Edge Detection Method and Feature Extraction of the Pinna Cartilage

Abstract

The similarity measure of the ear pinna contour was proposed. The similarity of the pinna is thought to be a growth process recorded in the cartilage shape of the pinna. The feature of the growth process is numeraical pixel when shwing by the ruggedness in an contour line. (1) The approximation method of using a parabolic arc of an contour line is effective to the extraction of this feature. (2) The similarity of an contour line showed that the method by which it measured in amount (det(p’p”)) concerning the area of the support triangle of a parabolic arc was effective. Finally, The method of applying the edge detection method by Canny to the density value acquired like the radiation was effective about an inside edge detection of the pinna with a gradual density change.