We find what condition on gradient vector fields characterizes warped products, Riemannian products and round spheres. To do this we apply the theory of Jacobi equations without conjugate points to ...

Abstract: We propose a generalized gradient vector field based two-stage affine snakes method for the segmentation of optic nerve head in retinal fundus images. We obtain the course segmentation using ...

Abstract: We present a gradient domain object editing approach and its implementation for mobile devices. It can be used for creating a new composite image by removing, adding, and moving objects in ...

Medical image segmentation is one of the key technologies in computer aided diagnosis. Due to the complexity and diversity of medical images, the wavelet multi-scale analysis is introduced into GVF ...

Hello! It's been a while but I have a new question! I would like to use the orientation of the lithology (i.e. the direction of greatest dip) in each grid cell as an ...

In the present article we find the nature of N(κ)-contact metric manifolds admitting Riemann solitons with some restrictions on the potential vector fields. The cases, when the potential vector field ...