nathan rutman wrote:
>
>But so far, it just looks like everyone (FBx30P, Microtek, Primax) does a
>post-scan software-based linear correction. Does anyone know what other
>scanners use the LM9830? Anyone else use these specific features?
>
The HP4200 is another LM9830 based scanner -->
htt
Gday,
>
> Anyone's scanner do something similar? Got code or math I can steal?
>
The FB330P/FB630P behave the same way, and probably have the same CCD
sensor. If you can understand Simon's code, then feel free to use it. The
adjust_output() method in canon_pp-dev.c is probably most useful for
The HP 6200 has some "internal scan area", too. But this is probably
common technique. Another question is whether the gain and offset
tables are readable or even writeable for the user. Some modern scanners
like the Canon FS2710 film scanner seem to keep the gain control private
and let all fine t
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On Monday, 5. November 2001 22:33, you wrote:
> Thinking about the calibration routine for my scanner (Canon FB630U),
> seems to me this is probably a common issue.
>
> There's a black and a white scannable area inside the housing of my
> scanner. It
sta...@guarana.org said:
> The FB330P/FB630P behave the same way, and probably have the same CCD
> sensor. If you can understand Simon's code, then feel free to use it.
> The adjust_output() method in canon_pp-dev.c is probably most useful
> for your purposes. It takes an RGB-ified image block a
Thinking about the calibration routine for my scanner (Canon FB630U),
seems to me this is probably a common issue.
There's a black and a white scannable area inside the housing of my
scanner. It looks like I need to convert scans of these areas under 3
different lighting conditions into the per-
