Digital BW, The Print

> From: Roy Harrington
>
> Ok.  I think it's interesting to note that it is specifically the
> mathematics of
> the linear A/D data representing the ratio of the dynamic range
> that gives rise to the need for more bits to get more dynamic range.
> E.G. with a 12 bit integer value the biggest ratio you can
> represent is 4096/1.
> If you want a larger dynamic range ratio than 4096 you have to
> have more bits.

That's not entirely true. It's certainly true for a single pixel, but the
eye doesn't see only individual pixels, it sees areas of similar pixels as
solid colors. Since there's always noise, you can see in-between values by
averaging across many pixels. That's basically what dithering is.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...