private void Canny1Changed(float canny1Bar)
{
canny1Value = int.Parse(_canny1MinValue.text) + canny1Bar * (int.Parse(_canny1MaxValue.text) - int.Parse(_canny1MinValue.text));
_canny1Value.text = canny1Value.ToString();
/*if (canny1Listeners.Count > 0) {
* foreach (TrackbarListener l in canny1Listeners) {
* l.Callback(canny1Value);
* }
* }*/
core.SetCannyThreshold((int)canny1Value);
}