[HDRI] Relationship - Outdoor illumination value, HDR pixel value, ISO, Shutter Speed and fstop

[Thomas Bleicher]

Brajesh.

You can find information about camera calibration on this site:

http://luxal.dachary.org/webhdr/calibrate.shtml

You have to find the response curve for your individual camera.
With this you can create reasonably accurate HDR images that
could be compared with each other.

Because of the image manipulation that goes on inside of a
digital (consumer) camera, I doubt there is a straight forward
relationship between two picture taken by different cameras.


Thomas


On Sat, Jul 4, 2009 at 8:46 PM, Brajesh Lal<brajeshlal at yahoo.com> wrote:
> Hi
> Two different cameras are used for taking the same scene at same time and
> same day.   If we know the each camera ISO value, shutter Speed and f-stop
> value and the HDR pixel value of the images produced by them then what is
> the relationship between them with respect to captured outdoor scene
> radiance value or how one can compare the radiance value captured by both
> camera. I will appreciate if one can give some mathematical relationship or
> formula.
>
> Best Regards, Brajesh Lal
>
>
> _______________________________________________
> HDRI mailing list
> HDRI at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/hdri
>
>