[Radiance-general] Errors with Vertically Tall HDR Images

[J. Alstan Jakubiec]

Thanks everyone for the suggestions!

I'm embarrassed to report that Stephen's suggestion was correct. I did 
run vwrays the correct amount of times, but one of the views had the -vu 
and -vd directions parallel, so it only ran without crashing 55 times. I 
guess always check your inputs.

Best,

Alstan

On 8/17/2018 4:08 AM, Jan Wienold wrote:
> hi alstan,
> I saw you are using a pretty old version of radiance - do you 
> experience this also with a more recent version?
> best
> jan
>
> On 16 August 2018 04:33:10 CEST, "J. Alstan Jakubiec" 
> <alstan at jakubiec.net> wrote:
>
>     Dear Radiance friends,
>
>     (Sorry to post to the mailing list, but the Discourse server seems
>     to be down.)
>
>     I have an issue when I am working with some rather tall HDR images
>     (10,000 - 100,000 pixels tall). The application is that I am
>     running annual discomfort calculations using Jan's gen_dgp_profile
>     approach with many views on very large octrees. In this case, one
>     call to rtrace with a big vwrays output file is better than 40+ to
>     rpict where the octree needs to be loaded into memory each time. I
>     tested this in a model with 38 views and a 500 x 500 pixel output
>     per view, resulting in a 500 x 19,000 pixel image per timestep,
>     which worked great! Now I am working with a model that has 56
>     views (a 500 x 28,000 pixel image), and I get systematic errors
>     when passing the output to evalglare.
>
>     Here are the steps I am using:
>
>       * I run vwrays 56 (or n) times: vwrays -ff -vta -vv 180 -vh 180
>         -vp ... -vd ... -x 500 -y 500 >> views.rays
>       * rtrace -x 500 -y 28000 -ab 0 -lw 0.0000001 -st 0.15 -ffc
>         !oconv ... < views.rays > image.hdr
>       * I cut the output using pcompos, and pass it to evalglare:
>         pcompos -x 500 -y 500 image.hdr 0 *pixel_offset* |
>         evalglare.exe -vta -vv 180 -vh 180 ...
>           o In this case pixel_offset is 0 for the last view, -500 for
>             the second-to-last, etc.
>
>     I can extract images for every offset -500 through -27500 except
>     for the 0 offset. I get this error for the 0 offset (passing to
>     ra_bmp in this case):
>
>         image.hdr: read error (y==499)
>         ra_bmp: error reading Radiance picture
>
>     I am not sure quite what to make of this and hope that someone
>     here might have an idea. I uploaded an example image here:
>     https://www.dropbox.com/s/7gub8i4row9qmsz/image.hdr?dl=0 Is the
>     error with the render itself or with the size of the HDR?
>
>     Thank you,
>
>     Alstan
>
>
> -- 
> Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail 
> gesendet.
>
>
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