> Normal scanner operation is to scan one page. What I'd like to do is
> figure out how to put a scanner into some sort of "continuous" mode,
> where it scans forever, streaming data out. Then I could advance the
> film in front of the array at a suitable rate. I wonder if some
> scanners have a diagnostics mode, where you can get them to scan
> continuously?
>

Image sensors I'm familiar with integrate the pixels for a period of time,
then shift out the image. If in a continuous mode, they are shifting out
the previous set while integrating the new set. If in snapshot mode, they
integrate, then shift. If your film is moving continuously, the
integration would blur "vertical pixels." If the integration time is short
enough, this problem can be minimized.

I understand this project is for scanning 35mm microfilm. Sounds like an
interesting project! At some point, I'd like to take the old Federal
Registers, available on microfilm, and scan them to a pdf. The software
would have to figure out where one page ends and the next starts, since I
don't think you can rely on sprocket holes like you can with motion
picture film. Maybe you can?

Using data from the GPO, I've got the Federal Register back to 1996 at
http://fr.hallikainen.org/ . It'd be nice to go back further...

Harold




-- 
FCC Rules Updated Daily at http://www.hallikainen.com - Advertising
opportunities available!
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist