关键词: 边缘检测, 噪声图像, 万有引力定律, 非线性滤波

Abstract: Introducing the nonlinear filtering operator into the gravitational edge detection algorithm, a new edge detection method was presented. Firstly, the image was used to calculate the nonlinear gradient value of every pixel. Then a normalized function was constructed by using the nonlinear gradient value as independent variable. Finally, the gravitational edge detection was implemented by using the function value instead of the gray value of center pixel. The experimental results demonstrate that, compared with traditional edge detection algorithms, the proposed approach has better accuracy in edge location and get favorable edge for various noise images.

Key words: edge detection, noise image, law of universal gravity, nonlinear filtering