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Subject: Re: [AE] HDR-esque technique for high-speed footage
From: Dave Bittner <dave@pixelworkshop.com>
In-Reply-To: <list-4579452@media-motion.tv>
Date: Wed, 4 Jan 2012 09:26:52 -0500
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Message-Id: <44B31A6C-5EEF-4E44-AA00-E1EF81F56BF9@pixelworkshop.com>
References: <list-4579452@media-motion.tv>
To: "After Effects Mail List" <AE-List@media-motion.tv>


On Jan 3, 2012, at 2:20PM, Brendan Bolles wrote:

> On Dec 31, 2011, at 11:13 AM, Dave Bittner wrote:
>=20
>> I've got some footage from a Photron high speed camera that's =
presented an interesting challenge to me. The camera records a sequence =
of images that have a 48 bit depth, which is a large dynamic range. On =
export to QuickTime, however, you are forced choose a bracketed range of =
8 bits. After multiple exports, I'm left with a movie that's =
underexposed, one that's properly exposed, and one that's overexposed. I =
want to combine then, HDR-style, to show the details in the highlights. =
(The footage is a series of explosions, so there's a lot going in the =
highlights.)
>=20
>=20
> This is interesting.  So when you say bracketed range, do you mean =
that you're only able to choose 1/6 of the histogram, or that you set =
your white point and it crams everything from black to that point into =
an 8-bit file?  The latter is essentially what you get from doing =
different exposures in a camera, the former would be unusual.

Yes, I'm only able to choose 1/6 of the histogram for export. It's =
strange, and not something I've ever run across.=20