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    章皖秋, 袁华, 徐天蜀. 遥感影像正立体化研究[J]. 北京林业大学学报, 2010, 32(3): 41-46.
    引用本文: 章皖秋, 袁华, 徐天蜀. 遥感影像正立体化研究[J]. 北京林业大学学报, 2010, 32(3): 41-46.
    ZHANG Wan-qiu, YUAN Hua, XU Tian-shu. Restoring true topographic perception of remote sensing images[J]. Journal of Beijing Forestry University, 2010, 32(3): 41-46.
    Citation: ZHANG Wan-qiu, YUAN Hua, XU Tian-shu. Restoring true topographic perception of remote sensing images[J]. Journal of Beijing Forestry University, 2010, 32(3): 41-46.

    遥感影像正立体化研究

    Restoring true topographic perception of remote sensing images

    • 摘要: 山脊与沟谷视觉效果相反的反立体现象,是遥感影像目视判读中的常见问题。消除反立体现象,使影像地物显示正立体化,对加强遥感影像的使用,特别是对非专业人员具有重要意义。本文提出了阴影模型(SRM)条件参与的IHS融合法、SRM乘法融合法和纯地形纠正法3种遥感影像正立体化方法,并与5种已有的方法进行QuickBird影像实验。通过比对证明:在实现影像正立体化的同时,这3种方法的整体视觉效果和地物光谱保留方面要优于其他方法。其中,相比已有的SRM参与的IHS融合法,SRM条件参与的IHS融合法是一种改进,能获得色调与原始影像相似的正立体影像;SRM乘法融合法算法简单、正立体影像视觉效果较好,适用于影像效果制图;纯地形纠正方法通过改变光源位置实现正立体化,从原理上保留了地物光谱信息,可用于定量研究。

       

      Abstract: A false topographic perception phenomenon is often an obstacle when using remote sensing images, especially for non-professionals. Three new methods were developed to correct this false topographic perception phenomenon in remote sensing images. They are 1) fusion of the weighted image and weighted shaded relief model (SRM) by applying intensity-hue-sat uration (IHS) transform, 2) multiplying the images by SRM and 3) modifying the illumination site based on topographic correction. A case study based on a QuickBird image was made to compare the new methods with five existing methods. Our empirical results indicate that the three new methods are better than previous ones by obtaining optimal visual quality, preserving the spectra of images and effective removal of false topography. Derived from the conventional method of SRM-IHS fusion, the first method can yield true topographic perception images with colors similar to the original images. The second method, a simple process with good effects, meets map-making specifications. The third method preserves the spectral information of images by changing the location of the light source, but produces image requiring further quantitative studies. 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