一种鲁棒的图像局部仿射不变特征提取方法

摘要

提出一种鲁棒的图像局部仿射不变特征提取方法。该方法首先对图像进行M进制小波变换，根据M进制小波变换系数的能量性质来检测图像特征点。然后以检测到的稳定特征点为中心，根据特征点周围的局部图像信息，以矩的形式构造仿射不变特征描述子。实验结果证明该方法对图像的旋转变化、尺度变化、视点变化、平移等所有仿射变换均具有较好的不变性。%A robust affine invariant local image features extraction method is proposed. Firstly, the image is transformed with M band wavelet. The feature points of the image are detected according to the energy of the M band wavelet transform coefficients. Then, every detected feature point is set to be a center. According to the local image information around the center, affine invariant feature is constructed with a moment structure. The experiments prove the invariant efficiency of the proposed method in image rotation, shift, scaling and viewpoint change etc.