在matlab环境中自动识别连通区域的大小,实现了图像的灰度化并进一步用于视频监视控，包括主成分分析、因子分析、贝叶斯分析。- Automatic identification in the matlab environment the size of the connected area, Achieve a grayscale image and further control for video surveillance, Including principal component analysis, factor analysis, Bayesian analysis.