منابع مشابه
Flux Maximizing Geometric Flows
Several geometric active contour models have been proposed for segmentation in computer vision. The essential idea is to evolve a curve (in 2D) or a surface (in 3D) under constraints from image forces so that it clings to features of interest in an intensity image. Recent variations on this theme take into account properties of enclosed regions and allow for multiple curves or surfaces to be si...
متن کاملGradient Flows and Geometric Active Contour Models Gradient Flows and Geometric Active Contour Models
In this note, we analyze the geometric active contour models proposed in 10, 31] from a curve evolution point of view and propose some modiications based on gradient ows relative to certain new metrics. This leads to a novel snake paradigm in which the feature of interest may be considered to lie at the bottom of a potential well. Thus the snake is attracted very naturally and eeciently to the ...
متن کاملKähler (& Hyper-kähler) Manifolds
These notes are based on two talks given at the Arithmetic & Algebraic Geometry Seminar of the Korteweg-de Vriesinstituut for mathematics of the Universiteit van Amsterdam. They are intended to give a short introduction to the theory of Kähler manifolds, with a slight focus of applicability to the subject of K3 surfaces. However, they also include other interesting results not related to K3 sur...
متن کاملReverse bubbling in geometric flows
Reverse bubbling refers to singularities which develop in geometric flows as one takes a reverse limit t ↓ T rather than the traditional t ↑ T . Flows with this type of singularity may have different or better properties, and can provide alternative ways of flowing past singularities. We survey the original reverse bubbling theory for the harmonic map flow, including recent developments, and ot...
متن کاملRenormalization group equations and geometric flows
The quantum field theory of two-dimensional sigma models with bulk and boundary couplings provides a natural framework to realize and unite different species of geometric flows that are of current interest in mathematics. In particular, the bulk renormalization group equation gives rise to the Ricci flow of target space metrics, to lowest order in perturbation theory, whereas the boundary renor...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Symplectic Geometry
سال: 2015
ISSN: 1527-5256,1540-2347
DOI: 10.4310/jsg.2015.v13.n2.a8