New Contour Extracting Method and its Application in Registration of MR-CT
Presented a new contour extraction method to get feature for rigid registration.The new contour extraction method gets the attribute threshold and the gray threshold by the sizes of the attribute automatically.The level set corresponding the gray threshold is operated by the attribute operation,then the gradient operator is used.The method has the strong anti-noise property and the shapes of contours are kept good.Some important properties are proposed and proved.The contours extracted by our method are very similar,that is to say,the multi-modal registration is transferred into the single-modal.The experiment results show that the aligning precision is improved greatly.