Accurate Overlapping Method of Ultra-Long Interval Time-Lapse Images for World Heritage Site Investigation
Accurate Overlapping Method of Ultra-Long Interval Time-Lapse Images for World Heritage Site Investigation
复制标题
世界遗产地考察超长间隔延时影像精确重叠方法
DOI：
10.1145/3373357
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Kitahara Itaru
中科院分区：
文献类型：
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作者：
Shishido Hidehiko;Kawasaki Emi;Kawamura Youhei;Matsui Toshiya;Kitahara Itaru
本文提出了一种结合图像间对应点信息和三维形状信息，实现不同拍摄位置和拍摄间隔的多幅高质量图像精确叠加的方法。在所提出的方法中，使用通过渲染对象的3D模型获得的图像的正确特征匹配。本研究以吴哥通巴戎寺的石柱为研究对象，研究了附着在石柱表面的微生物对石柱表面的侵蚀作用。利用正确匹配的单应性的合成变换被用来重叠目标图像。当使用传统方法重叠不同的背景图像时，由于不正确的匹配，单应矩阵的估计变得困难;因此，不能获得高质量的重叠图像。本研究的目的是实现重叠的图像处理，即使在导致不正确的特征匹配的条件下，如背景和照明的差异。在这项研究中，使用所提出的方法可视化的支柱表面的损坏部分。最后通过实验将该方法与现有方法进行了比较，验证了该方法的有效性和较高的精度。这项研究的结果有助于保护吴哥通巴戎寺，包括本报告作者正在为这一具有文化和历史价值的联合国教育、科学及文化组织世界遗产组织的保护项目。
In this article, a method is proposed to accurately overlap multiple high-quality images with different shooting positions and intervals by combining corresponding point information between images and 3D shape information. In the proposed method, the correct feature matching of images obtained by rendering the 3D model of the subject is used. In this research, the subjects were the pillars of the Angkor Thom Bayon Temple and the epilithic microorganisms adhering to and eroding their surfaces. Synthetic transformation of a homography utilizing the correct matches is employed to overlap the target images. When overlapping different background images using the conventional method, estimation of the homography matrix becomes difficult owing to incorrect matches; thus, high-quality overlapping images cannot be obtained. The objective of this research was to realize the overlapping image process even under conditions that cause incorrect feature matches, such as differences in background and illumination. In this study, the damaged parts of the pillar surfaces were visualized using the proposed method. Based on the results of an experiment comparing the proposed method with an existing state-of-the-art method, the effectiveness and higher accuracy of the proposed method were verified. The findings of this research contribute to Angkor Thom Bayon Temple preservation, including a preservation project that the present authors are organizing for this culturally and historically valuable United Nations Educational, Scientific and Cultural Organization World Heritage site.