比较了软阈值，硬阈值及当今各种阈值计算方法,多元数据分析的主分量分析投影，实现了图像的灰度化并进一步用于视频监视控。- Comparison of soft threshold and hard threshold and today various threshold calculation method, Principal component analysis of multivariate data analysis projection, Achieve a grayscale image and further control for video surveillance.