[Radiance-general] HDRI - Camera Response Curve

[Kirk Thibault]

Greg et al -

Regarding Photosphere and the creation of HDR images from multiple  
exposure LDR images:  is there any advantage to the process by using  
higher bit RAW or TIFF (12-16 bit) linear LDRs when combining them  
into an HDR, or does it not matter or actually make the process  
harder or less efficient, etc.?  Just curious.

I've been reading and rereading the Tone Mapping chapters in the new  
book trying to get a theoretical and physical basis for the machinery  
working behind the scenes in Photosphere/hdrgen.  Pretty cool stuff.

Thanks,

kirk
------------------------------

Kirk L. Thibault, Ph.D.
kthibault at biomechanicsinc.com

p.  215.271.7720
f.   215.271.7740
c.  267.918.6908

skype. kirkthibault




On Jan 9, 2006, at 12:19 PM, Jack de Valpine wrote:

> Hi All,
>
> Happy New Year first off.
>
> I am making a first pass through the "High Dynamic Range Imaging"  
> book that Greg co-authored. I am wondering about methods for  
> generating a good response curve for a given camera. The book gives  
> a variety of tips and suggestions, however I am curious about good  
> scenes.
>
> In a prior email footnote from Greg (a faq item relating to camera  
> response curves and Photosphere), he suggests shooting a scene  
> looking out a window during daytime with about 10 exposures. What  
> about shooting a controlled scene such as a Macbeth Color Checker  
> or a Kodak gray scale chart (can't remember the name of this)  
> outdoors under daytime conditions or using some type of interior  
> fixed lighting setup?
>
> -Jack
>
> -- 
> # Jack de Valpine
> # president
> #
> # visarc incorporated
> # http://www.visarc.com
> #
> # channeling technology for superior design and construction
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