Bayesian Image Analysis With Markov Chain Monte Carlo and Coloured Continuum Triangulation Models
基于马尔可夫链蒙特卡洛与彩色连续三角剖分模型的贝叶斯图像分析AI 解读 ↓
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基于马尔可夫链蒙特卡洛与彩色连续三角剖分模型的贝叶斯图像分析AI 解读 ↓
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Summary It is now possible to carry out Bayesian image segmentation from a continuum parametric model with an unknown number of regions. However, few suitable parametric models exist. We set out to model processes which have realizations that are naturally described by coloured planar triangulations. Triangulations are already used, to represent image structure in machine vision, and in finite element analysis, for domain decomposition. However, no normalizable parametric model, with realizations that are coloured triangulations, has been specified to date. We show how this must be done, and in particular we prove that a normalizable measure on the space of triangulations in the interior of a fixed simple polygon derives from a Poisson point process of vertices. We show how such models may be analysed by using Markov chain Monte Carlo methods and we present two case-studies, including convergence analysis.