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Article #55

Re: "Merge to HDR" in AE?

#55
From: Mylenium
Date: Mon, 30 Mar 2009 06:01
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      My thinking is that film already IS an HDR capture medium.




No, not really. In geeky computer terms, HDR means at least a 2^96 (96bpc) float precision with a value range of +/- 12, but at least +/- 3 or something like that (would have to look up the exact values). Plain film stock is 2^36 at best, and I think that only applies to high-quality 70mm, not even 35mm. A lot of the ability to recover highlights in film is more owed to the logarithmic nature the formats used and the inherent properties of the film stock itself. This is of course all debatable, especially with relation to the practical issues in a production workflow.

      But how do you do it with a lesser (cheaper!) camera without having to
      >repeat exactly everything several times?




Not at all. Since you cannot bypass the processing chips in the camera, there is no way to access the data of the sensor itself and all your output is already clamped, even if it may be 10bit. I also do not think you get that luxury with Genesis and RED. You just get 2 or 3 stops over/ under, but not full HDR ranges and still have to watch your aperture and exposure.

Mylenium
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Subject: Re: "Merge to HDR" in AE?
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