Exporting HDR in PTGUI

[phil E]

I recently created a panorama in PTGUI with 36 images and when exporting to 10000 x 5000 hdr it took 1 hour and 30 minutes.  I checked my my computer when it was doing this and my processor was on 2-3% and the RAM was on 90%, can you tell me if this is normal?

Thanks 

Phil

[Willy Kaemena GM]

Unfortunately I would consider this "normal" for PTgui, a reason that I use  different programs to generate the HDR or exposure fused images prior to the stitching in PTgui. I could recommend to look at Photomatix  or something like HDR Express. Beside of being much more faster, these programs have full control over the HDR process.

Willy

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[Erik Krause]

Most likely PTGui is swapping to disk. Did you by chance specify an
external or otherwise slow drive for Temporary Folders (in Tools ->
Options -> Folders & Files)? If not, look in Options -> Advanced and
eventually reduce the number of simultaneous threads. Disk I/O is the
bottleneck if you have little RAM and the situation gets worse if more
threads want to access the disk all at once. The Joergen Geerds rule
applies: "As a general rule of thumb, each ptgui thread requires about
75MB/sec IO speed to your scratch disk"

See http://www.ptgui.com/support.html#2_15 and following for details.

--
Erik Krause
http://www.erik-krause.de

[phil E]

willy

 

if i use another program to create the hdr (like enfuse) of the 4 x 8mm shots and the nadir, if i put them into ptgui to stich how do i export that result in hdr format as i need the biggest file size possible

 

phil

[Willy Kaemena GM]

why do you need as an final OUTPUT an HDR format??  for me  the HDR ( .exr  or .hdr )format is only an intermediate step often not even saved, because I want to have a good looking panorama after the tonemapping.

Willy

[phil E]

my client requires the 360 with the nadir insert provided in the hdr format, if i convert all 5 images using enfuse  and then load into ptgui i cant export the rsult into .hdr file ,can i , any ideas how this can be done?

On Thursday, January 24, 2013 4:30:23 PM UTC, phil E wrote:

[Erik Krause]

Am 24.01.2013 23:44, schrieb phil E:
> if i use another program to create the hdr (like enfuse)

enfuse doesn't create HDR format, it reduces dynamic range in order to
be viewed on a normal monitor.

> of the 4 x 8mm
> shots and the nadir, if i put them into ptgui to stich how do i export that
> result in hdr format as i need the biggest file size possible

You have three ways to go:
1. use an external program to merge to HDR, save in an HDR format (.hdr,
.exr, .tif with 32bit float). Then load into PTGui and stitch. 2. you
load all your images in PTGui, enable HDR stitching and True HDR (not
exposure fusion) on Exposure / HDR tab.
In both cases you can choose the HDR output format on Create Panorama tab.
3. You stitch any exposure step to an individual panorama using the
first one as template for the others (without optimizing again). This
way you get an exposure bracketed seriesn of the whole panorama. Then
merge to HDR in an external program.

If you'd read the FAQ at http://www.ptgui.com/support.html as I
recommended earlier you'd know all that already...