Earlier versions of Photoshop had quite a few processes which worked in 8 bit/channel (24 bit) mode only.
Later versions included more and more processes that function in 16 bit/channel (48 bit) mode. I use version 5.5, and it still doesn't allow for filters to work in 48 bit, and several other features. The most recent versions have quite a number of features which work at 48 bit, although I don't believe everything works in that mode yet. Having said this, probably the most important areas to have 16 bit/channel functionality are things like Levels, contrast, brightness, hue, color balance, to lessen rounding off error. It is much less important in other areas. Art VC wrote: > My SS-4000 can scan at 24- or 36-bit color depth. If I scan at 24 bits > Photoshop allows me to process image. At 36-bits it tells me that processing > is not allowed or something to that effect. Does anyone know why this > prohibition? > Vasilis > > > ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body