[Radiance-general] Mapping issue with HDR files generated from TIFF

[Mostapha Sadeghipour]

Hi Greg,

That was it. Just rotated the image and it is fixed now! I should have used
a less random pattern to debug. I will update the workflow to mimic
Radiance's approach for coordinates.

Best,
Mostapha



On Fri, Aug 22, 2014 at 4:42 PM, Greg Ward <gregoryjward at gmail.com> wrote:

> Are both your images square (same number of X and Y pixels)?  Radiance has
> a somewhat peculiar way of handling rectangular images, which could cause
> scaling discrepancies.  See p. 259 of "Rendering with Radiance" for details.
>
> Cheers,
> -Greg
>
>
> *From: *Mostapha Sadeghipour <sadeghipour at gmail.com>
>
> *Subject: *[Radiance-general] Mapping issue with HDR files generated from
> TIFF
>
> *Date: *August 22, 2014 8:58:38 PM GMT+02:00
>
>
>  Hello Radiance community,
>
> I'm doing a series of experiments for using a 3rd party 3D software (in
> this case Rhino) to generate the map and render them with Radiance.
>
> I made a workflow based on Giulio's suggestion (
> http://www.radiance-online.org/pipermail/radiance-general/2005-July/002851.html),
> and it works fine when I use Radiance example .hdr files, however when I
> use a custom pattern ( generated as a tiff image) and convert it to hdr
> (ra_tiff -r) it doesn't map correctly. Looks like hdr mapping is scaled.
>
> Is there some consideration in generating the tiff file or converting it
> to hdr that I am missing. I tried to use pfilt and re-size the image to
> make sure the size is fixed but it didn't help.
>
> Here is a slide that shows the problem:
> https://www.dropbox.com/s/eklns2rv5bv6tyj/RhinoVSRadiance.jpg?dl=0
>
> Also the hdr file generated from tiff image in case it can help:
> https://www.dropbox.com/s/o293dqh04ack1hb/random_pattern_1.HDR?dl=0
>
> Thanks in advance,
> Mostapha
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20140822/8d76dfae/attachment.html>