CannyThreshold     68 samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp   createTrackbar( "Min Threshold:", window_name, &lowThreshold, max_lowThreshold, CannyThreshold );
CannyThreshold     71 samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp   CannyThreshold(0, 0);