[Radiance-general] Faulty fisheye HDR, DGP always 1.0

[Greg Ward]

Hi Raghu,

It looks like your HDR image header is missing the necessary view information.  Typically, this might be something like:

VIEW= -vta -vh 180 -vv 180

for a perspective such as yours.  You should be sure that your fisheye mapping corresponds to one of the standard Radiance types.

Best,
-Greg

> From: raghuram kalyanam <kalyanam at rhrk.uni-kl.de>
> Date: February 6, 2018 5:21:59 AM PST
> 
> Hi All,
> 
> I am trying to asses visual discomfort  using fisheye HDR images. We generated HDR image from a set of 360 degree LDRs and then converted to fisheye HDR ( using a custom made tools). The intension was to use these Fisheye HDRs as input to Evalglare and get DGP value. The Camera used is Ricoh Theta V 360 degree camera.
> 
> The problem I am facing is, the DGP calculated from the generated fisheye HDR with Evalglare is always 1.0. We did the calibration but I would like to have expert opinion from you people, what is going wrong with these set of images. Here is the link to the pictures.
> 
> It would be great if anyone could identify the issue.
> 
> Best Regards,
> Raghu
> 
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