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Re: [Openexr-user] Using OpenEXR to create HDRI images?


From: Florian Kainz
Subject: Re: [Openexr-user] Using OpenEXR to create HDRI images?
Date: Fri, 20 May 2005 18:11:14 -0700
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040114

Converting an image file to OpenEXR format will not add new information
that wasn't already in the original file.  If you convert a JPEG file
to OpenEXR, then you can change the exposure within the viewer, but
you won't see anything that you couldn't see by viewing the JPEG image
directly.  OpenEXR is a file format, not an image enhancement tool.

Most of the OpenEXR sample images were generated by combining multiple
exposures.  A few images were shot with a special high-dynamic-range
camera; the rest are computer-generated.

Florian



R. Chamberlain wrote:
Hi,

This is a quote on the OpenEXR page :

"You can reveal more detail in OpenEXR images by changing the exposure using
the Exposure slider."

My question is if I take one photo and then adjust the exposure within the
OpenEXR viewer can I create "real" HDRI images without taking multiple
photos? Or will this not capture the full dynamic range like taking a
traditional HDRI.

Thanks,

rpc212



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