为了解决基于Wedgelet变换的多尺度分割算法在楔形方向的选择上需要计算所有分解楔形系数,且没有利用上层分解的结果,计算量特别大的问题,提出一种从图像的几何结构出发,在图像四分树的基础上加以楔形区域分割,在矩形区域的楔形方向选取上建立多分辨分析的算法。该算法在上层分割的基础上,只需计算八个方向的Wedgelet,而不是所有方向,既避免了窗口初始化,降低了分割过程特征抽取的复杂性,又减少了迭代次数。经试验比较,本文方法优于同类方法。
The Wedgelet had a drawback which was due to annoying the last segmentation result and huge amount of calculation. Based on the analysis of Wedgelet transform ' s principle, proposed an efficient multiscale Wedgelet segmentation algorithm. In choosing the Wedgelets to form the segment, it could only calculate eight Wedgelets not the all. At last, applied this algorithm to some SAR images and compared the segmentation result with other algorithms, experiments show that this algo- rithm is better than others.