利用Moravec算子、Forstner算子、Harris算子对一幅位图（灰度图像）进行点特征提取，还可以将非位图（如.jpg格式）灰度化后转换为灰度图像进行提取。-By Moravec operator, Forstner operator, Harris operator of a bitmap (gray image) for point feature extraction, can also be non-bitmap (such as. Jpg format) grayscale c