求翻译：根据以上分析，我们针对角点及其旋转图像进行基于contourlet分解系数的特征提取。用子带方差的大小以及每个分解层次中各个方向子带“能量”作为角点的特征向量。具体方法如下：是什么意思？

Based on the above analysis, we focused on corners and rotate images based on contourlet decomposition coefficients of the feature extraction. Variance with the size of sub-band decomposition level of each band in each Fangxiang Zi "energy" as the corner of the feature vector. Specific methods are a

Based on the above analysis, we focused on this point and its rotating images contourlet decomposition coefficients based on the feature extraction. Along with a son as well as the size difference in each of the disaggregated levels with various directions son "energy" as a point to point in the fea

According to above analysis, we carry on in view of the vertex and the revolving image based on the contourlet resolution ratio characteristic extraction.Each direction innertube “the energy” takes the vertex with in the innertube variance size as well as each decomposition level the characteristic

According to the above analysis, we focused on a corner point and rotate the image feature extraction based on contourlet transform coefficients. Variance with the child, as well as the size of each subband decomposition level in each direction "energy" as the eigenvectors of a corner point. Specifi

According to the above-mentioned analysis, we click and rotate the picture and withdraw the characteristic based on that contourlet decompose the coefficient to the angle. Use son bring size and each of variance decompose all directions son bring " the energy " as characteristic vector that corner o