SIFT算法是近几年才提出的一种新型局部特征描述子。SIFT特征独特性好，信息量丰富，对尺度缩放，旋转，视角变化，遮挡，噪声和亮度变化等大部分干扰都具有很好的鲁棒性，它在在场景匹配，目标识别等领域已获得成功利用-SIFT algorithm is a new feature in recent years that it has made a partial descr iption of the child. SIFT features unique and good, rich amount