A while ago, Agisoft added GPU support to its wonderful photogrammetry program Photoscan. Calculation speed for the various processes that can make use of it went up a lot. Great!
However, many users complained that generation of the dense clouds suddenly took much longer in the new version. I’ve seen the same thing, and how posted a few images of ridiculously long (and ever increasing) projected calculation times to Facebook. Here’s one:
Given that this was running on my new PC, 14 hours plus was a ridiculous amount of time!
Luckily, Photoscan is getting a new update very soon! Version 1.4.0 is out as a pre-release, and the comments and questions thread on the Agisoft forum site is quite active. People are reporting bugs and asking all kinds of questions – and some of them are not really 1.4.0-specific! And in one comment, the slooo.oo.oooo…….oooowww dense cloud generation popped up, too – and was answered!
“In the version 1.3.0 the number of pairs for the depth filtering has a strict threshold: 50 pairs, in the later updates the limit has been removed.”
Well, the user asked the next logical question:
“It’s there a way to adjust the limit on the newer versions?”
and got this anser: http://www.agisoft.com/forum/index.php?topic=7730.msg37170#msg37170
“You can use the following line input to the Console pane to limit the number of pairs:
Here instead of N you need to input some integer value, for example, 80. Hopefully, it would reduce the processing time considerably without any visible issues. I do not recommend to go under 50-60 pairs, though.
To return the value to the default (unlimited) value, please use “-1”:
So, there you are:
open the console window via the View –> Panes menu, and enter
Exchange the N for a suitable number and press RETURN – I have been using 80 for N and my dinosaur bones look good!
Unless you make a typo, you’ll simply see an empty line and a new prompt. GO run your dense cloud now 🙂
In my tests, calculation time dropped dramatically, and I saw no ill effects on the dense cloud.
🙂 Are you now happy? I sure am…..