由于只是利用图像的灰度信息，sl 算法不能很好地区分形状相似但颜色不同的物体：针对这一问题，提出了一种基于彩

色的SIFT特征点提取算法，并着重分析了多种彩色模型对算法性能的影响?这种算法也是在图像的灰度尺度空间上检测特征点，

但其特征向量由各描述子子区域的彩色模型分量的均值组成并在原始的彩色图像上进行计算：实验结果证明了该算法的有效性。-Abstract：Because only the gray scale information is utilized．the SIFT method can’t differentiate the objects with similar shape

but with diferent colors commendably．1,1 order to solve such problem．presents a color—based SIF I feature point detecting method

and analyzs the method’S performance in temas of diferent color models The method detected interest points in the gray image

scale space，and its eigem eetors al’e composed of the mean 、 alues of different color model components in each subregion and are

computed based on the Ol。iginal color images．Tile experimental results have proved its validity