Maximum FPS of Fiducial Tracker?

vvvv beta question
1

Hi there,

I’ve been playing around with the FiducialTracker with a GigE (IDS Imaging) cam that delivers 50 fps @ 1280x1024. When using the fiducial tracker on the video the output video is only about 25 fps.

No matter what I tried, I never could increase the frame rate of the tracker. Is this a limitation of the node? There is plenty of CPU headroom left, so i guess it has nothing to do with a slow machine.

I’m hoping to get a better time resolution than that when tracking.

Thanks!

2

hei motzi, there is no 25fps restriction. for me at runs at 30fps on the laptops built-in cam. does the fps increase when you set resolution lower?

are you sure there is cpu left? in nowadays multicore cpus the taskmanagers overall cpu% view is missleading. while it may still show a low cpu% individual cores may already be maxing out. and freeframe/tracking runs only on a single core…

3

Hey there,

im not sure what you trying to achieve but Ive had the same problem and then started using the Reactivision tracking Software:

http://reactivision.sourceforge.net/

You can then dedicate a few of your system resources ( CPU Cores ) and split the load between VVVV and Reactivision in the TaskManager.

https://discourse.vvvv.org/

I think the TUIO Decoder node you need to receive Reactivisions Tracking Data is now included in the addon pack?

Tip: If you cant get your Camera to work in Reactivision, simply deactivate all other Camera installed on your system in the windows Device Manager, Reactivision will then chose whats left.

4

hi again,

thanks joreg and gegenlicht and sorry for the late reply.
actually i tried a few things, i’ll try to explain:

  • cam is a uEye GigE capable of 1280x1024 @ 50fps.
  • i can use the camera in two ways in VVVV for tracking
    ** DirectShow drivers via VideoIn
    ** shared memory uEye nodes in VVVV
  • using both methods CPU utilization on the core that it is running on is about 60-70% (so i would say there is some headroom left)

with directshow/videoin

  • getting full resolution at around 17 fps
  • drivers option page does not allow detailed adjustment of camera properties (like pixelclock, …) which could be handy for detailed setting up

with uEye/shared memory nodes

  • resolution is definitely not 1280x1024, even though the shared memory node has this resolution as parameter. i can see that the resolution is not that high because edges are jaggy and tracking performance is worse than with the directshow setup of things.
  • fps is around 25fps

is there a way to setup the resolution of the uEye plugin?

of course i already tried also the reactivision software but performance is identical with the directshow setup.
that would argue for a low performance of the reactivision software with high resolutions or a poor directshow driver of the uEye…

anybody with other opinions on this? MSBERGER maybe?