【摘要】 计算机视觉中,投影置换不变量的表达不仅具有投影变换不变性,而且与特征的次序无关。采用它作为索引函数可以显著地提高特征集之间的匹配速度。首先介绍了几种投影置换不变量,分析了它们的一些性质,然后根据这几种投影置换不变量在稳定性和分辨力之间存在的矛盾,提出了改进投影置换不变量的方法。实验表明这种改进平衡了投影置换不变量的稳定性和分辨力。更多还原

【Abstract】 The expression of projection/permutation invariant in computer vision not only has invari- ance, but also has nothing to do with the sequence of characteristics. Using it as an index function, the matching speed between the feature sets can be obviously improved. Several kinds of projection/permutation invariants are first introduced and their properties are analyzed. A method for improving the invariant of projection/permutation is proposed. The experiments show that this improvement balances the stability and resolution of the invariant in projection/permutation.更多还原