lagadic / vision_visp

ViSP stack for ROS
http://wiki.ros.org/vision_visp
GNU General Public License v2.0
182 stars 90 forks source link

vist_tracker reconfigure produces an OpenCV error #58

Closed fspindle closed 7 years ago

fspindle commented 7 years ago

When running

% roslaunch visp_tracker tutorial.launch

and then trying to modifiy the tracker parameters like (sample_step) using

% rosrun rqt_reconfigure rqt_reconfigure

You will get the following OpenCV error:

OpenCV Error: Assertion failed ((npoints = prevPtsMat.checkVector(2, CV_32F, true)) >= 0) in calcOpticalFlowPyrLK, file /build/opencv-SviWsf/opencv-2.4.9.1+dfsg/modules/video/src/lkpyramid.cpp, line 845