To obtain high accuracy and real time processing in wheel wear detection

firstly

the article put forward a method of camera calibration based on the previous research

which simplified the computationin camera chlibration by use of the special features in this imaging system; secondly

it suggested a new edge growing method based on easy differential algorithm and the classical 8 neighbor fields method. in which the neighbor area of a pixel on the wheel edge is analyzed in datail and then the method was put forward according to the special character of wheel image. It has been verified by the test on spot that the calibration algorithm is easy to be realized and can meet the accuracy requirement and that the edge growing algorithm is fast enough to be processed in real time and can obtain the better tracking result. In a word

the algorithms are effective and of a certain value.