Xue Jinghao, Zhang Yujin, Lin Xinggang. MAP Pixel Clustering Method Based on SEM Estimation of ScatterPlot for Low Quality Image[J]. Acta Electronica Sinica, 1999, (7).
Xue Jinghao, Zhang Yujin, Lin Xinggang. MAP Pixel Clustering Method Based on SEM Estimation of ScatterPlot for Low Quality Image[J]. Acta Electronica Sinica, 1999, (7).DOI：
Histogram is the most commonly used method to illustrate the grayscale statistical distribution of an image.2D histograms include cooccurrence matrix
（graylevel
edgevalue） scatter plot（graylevel
local average graylevel） scatter plot etc.In this paper
we present an image segmentation algorithm which uses SEM algorithm to implement parameters estimation of the hypothesis of 2D normal distribution about （graylevel
local average graylevel）scatter plot
and uses MAP criterion to achieve unsupervised pixel clustering.Compared with other thresholding methods based on scatter plot by applying them to various test images
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