Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 24 Issue 1
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- Pages.97-101
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- 1987
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- 1016-135X(pISSN)
A New Interpretation of the Compass Gradient Edge Operators
Compass Gradient Edge 연산자의 새로운 해석방법
- Park, Rae-Hong (Dept. of Elec. Eng., Sogang Univ.) ;
- Choi, Woo Young (Dept. of Elec. Eng., Sogang Univ.)
- 박래홍 (서강대학교 이공대학 전자공학과) ;
- 최우영 (서강대학교 이공대학 전자공학과)
- Published : 1987.01.01
Abstract
The edge, a discontinuity or abrupt change in the gray-level or color, is a fundamentally important primitive feature of an image necessary for the image analysis and classification. Two-dimensional 3x3 compass gradient operators (ex. Sobel, Prewitt, and Kirsch operators)are commonly used in the edge detection and usually detect 8 compass directional components. In this paper, we present a new interpretation of the relationships between the resulting 8 gradient magnitudes and the 8 intensity values of neighboring pixels which are covered by the two-dimensional 3x3 mask. It is expected that a new gradient edge operator may be designed by changing the eigenvalues in the transform domain and the fast optical edge operator may be implemented by using the optical system.
Keywords