Tutorial by Topics: detection

Official Documentation: Detecting Common Gestures

edges = cv2.Canny(image, threshold1, threshold2[, edges[, apertureSize[, L2gradient]]]) void Canny(InputArray image, OutputArray edges, double threshold1, double threshold2, int apertureSize=3, bool L2gradient=false ParameterDetailsimageInput imageedgesOutput imagethreshold1First threshold...

When you try to set a value of an item at a particular index of an array initialized in the data option, vue can't detect the change and does not trigger an update to the state. In order to overcome this caveat you should either use vue's Vue.$set or use Array.prototype.splice method