On 13 Nov 2004 at 20:18, Don Sanderson wrote: > I am running my monitor at 32bit color depth, that's over 32 million > possible colors. > > **If this is correct so far continue, if not stop and correct me.
Theoretically correct but very few drivers actually display more than 24bits per pixel regardless (I have a 10bit per pixel display driver loaded (Matrox GigaColor viewer (v.1.10)) and its very difficult to see a difference of screen working in an sRGB colour space). > 1.) If the "D" has only 12 bits to describe each pixel, where do > all these thousands of colors come from? I know each pixel is one color, > is it the *converter* that figures out from adjacent pixel information how > to determine the color of EACH pixel to a resolution of many thousands > of colors? Interpolation which includes the application of gamma curves, colour space mapping, colour temperature compensation, contrast control, sharpening and noise reduction etc. :-) > 2.) I didn't know till today that PS Elements was using only 8 bit .TIFs. > Irfanview indicates that for this particular file 8 bits holds MORE color > info than the 16 bit version. Why/How? Something non-linear in the conversion process I guess. > 3.) Obviously an "8 bit" .TIF file resolves far more than 8 bits > (256 colors) per pixel and must use all of the 24 bits alloted > to each pixel to do this. (I realise these bits store other info as well.) 256 colours per colour channel for eight bits, ie 256x256x256 (16777216) possible colours, 48bit can accommodate trillions of colours. > So what is the distinction between an 8 bit and 16 bit .TIF? > Would these more accurately be called 24bit and 48bit .TIFs? > Or is this more an indication of the platform and software > requirements than the file structure? I suspect the confusion stems from the fact that in one instance the reference is to bits per colour channel per pixel and the other refers to total bits per pixel. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
