Community Core Vision (Beta)

addons\ofxNCore\src\Tracking\Tracking.cpp - BlobTracker::track(ContourFinder* newBlobs)

this function touches the lastTimeTimeWasChecked time of a blob twice when going through it. Once when the uncalibrated blob is done being tracked (line 209), and once when the calibrated blob is done being tracked (line 254 / line 297). This causes the calibrated D values to be calculated incorrectly. Even worse, when the calculations are performed extremely fast (which is the case for my particular project with custom input) the resulting D values are NaN due to divisions by zero.

I hope the line numbers are correct, I might have added/deleted lines in my own file version. These are the lines you'll be looking for:

trackedBlobs[i].lastTimeTimeWasChecked = ofGetElapsedTimeMillis();

TouchEvents.messenger.lastTimeTimeWasChecked = ofGetElapsedTimeMillis();