Alin Flaider wrote:
>
> John wrote:
>
> JF> That's really to be expected. Two staggered 1200dpi sensors result
> JF> in a pixel pattern rather like this:
>
> JF> * . * . * . * . * . * . *
> JF> . * . * . * . * . * . * .
>
> Actually, according to HP brochure, CCD sensors are rectangular and
> overlap by 50% of their length so there are no gaps in between (sorry
> everybody for the ASCII art, switch to text mode if it doesn't make
> sense):
>
> ---------
> | | | | |
> ----------
> | | | | |
> ---------
>
> Therefore, it should do better than Fuji's octagonal pattern.
In the extreme, maybe. But the big limitation is still that there is
only one independent measurement made at every pixel center (the '*'s),
which constrains the high-frequency response of the scanning array to
around that of a true 1700dpi scanner. If HP use more of the total
silicon area for their sensor than Fuji do for theirs that will help
with reducing high-frequency noise by eliminating some aliasing, but
it doesn't help with resolution.
--
John Francis [EMAIL PROTECTED] Silicon Graphics, Inc.
(650)933-8295 2011 N. Shoreline Blvd. MS 43U-991
(650)932-0828 (Fax) Mountain View, CA 94043-1389
Hello. My name is Darth Vader. I am your father. Prepare to die.
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