说明：  由于只是利用图像的灰度信息, SIFT 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。
(Since only the use of images of gray-scale information, SIFT algorithm can not distinguish between good shape similar but different colors of objects. In this paper, a color based on SIFT feature point extraction algorithm, and focuses on a wide range of color model algorithm performance.)