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Messages - jtuhtan

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Feature Requests / DHHN2016 Geoid
« on: February 11, 2019, 02:55:41 PM »

For those of us in Germany using the DJI Phantom 4 RTK, it would be great to have the German geoid (DHHN2016) as well.

Best, Jeff

General / Re: Workstation for Hire - 256 GB RAM dual 8core @2,7 GHz
« on: April 16, 2015, 10:49:52 AM »
I didn't receive a PM, can you try again?


General / Re: Import chunk into current project
« on: April 16, 2015, 10:47:40 AM »
I think what you are looking for is to "append" the chunks from one project into another one. Go to the main menu and select "Append..." This opens the chunks from another model in the current model. From there you can align and combine the chunks from two separate projects.


General / Re: Workstation for Hire - 256 GB RAM dual 8core @2,7 GHz
« on: March 28, 2015, 05:00:45 PM »

We have some larger projects where your service sounds like it might be very useful. Can you send me your email so we can discuss the details?


Feature Requests / Re: Point Cloud classification by color
« on: March 28, 2015, 02:26:03 PM »
CloudCompare has a decent point cloud classification algorithm (CANUPO). Although the algorithm it uses includes multi-scale geometrical properties of the cloud, I have used it to remove vegetation. Here is a wiki describing the classification procedure:

You can use Cloud Compare to filter and process models and point clouds (sparse or dense) from PS as well:


Feature Requests / Re: "Show/Hide Cameras" shortcut key
« on: March 28, 2015, 02:18:56 PM »
I second the motion!


General / Re: Alignment Experiments
« on: March 28, 2015, 02:15:44 PM »
Thank you for sharing this great post!

From my experience (oblique and UAV-based imagery) there are only tendencies and not fixed formulas which should be used. For instance, for many small (< 100 21 MP images) oblique models, I usually get best performance by doing the following:

1) Set the max number of key points to 1 mio to ensure that all key points are generated. (As Marcel pointed out, 21 MP images will max out at a much lower number, but 1 mio just sets the threshold to "max")
2) Set the tie points to 0
3) Remove sparse points using gradual selection at 1 px or less (Marcel used 0.5 in his tests)
4) Optimize cameras
5) Repeat steps 3-4 until the reconstruction error is minimized

Depending on the imagery, a sub-pixel error of 0.5-0.1 can be achieved for most of my models. This takes a little more time processing at the onset, but the georeferenced model at the end is usually of a very high quality.

Here is an example of a small Austrian river made using the above workflow:


General / Re: License management
« on: March 28, 2015, 02:06:57 PM »
Hi Alexey,

Thanks! We bought the Pro version and this option is very useful, better than the dongles we are used passing around for other commercial softwares!


General / Re: License management
« on: March 10, 2015, 05:45:58 PM »
We would like to purchase a Pro License but need flexibility to move from one computer to another since we often do field work and take our laptops out of the office. Is there a dongle or license management system option for AgiSoft Pro?


General / Re: Multicam Rig for Drone Aerial Photography
« on: February 05, 2015, 11:36:54 AM »
Thanks for all the input. We have a Sony NEX-6, A5000, Canon 5 M III and various other compacts. The problem is more that we have to use a lightweight platform due to the flight weight requirements, especially in Germany.

Preliminary tests with stereo Mobius were good for what we do (river mapping and modelling) so we are going ahead with the Mobius multi cam design. Right now, including 5 cameras and integrated USB hub we are looking at a total mass of 1.2 kg, which is pretty good.

I second the motion on Blender. Here is a link to a tutorial which I found helpful:

You will need to adapt the workflow a bit by exporting your Photoscan model as a bundler.out file, and will also need to create the list.txt file which is just a list of all the camera names (corresponding to the cameras in the bundler.out file).

Feature Requests / Re: Smart masking options
« on: February 02, 2015, 10:50:07 PM »
You can mask out pretty complicated regions, but this requires more advanced image processing tools than what are available from most commercial software. If you have programming experience, I would recommend taking a look first at OpenCV.

The tools required for non-trivial automated masking are image segmentation and image classification.

General / Re: Multicam Rig for Drone Aerial Photography
« on: February 02, 2015, 10:42:04 PM »
Sure, but the difference is made up when you can replace multiple flights with a single flight with "total coverage". We fly at a max 100m, so the resolution is not as critical as the image quality and sparse points / flight. Has anyone out there tried a stereo or multicam system on UAVs?

General / Re: Using a GoPro & Photoscan
« on: January 28, 2015, 04:28:51 PM »
One quick comment when using any fish eye lens:

If the distance between images is too close (< 1m), SfM software may have a hard time calculating the camera positions and orientations correctly. If you are doing any type of low-altitude imagery (< 20m), you probably only need to use every third image or so...

General / Multicam Rig for Drone Aerial Photography
« on: January 28, 2015, 04:23:18 PM »
I've been working on building a low-cost multicamera rig loosely based on the Leica RCD30 oblique.

The system includes five Mobius action cams (normal, not wide-angle) which share a common power supply and trigger.

Attached is a pdf of the preliminary rig design. I was hoping to get some feedback or comments from anybody out there who may have attempted something similar.

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