Re: Nikon D300 HDR out of the camera !!

Paul Furman <paul-@[EMAIL PROTECTED]
> wrote in
news:Zkszj.19705$0w.4535@[EMAIL PROTECTED]
 

> John Sheehy wrote:
>> "Charles" <charlesschuler@[EMAIL PROTECTED]
> wrote in 
>> news:LM6dnYaD4fw8ClHanZ2dnUVZ_oSunZ2d@[EMAIL PROTECTED]
>> 
>>> Reds are often blown out.  Typical of all DSLRs. 
>> 
>> That's typical of conversions.  The RAW data blows out very rarely in
>> the red channel; it is only the attempt by the converters to render
>> very saturated reds that blows them out. 
>> 
>> Many a digital photo with red flowers has been severely under-exposed
>> to prevent a blow-out, unnecessarily.
> 
> Odd that red & green are opposite on the color wheel but diagonal in a
> sensor and double the number of green pixels. <scratching head>

They're not exactly opposite.  Cyan is opposite red, and magenta is 
opposite green.

Part of the range between blue and red on a color wheel would be totally 
invisible, if it were fully saturated, as visible light does not use a 
full octave.

There is no meaning to the order of colors in the red/green*2/blue 
elements in a CFA.  The only consideration is that since there are more 
greens (probably because noise and detail in the green channel are more 
noticeable), that the greens be equally distibuted, and they can only be 
done so with such a pattern:

g*g*g*g*
*g*g*g*g
g*g*g*g*
*g*g*g*g

After you do that, the relative placement of red and blue are irrelevant, 
because the pattern is the same, just ****fted some, if you swap blue and 
red.

-- 

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   John P Sheehy         <JPS@[EMAIL PROTECTED]
>
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