Topics

1

General / Multi-convergence problem with bundle

« on: February 05, 2016, 11:25:46 AM »

Hi,

The bundle adjustment in Agisoft seems to work quite well for small block e.g. 500m x 500m for our data. But as the block size increases to around 1000m x 1000m, the bundle adjustment runs into multi-convergence problem. That is, it converges to a solution that's not correct, with patches of tie-points floating at heights which are obviously not where the ground structures should be.

We have pretty good knowledge of the heights (min, max) of the area that we are surveying. Is there any way that we can tell Agisoft to obey some height constraints during the bundle adjustment?

Thanks.

Jason

2

Python and Java API / exportMatches using Python Script API?

« on: November 16, 2015, 01:06:44 PM »

Hi,

Can we export feature matches using Python script API?

By feature matches I mean some feature point (x1,y1) on image 1 is matching (x2,y2) on image 2, like what's showing in Agisoft in the attached screenshot. The information is obviously stored somewhere in memory, but we just cannot find any means to extract it.

Thank you very much in advance.

Jason

3

Python and Java API / Debugging python code in Agisoft?

« on: October 12, 2015, 11:38:15 AM »

Hi,

Is there any way to debug Python code running inside Agisoft (e.g. step over, step into, step out, and peek at variable values during execution)?

Currently I have just been doing lots of print statements.

Thanks in advance.
Jason

4

General / How to put constraints on photo alignment?

« on: October 12, 2015, 04:58:22 AM »

Hi,

I have a number of geo-tagged photos from an ariel survey. The geo-tagged information are (x,y,z,roll,pitch,yaw) with a known precision. When Agisoft aligns these photos, it adjusts the (x,y,z,roll,pitch,yaw) way too much for some of these photos. Is there any way I can put some constraints on the photo alignment to tell Agisoft to adjust (x,y,z,roll,pitch,yaw) within certain bounds?

Thanks in advance.
Jason

5

General / export tie points as XYZ

« on: August 31, 2015, 10:45:04 AM »

Hi,

Is there any way I can export tie points in Photoscan as xyz in world coordinates instead of xy in image coordinates? I notice that I can export both sparse and dense cloud points as xyz in world coordinates. So I thought I can do the same for tie points. But I just can't find the function to do so.

Thanks in advance for any help.

Cheers
Jason

6

General / Orima matches export - what do the fields mean?

« on: July 28, 2015, 11:38:11 AM »

Hi,
I am quite new to photogrammetry. I am just wondering if anyone can tell me what the fields in the orima matches (tie point) export file mean? It looks like this:

0001_cam1_00001194.jpg           10818         -7.8605          6.9360   0   M
0001_cam1_00001194.jpg           10819         -5.1143          6.8573   0   M
0001_cam1_00001194.jpg           10820          6.0736          6.8655   0   M

I figured the first column is image file name. Is second column tie point ID? What are third and fourth column and what unit are they in?

Thanks in advance.

Jason