Recognition of fracture image based on tree wavelet transform

Fracture image recognition is a important part of failure analysis.A new method of recognition of fracture image based on wavelet transform is presented in this paper.Two-lever wavelet transform is applied to metal fracture image recognition by selecting tree structure wavelet transform.Standard deviations of each wavelet transform frequency band output except approximate value is used as the characteristics of fracture image recognition.And minimal distance classifier is used to classify the fracture image.Experiment results show that it has a high recognition rate for metal fracture image classification.