18 search results - page 1 / 4 » Generalized Gradients: Priors on Minimization Flows |
IJCV
2007
13 years 9 months ago
2007
This paper tackles an important aspect of the variational problem underlying active contours: optimization by gradient flows. Classically, the definition of a gradient depends d...
SGP
2007
13 years 11 months ago
2007
Geometric flows are ubiquitous in mesh processing. Curve and surface evolutions based on functional minimization have been used in the context of surface diffusion, denoising, sha...
ICIP
2006
IEEE
14 years 11 months ago
2006
IEEE
Active contours are adapted to image segmentation by energy minimization. The energies often exhibit local minima, requiring regularization. Such an a priori can be expressed as a...
CVPR
2008
IEEE
13 years 11 months ago
2008
IEEE
In this paper, we present a novel single-image vignetting method based on the symmetric distribution of the radial gradient (RG). The radial gradient is the image gradient along t...
CVIU
2008
2008
Topology cuts: A novel min-cut/max-flow algorithm for topology preserving segmentation in N-D images
13 years 9 months ago
Topology is an important prior in many image segmentation tasks. In this paper, we design and implement a novel graph-based min-cut/max-flow algorithm that incorporates topology p...