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[OM] Re: Singh Ray vario duo - first impressions

Subject: [OM] Re: Singh Ray vario duo - first impressions
From: "\"J. Van Brimmer\"" <om1md@xxxxxxxxxxxxxxxxx>
Date: Wed, 5 Nov 2008 08:36:16 -0800
Thank you, Richard & Wayne, I understand the principle of HDR now.


On Tue, Nov 4, 2008 at 3:14 PM, WayneS <om3ti@xxxxxxxx> wrote:
> At 05:50 PM 11/4/2008, Dickwrote:
>>"J. Van Brimmer" wrote:
>>> Okay, I'll humble myself and ask the dumb question. What are you guys
>>> talking about, what is HDR?
>>
>>HDR - High Dynamic Range
>>http://tinyurl.com/o3kfo
>
> Often this is achieved by combining multiple exposures, but with todays
> digital cameras, getting close to 8-9 stops of range, where the histogram
> covers a wide range, can be processed with HDR techniques.
>
> The first HDR algorithm I studied was back in the 70's, called homomorphic
> signal processing. What it does is balanced the overall background exposure
> range while preserving detail.
>
> Here was one of my attempts at it: http://tinyurl.com/564b8y
>
> But today it is often associated with extreme processing of sorts.
>
> There are a lot of potential creative options for output.
>
> Photomatix was the standard used by many people, but PS CS4
> can also do HDR blending.
>
> WayneS
>
>
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--
jv

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