为了解决高阶局部特征带来的计算复杂度提高问题,提出一种基于核函数的高阶局部特征表示方法。通过在两幅图像的局部特征之间进行比较,将特征空间映射到几何不变空间,统计高阶局部特征构建核函数,并结合支持向量机进行多类目标图像分类实验。实验结果分析表明,该方法在提高分类准确率的同时,所需的计算时间只与局部特征的个数呈线性增长。
In order to solve the computation increase caused by high order local features, this paper proposed a novel high order local feature representation approach based on kernel function. It first compared local features extracted from two difference images. Then transformed the features in the two images to the geometry invariant spaces. Next, it constructed kernel function by counting high order features. Finally, it performed the multi object classification experiment by using support vector machine. The experimental results show that proposed method has better precision and its computation time is linear to the number of local features in images.