[Radiance-general] sky mapping

[Lars O. Grobe]

Hi!
>
> It seems to work fairly well (the error at the centre is about 1% of
> the original image) but
>
> 1) a bright circle forms along the horizon
>
> 2) the remapped image is constantly less bright than the original one
>
It would be nice if you could share the scene as well as the resulting
image by e.g. uploading it to a web oder ftp server. Please not by
posting any attachments.. If you have a bright ring in the result - do
you have a bright ring in your source image, e.g. at the edge of the
image circle? How did you prepare the image, do you crop it? Does the
cal-file expect a 180 fov. and does your image provide that?

Under 2) you write that the image is less bright then the original, but
at the centre you have only an error of 1% - do you have a constant
error of 1%?

Are you sure that the fisheye projection assumed by the script assumes
your camera/lens projection?

Does the source image include direct sun (visible)?

Cheers, Lars.