[sane-devel] backend Kodak i260 Image depth 48 bits stream. How is coded?

[jgobuzon-lm at yahoo.com]

Thank you Allan

 I was completely lost, but now I have a new course to continue digging.


--- El sáb 30-ago-08, m. allan noah <kitno455 at gmail.com> escribió:

> De:: m. allan noah <kitno455 at gmail.com>
> Asunto: Re: backend Kodak i260 Image depth 48 bits stream. How is coded?
> A: jgobuzon-lm at yahoo.com
> Cc: sane-devel at lists.alioth.debian.org, jose.chaves at sat.gob.mx
> Fecha: sábado, 30 agosto, 2008, 12:48 pm
> if you look at the taillight in the left image, i think you
> can see
> the Cr data. i've not had time to dig anymore.
> 
> allan
> 
> On Sat, Aug 30, 2008 at 12:04 PM, 
> <jgobuzon-lm at yahoo.com> wrote:
> > I'm going to test recode the left ghost image
> assuming YCbCr and YUV inclusive.
> >
> >   YCbCr to RGB
> >
> >    R = Y + 1.403*(Cr - 0.5)
> >    G = Y - 0.344*(Cr - 0.5) - 0.714*(Cb - 0.5)
> >    B = Y + 1.773*(Cb - 0.5)
> >
> >  YUV to RGB
> >
> >   R = Y + 1.140V
> >   G = Y - 0.395U - 0.581V
> >   B = Y + 2.032U
> >
> >  Just to see what will happen.
> >
> >
> > --- El sáb 30-ago-08, m. allan noah
> <kitno455 at gmail.com> escribió:
> >
> >> De:: m. allan noah <kitno455 at gmail.com>
> >> Asunto: Re: backend Kodak i260 Image depth 48 bits
> stream. How is coded?
> >> A: jgobuzon-lm at yahoo.com
> >> Cc: sane-devel at lists.alioth.debian.org,
> jose.chaves at sat.gob.mx
> >> Fecha: sábado, 30 agosto, 2008, 8:17 am
> >> On Sat, Aug 30, 2008 at 10:09 AM, m. allan noah
> >> <kitno455 at gmail.com> wrote:
> >> > i've never used photoshop CS, but i
> slapped a pnm
> >> header on top of the
> >> > raw file saying that it was 8 bit grayscale,
> 3600 x
> >> 2200, and i see
> >> > the car pretty clearly, with some weird
> stretched
> >> ghost image on top.
> >> > the ghost might be some sort of high bit
> count Y
> >> channel?
> >> >
> >> > allan
> >> >
> >>
> >> or for an even better look, try saying it is 8 bit
> >> grayscale, with
> >> 7200 x 1088. you get two very nice views of the
> car, which
> >> need to be
> >> interlaced in some fashion to get the final image.
> >>
> >> allan
> >> --
> >> "The truth is an offense, but not a sin"
> >
> > __________________________________________________
> > Correo Yahoo!
> > Espacio para todos tus mensajes, antivirus y antispam
> ¡gratis!
> > Regístrate ya - http://correo.yahoo.com.mx/
> >
> 
> 
> 
> -- 
> "The truth is an offense, but not a sin"

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