[Openexr-user] Re: How to combine multiple exposed images? (Josef Grunig)

[L.Yimm]

Hi Josef,

Well....you've asked a question that could fill volumes with an 
answer,  but the basic idea is that you take a series of images that 
are shot at differing exposures (changing the shutter speed NOT the 
aperture, which causes focus problems) and combine them into one 32 
bit high dynamic range image.

There are two pieces of free software that you can use to build an 
HDR image from multiple exposures:

Greg Ward's Photosphere available for OSX here: http://www.anyhere.com/

and

Paul Debevec's HDR Shop V1 which runs on Windows available here: 
http://www.hdrshop.com/

The new version of Photoshop CS will also assemble HDR images....and 
there is a newer version of HDR Shop V2...but you will need to 
purchase both of these programs.


The HDR Shop website has a really great set of tutorials on the 
how/what/why of HDR images, I'd start there.   And then if you want 
to get into the application and use of  HDRI and Image-based 
Lighting: there's an amazing amount of reading material on Paul 
Debevec's site:  http://www.debevec.org/

This should give you a good start.

Lisa


> Hi to all,
>
> I'm a newbye to OpenEXR and would like to create my first HDR image.
> I've read that a way of creating HDR images is assembling multiple
> exposed (with different f-stops) images. I didn't find how this
> "combining" has to be done. Can you tell me more?
>
> Thanks a lot!
>
> --
> Josef Grunig
> www.blending-life.org


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