CSV structure

Post Reply
Hana
Posts: 1
Joined: Thu Feb 14, 2013 5:18 pm

CSV structure

Post by Hana » Thu Feb 14, 2013 5:27 pm

Hi,

We just recently started using Tracking Tools and I have a question about the structure of exported CSV file.

When tracking trackables, you get frame information that includes "== -- Marker Detail >for each tracked markerfor each marker in trackable< (x,y,z)".

What is the difference between these two sets of positions? They seem to differ slightly and the markers seem to be presented in a different order.

Thank you,
Hana

NaturalPoint - Brent
NaturalPoint Employee
NaturalPoint Employee
Posts: 59
Joined: Tue Nov 20, 2012 12:40 pm

Re: CSV structure

Post by NaturalPoint - Brent » Tue Feb 19, 2013 11:36 am

Hana,
I am going to ask around internally in our company and see if I can find an answer for you on this.

Brent

beckdo
NaturalPoint Employee
NaturalPoint Employee
Posts: 520
Joined: Tue Jan 02, 2007 2:02 pm

Re: CSV structure

Post by beckdo » Tue Feb 19, 2013 11:55 am

The reason there is a minor difference is because one set of marker locations is the original definition of the rigid body placed amongst the point cloud. The other set of markers is the point cloud locations. Since there are real-world errors in the system, however small, the rigid body will not fit exactly on any given frame.

One additional thing that is nice for the rigid body marker locations is that it will give you a location for markers that 'should be there' but are perhaps occluded on a current frame.

Post Reply