Hi Folks.
 
   First post here....
 
    I need some information of bigger picture issues regarding imagemodeler.   I have a large, complex archaeological site that I am trying to model, and I'm just not having any luck getting my cameras to calibrate.
 
    I've gone through the tutorials successfully, and think I have a pretty good working knowlege of the program, but I have some questions.
 
Lets say we have a big structure to model, say 10 by 20 meters in size.   The  structure is open (unroofed) and there is a nearby cliff overlooking the building so that we can get at least 2 high oblique angles on the buidling.    Some photos have been taken at ground level as well.
 
You can see the site I'm working with at http://www.centerfordesertarchaeol [...] rary/v163.
Right now I'm just working on the large square great kiva in the forground, but I hope to expand out to cover most of the site over the coming year,
 
How many images can be used in the modeling process?   How many locators should I need to use to get a calibration?   I'm trying to use about 8 images, with some 24 locators, and i'm just not getting a calibration.   I'm averaging 8-10 shared locators per image.
 
 Plus, my system is really starting to slow down once I get above 20 locators.   Is there some sort of memory limit?  I'm using a dual-proc 3ghz xenon system, 4 gigs of ram, win xp , 128 megs of video memory.....
 
Any hints, helpers or guidlines would be most appreicated..
Doug Gann
Center for Desert Archaeology

Well,  I posted this question a month ago,  and I have to say, for software that does not come with a manual, you'd think that the developers would at least be able to answer a pretty simple question regarding the functionality of their product.
 
A less than pleased  
Mr Maps.

quicker response would be nice huh, mr maps?

Hi Doug,
 
Your link to the images is dead. I imagine that is because it is so old.
 
First to help with the slow down you can go to the preferences and turn "automatically calibrate" off. This will make the interaction work better. Generally you need to do this w/ 5 or more images. After adding markers use the manual calibration button.
 
You should be able to calibrate a scene w/ 8 images but it will be chanllenging. I would recommend starting with 2 images and achieving a good calibration, adding one additional image at a time until you get all 8 calibrated. This is the only way you can keep track of where the problem is w/ this many images. I generally try to minimize the number of images I have to use in a given project, but I know sometimes many are required.
 
I think that archeology is one of the more interesting applications of photogrammetry. I got to see several examples of photogrammetry to reveal archeology info at the VAST confrence a few years ago. I would love to see what the result is when your project is complete.  
 
-Greg Downing