Abstract:

On the basis of the property of dental film and the characteristics of ridgelet transform maintaining linear structures this paper presents an edge detection method based on ridgelet transform.  The Radon transform connects the Gaussian wavelet and ridgelet. By means of this method one can obtain the continuous edge from the root canal image accurately by comparison the gray level mean in the ridgelet domain.  The experimental results show the method can denoise greatly, determine the location accurately and benefit the diagnosis and treatment.

Key words:  wavelet transform, Radon transform； ridgelet transform, root canal working length, edge detection