[filmscanners] RE: scanning 'dark brown' colours from a negative?

["Mike Brown" <mike.brown@mindblown.com>]

Sounds like a really odd problem which I haven't personally encountered I'm
pleased to say. I wonder what films / scanners you are using?

It appears that the blue and green values are transposed for the areas that
come out magenta. (Brown is composed of red and green with virtually no
blue -in R:G:B values 255:255:255 is white and 85:60:0 is brown. Magenta on
the other hand is red and blue with virtually no green.)

I assume orange isn't turning magenta so I doubt it's a mismatch between
colorimetry of the film & sensor. If you're using Vuescan you could try
tweaking the green up a bit to see if you can get an acceptable result. (And
if you're not using it download a trial from Hamrick.com. I found it much
better than the software that came with my Minolta scanner. Vuescan produces
a far more accurate colour balance, mostly due to it having presets for
different films.)

Mike Brown







> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Randall
> FitzGerald
> Sent: 13 March 2003 14:45
> To: mike.brown@mindblown.com
> Subject: [filmscanners] Re: scanning 'dark brown' colours from a
> negative?
>
>
> I have the same problem!  Anyone have any ideas?
>
> Randall
>
>
> on 3/13/03 4:25 AM, Dieder Bylsma at scanners@spacemoo.com wrote:
>
> > I've noticed in the photos that I take and scan that if there is any
> > particular type of colour that is apt to get mangled in bizarre ways
> > that it's the colour of dark brown. Most often, dead leaves, or
> > exposed dark brown soil will somehow render itself as a deep magenta
> > colour. Is there any rhyme or reason to why this would be the case?
> >
> > As I understand colours, brown really is a dark dark orange, so how
> > it gets to be a deep (and somewhat bright) magenta beats me. Any
> > ideas?
> >
> >
> >
> > Dieder
> >
> >
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