英语翻译Due to the difficulty of estimating the number of pixelclasses (or clusters),unsupervised algorithms often assumethat this parameter is known a priori [4,5].When the numberof pixel classes is also being estimated,the unsupervisedsegmentat

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 11:57:01
英语翻译Due to the difficulty of estimating the number of pixelclasses (or clusters),unsupervised algorithms often assumethat this parameter is known a priori [4,5].When the numberof pixel classes is also being estimated,the unsupervisedsegmentat

英语翻译Due to the difficulty of estimating the number of pixelclasses (or clusters),unsupervised algorithms often assumethat this parameter is known a priori [4,5].When the numberof pixel classes is also being estimated,the unsupervisedsegmentat
英语翻译
Due to the difficulty of estimating the number of pixel
classes (or clusters),unsupervised algorithms often assume
that this parameter is known a priori [4,5].When the number
of pixel classes is also being estimated,the unsupervised
segmentation problem may be treated as a model selection
problem over a combined model space.Basically,there
are two approaches in the literature.One of them is an
exhaustive search of the combined parameter space [6,7]:
segmentations and parameter estimates are obtained via
an iterative algorithm by alternately sampling the label
field based on the current estimates of the parameters.
Then the maximum likelihood estimates of the parameter
values are computed using the current labeling.The resulting
estimates are then applied to a model fitting criterion to
select the optimum number of classes.Another approach
consists of a two step approximation technique [1,8]:the
first step is a coarse segmentation of the image into the
most likely number of regions.Then the parameter values
are estimated from the resulting segmentation and the final
result is obtained via a supervised segmentation.
Our approach consists of building a Bayesian color
image model using a first order MRF.The observed image
is represented by a mixture of multivariate Gaussian distributions
while inter-pixel interaction favors similar labels at
neighboring sites.In a Bayesian framework [9],we are
interested in the posterior distribution of the unknowns
given the observed image.Herein,the unknowns comprise
the hidden label field configuration,the Gaussian mixture
parameters,the MRF hyperparameter,and the number
of mixture components (or classes).Then a RJMCMC
algorithm is used to sample from the whole posterior distribution
in order to obtain a MAP estimate via simulated
annealing [9].Until now,RJMCMC has been applied to
univariate Gaussian mixture identification [10] and its
applications in different areas like inference in hidden Markov
models [11],intensity-based image segmentation [12],
and computing medial axes of 2D shapes [13].The novelty
of our approach is twofold:first,we extend the ideas in
[10,12] and propose a RJMCMC method for identifying
multi-variate Gaussian mixtures.Second,we apply it to
unsupervised color image segmentation.RJMCMC allows
us the direct sampling of the whole posterior distribution
defined over the combined model space thus reducing the
optimization process to a single simulated annealing run.
Another advantage is that no coarse segmentation neither
exhaustive search over a parameter subspace is required.
Although for clarity of presentation we will concentrate
on the case of three-variate Gaussians,it is straightforward
to extend the equations to higher dimensions.

英语翻译Due to the difficulty of estimating the number of pixelclasses (or clusters),unsupervised algorithms often assumethat this parameter is known a priori [4,5].When the numberof pixel classes is also being estimated,the unsupervisedsegmentat
由于困难的数量估计象素上
类(或组群),非监督的算法经常承担
这个参数是已知的先验[4,第5条].当拨号
像素类也被估计的,则无监督
分割问题模型可以看作是选择
模型空间组合问题.我们主要
有两种方法在文献中找到.其中之一是一名宇航员
查找了组合参数空间[6、7]:
segmentations和参数估计通过了
通过交替一个迭代采样标签
基于目前的估计领域的参数.
然后的最大似然估计的参数
目前所使用的计算值标注.结果
估计然后被用于拟合标准模型
选择最佳数量的课程.另一种方法
由一个两步近似技术[第1、8]:
第一步是一个粗糙的图像的分割
最有可能的数量的地区.然后参数值
估计,从产生的分割决赛吗
结果通过监督的分割.
我们的方法由建筑贝叶斯的颜色
图像模型利用一阶磁流变液.观测图像
代表多元混合高斯分布
当inter-pixel交互支持.标签类似
邻近的地点.在贝叶斯[9],我们是来旅游的
感兴趣的后验分布敬献了花圈
观测图像了.规定的未知包括
隐藏的标号场的配置,对混合高斯
参数、磁流变液hyperparameter,这个数字
混合组件(或职业”).然后RJMCMC
算法对整个后验概率的样品
为了获得一张地图的估计进行了模拟.通过
退火[9].直到现在,RJMCMC已经应用于
单变量高斯混合模型识别和[10]所聚集的相当
在不同的地方,如inferen应用

由于困难的数量估计象素上
类(或组群),非监督的算法经常承担
这个参数是已知的先验[4,第5条]。当拨号
像素类也被估计的,则无监督
分割问题模型可以看作是选择
模型空间组合问题。我们主要
有两种方法在文献中找到。其中之一是一名宇航员
查找了组合参数空间[6、7]:
segmentations和参数估计...

全部展开

由于困难的数量估计象素上
类(或组群),非监督的算法经常承担
这个参数是已知的先验[4,第5条]。当拨号
像素类也被估计的,则无监督
分割问题模型可以看作是选择
模型空间组合问题。我们主要
有两种方法在文献中找到。其中之一是一名宇航员
查找了组合参数空间[6、7]:
segmentations和参数估计通过了
通过交替一个迭代采样标签
基于目前的估计领域的参数。
然后的最大似然估计的参数
目前所使用的计算值标注。结果
估计然后被用于拟合标准模型
选择最佳数量的课程。另一种方法
由一个两步ap部门说...

收起

英语翻译需要内含due to 英语翻译The economy due to tourism is different from one location to the other. 英语翻译 The upward forces are due to the tension in the cord. 英语翻译Marking of the teeth due to setting tooling is minimal.No cracks will exist at the base of the teeth due to setting. 英语翻译请用Due to开头 英语翻译if the project is due to less or cause changes or additional projects separately 英语翻译Due to the change of oxidation mechanism,a nano-effectwithaslightdecreaseoftheMECcouldbeexpected 求英语翻译,内容如下:More than 10 years ago, was diffi-cult to buy a tasty pineapple. The fruits that made it to the UK were green on the outside and, more often than not, hard with an unpleasant taste within. Then in 1996, the Del Monte Go due to the face that怎么造句 due to the 有什么语法吗? 英语翻译However,the enzyme electrodes are stillsuffering from:(1) the lack of stability due to the intrinsicnature of the enzymes; (2) the lack of simplicity andreproducibility due to the difficulty of the method forenzyme immobilization and (3) 英语翻译Nobody dare fail to attach due attention to the important of culture.英语句子详细分析,不是翻译. 英语翻译last but not least,you ,due to respect and communication at first ,are fumbling the way to build turst 英语翻译Our thanks are ()the whole term.A.due to B.dued to C.as D.because 英语翻译Jane Scott is fourteen and the year before last she began to study in a middle school.She likes dancing and singing and spends a lot of time on them.But she hates maths and does not work hard at it.She thinks it diffi­cult to learn m 英语翻译Several one-metre-wide cracks had opened up om the plane's runway due to the cold weather. 英语翻译Please see the attached sheet for snapshot criteria*TEFL grades are counted due to extraction in Sciences and Humanities 英语翻译Whenever interventions are to be effected during the warranty period,due payments must however be regularly fulfilled punctually.