private void Canny2Changed(float canny2Bar)
{
canny2Value = int.Parse(_canny2MinValue.text) + canny2Bar * (int.Parse(_canny2MaxValue.text) - int.Parse(_canny2MinValue.text));
_canny2Value.text = canny2Value.ToString();
/*if (canny2Listeners.Count > 0) {
* foreach (TrackbarListener l in canny2Listeners) {
* l.Callback(canny2Value);
* }
* }*/
core.SetCannyThreshold2((int)canny2Value);
}