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Re: filmscanners: Re: filmscanners: autolevels was re: filmscanners: Vues can blue anomaly



At 01:21 PM 7/26/01 +1000, Rob Geraghty wrote:

>Rafe wrote:
>>With white point, it's important *not* to use 
>>a specular highlight -- eg., a reflection of 
>>the sun off of a shiny surface.
>
>But if that's the only area that could be described as white, what *should*
>you use? :-7


Find the next-whitest thing, and make appropriate 
allowances.  When you set white/black points with the 
droppers, you can make the RGB value anything you want to.

This is not a huge problem in practice.  I can almost 
always find a decent black point and white point in 
every image.  This is actually a notion that predates 
digital imaging by many decades.


rafe b.





 




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