[sane-devel] Bleedthrough (was brightness/contrast/gamma LUT ideas?)

[Jim McQuillan]

Martin Collins wrote:
> On Mon, 10 Jul 2006 19:55:23 -0400
> Jim McQuillan <jam at McQuil.com> wrote:
>
>   
>> i've found that documents printed on 20lb paper are getting some
>> "bleed through". That is, the scan of the front is actually showing
>> some of the stuff that is on the back of the page.
>>     
> ...
>   
>> I'm thinking that if I could reduce the brightness of the light, it
>> may not bleed through so badly.
>>     
>
> Maybe, but I think you will get better results by using a black
> backing. It's a puzzle to me why so many scanners use white backing.
>   

Sorry, but I don't understand what you mean by 'black backing'. Could 
you please explain?

Thanks, Jim.

> Martin
>
>