[sane-devel] ANNOUNCEMENT: dust removal: please test

[Hans-Peter Rangol]

Am Tue, Sep 17, 2002 at 02:26:18PM +0100 schrieb Major A:

Hi Andras,
> > I have tested duster with different more ore less dusty (and hairy, 
> > because of the cats here around ;-) ) slides, but I see no big difference
> > in the output of duster and the original rgb-scan. This ist contradictionary
> > to the log of duster:
> 
> This depends on the type of film you have. Take a look at the
> beginning of sanei_irclean.c and modify the IR_BASE and R_SLOPE
> values. The values give a threshold for the infrared channel according
> to
> 
>   ir-threshold = IR_BASE + R_SLOPE * red-value
> 
> where everything is normalized to 16-bit values (0..65535).

I have seen it and have chosen the E6 definitions, because I was scanning
from Kodak Ektachrome 100 slides. (Those are E6-type films, aren't they?)

How can I estimate the parameters for a film? There is no possibility to 
set infrared-values in xsane with the coolscan2 backend.

thx,

hp rangol