL have revealed that there is a graphics format that supports 10 bit per color channel and 2 bit for the alpha channel, that is 32 bit altogether. So I don't know whether that can be used for the framebuffer and how drivers could support that. Detlef _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
