由于原始的模糊c -均值聚类算法没有考虑图像的空间信息，算法对图像中的噪音点十分敏感。
Without considering the spatial information of images, the original fuzzy C-means algorithm is very sensitive to image noise.
目前流行的CAD系统具备一定的数据预处理功能，如：去除明显噪音点、对称基准重建、重定位整合等。
The present popular CAD systems can deal with CMM data to some extent, such as: delete noisy points, rebuild symmetrical benchmark, data combination.
改进算法增加了背景主颜色的自动提取，并通过平滑和循环曲线拟合的方法剔除噪音点，保留真正的边缘点。
The improved method is designed to extract the color of playing surface on the table automatically, and we filter the noise edge pixels by smoothing and iterated curve fitting.
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