From: Milton Aupperle <milton@outcastsoft.com>
Date: November 15, 2005 1:29:57 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] Re: Unibrain Adaptor
Hi Duane;
On 15-Nov-05, at 1:06 PM, Duane wrote:
Is it my imagination or does the ideal saturation change depending on the other values I've
set, or once I find the ideal saturation for that camera is it always the same?
The Red Gain, Blue Gain and Brightness (which amplifies red, blue and green intensity) all increase or decrease the color intensity. So if you have low Red or low Blue or low Brightness then the Saturation affect will not be as noticeable as it would be with them placed at maximum value. You can get the same thing if you have an intense, largely monochromatic light source (ie Mars is largely a red monochromatic light source), which will be the same as if you had cranked the red gain to maximum.
So the best way to minimize the problem is to color balance the image first and then adjust the saturation slider to minimize the noise. And using the 4x pixel zoom will make the issue very apparent too, as it simply scales up the pixels with no interpolation or smoothing.
HTH..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1005 - 815 14th Avenue. S.W.
Calgary Alberta Canada T2R0N5
1-(403)-229-9456
www.outcastsoft.com
Thanks.
Duane
--- In Astro_IIDC@yahoogroups.com, Milton Aupperle <milton@o...> wrote:
>
> Hi Duane;
>
> On 14-Nov-05, at 12:47 PM, Duane wrote:
>
> > I will re-itterate, I AM FAR FROM BEING AN EXPERT... :)
> >
> > I just wanted to add in my prior issues with the color unibrain and
> > the red-gain...
>
> Not too be too heavy handed here, but it was the Saturation control
> not the Red gain that caused it. This only applies to the low end
> inexpensive cameras have the Saturation control. The way Saturation
> is implemented is that it uses a convolution algorithm in the
> TSLBV1501 chip set and it doesn't work very well, except to increase
> noise levels.
>
> -----SNIPPED for brevity------------
>
> Hope That helps..
>
> Milton J. Aupperle
> President
> ASC - Aupperle Services and Contracting
> Mac Software (Drivers, Components and Application) Specialist
> #1005 - 815 14th Avenue. S.W.
> Calgary Alberta Canada T2R0N5
> 1-(403)-229-9456
> milton@o...
>
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