Geodesic active contour model is an effective method for the contour detection of multiple objects on an image.
2
非视距声信号通常经过绕射到达基阵,根据广义费马原理,传播路径为一条短程线。
The NLOS sound signal usually arrives at acoustic array by diffraction, and the diffracted transmission path is a geodesic according to the extensive Famat's principle.
3
本文研究证明,正螺面上的短程线就是一根圆柱螺线,可根据正螺面的参数准确计算出其数值。
This paper proves that the geodesic on the positive spiral surface is a cylindrical spiral, which can be calculated with the parameters on the positive spiral surface.