I've just finished some analysis of a similar problem, and wrote it up in my
thread on
Hugin Slowness...
Bottom line: I believe there's a problem in the area of control point
management.
I compared two panos:
- both are 48bit TIF panos, approx 90MB per file
- one has ~150 images, the other ~50 images
- both are multi-row panos, LDR
- the 50 image pano has 1600 ctl points
- the 150 image pano has 13k ctl points
The 50 image pano is sluggish. The 150 image pano is painful:
- File Save or Save-As is horribly slow. Takes minutes of CPU; *NO DISK ACCESS.*
- Every change to the control point list takes a minute or more (delete,
insert, etc)
- About a minute delay per action in the Mask tab
- (Fast) preview and crop tabs are slow. Layout tab feels like a hang. I didn't
bother
timing it
I'm guessing the control point management system is based on a simple yet
rather
inefficient algorithm. I've not yet dug into the code.
In your situation with 22k control points, it will be even slower.
blessings,
pete
On 21 Jun 2010 Nicolas Pelletier said...
>I mostly run command line, but every now and then, I get a very slow
>optimization run. The one I just stopped (good timing) was at loop 29 when I
>left this morning and was at 30 when back home. So did a loop in about 9
>hours.
>
>About one CPU running steadily. Will rerun with less control points (current
>one has about 22000 for 72 images in stacks of 9.
>
>nick
>
>On Mon, Jun 21, 2010 at 4:42 PM, Bruno Postle <[email protected]> wrote:
>
>> On Mon 21-Jun-2010 at 10:37 +0200, Markus Kuehni TRILAB wrote:
>>
>>>
>>> It detected control points fine (55'035) and now "hangs" for 30 straight
>>> CPU-hours at "Determining placement of the images". No disk IO taking
>>> place.
>>> (i7 620M at boosting 3.33 GHz).
>>>
>>
>> I can't be sure what the problem is, but optimisation shouldn't take this
>> long.
>>
>> I hope you saved the project before optimisation, can you upload the .pto
>> file somewhere so we can have a look?
>>
>> --
>> Bruno
--
You received this message because you are subscribed to the Google Groups
"hugin and other free panoramic software" group.
A list of frequently asked questions is available at:
http://wiki.panotools.org/Hugin_FAQ
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at http://groups.google.com/group/hugin-ptx
