Rotation-Variant Template Matching for Supervised Hyperspectral Boundary Detection
Rotation-Variant Template Matching for Supervised Hyperspectral Boundary Detection
复制标题
DOI：
10.1109/lgrs.2006.886424
复制
发表时间：
2007-01
影响因子：
4.8
通讯作者：
H. Werff;F. V. Ruitenbeek;M. Meijde;F. Meer;S. Jong;Saman Kalubandara
中科院分区：
文献类型：
--
作者：
H. Werff;F. V. Ruitenbeek;M. Meijde;F. Meer;S. Jong;Saman Kalubandara
边缘算子广泛应用于灰度图像，最近得到了改进，可用于多光谱甚至高光谱图像。高光谱图像中的高光谱信息内容允许详细描述边界，从而允许监督边界检测。在这封信中，我们描述了一个模板匹配算法检测模糊和清晰的边界。为此，模板具有由两个不同光谱组成的一维设计。通过在图像上移动和旋转模板，该模板与遥感图像相匹配。针对每个位置和方向计算模板的统计空间和光谱拟合。在这种方法中的重要步骤是根据我们对边界的了解设计模板，并且主要取决于模板设计，算法输出的解释。该算法已被用于检测选定的矿物组合之间的边界的高光谱图像，涵盖了热液蚀变系统。实验结果表明，该算法能够成功地检测出模板中定义的边界。此外，它表明，在算法中的模板旋转揭示了信息的类型的边界（清晰或模糊），并确定像素只有一个模板端元存在
Edge operators are widely used on gray-level images and are recently improved to work with multispectral and even hyperspectral imagery. The high spectral information content in hyperspectral images allows a detailed description of boundaries and thus a supervised boundary detection. In this letter, we describe a template matching algorithm for the detection of fuzzy and crisp boundaries. For this purpose, the template has a one-dimensional design consisting of two different spectra. This template is matched to a remote sensing image by moving and rotating the template over the image. A statistical spatial and spectral fit of the template is calculated for every position and orientation. Important steps in this approach are the design of a template according to our knowledge of a boundary, and, mainly depending on the template design, the interpretation of the algorithm output. The algorithm has been used for the detection of boundaries between selected mineral assemblages in a hyperspectral image that covers a hydrothermal alteration system. Results show that the algorithm successfully detects the boundaries that had been defined in the templates. In addition, it is shown that rotation of the template in the algorithm reveals information on the type of boundary (crisp or fuzzy) and identifies pixels where only one of the template endmembers is present