Spatial information augmented representation using affine transformations registration

doi:10.3778/j.issn.1002-8331.2010.03.005

Computer Engineering and Applications ›› 2010, Vol. 46 ›› Issue (3): 16-19.DOI: 10.3778/j.issn.1002-8331.2010.03.005

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Spatial information augmented representation using affine transformations registration

WU Xue-ling¹，REN Fu²，DU Qing-yun²

1.Institute of Geophysics & Geomatics，China University of Geosciences，Wuhan 430074，China
2.School of Resources and Environment Science，Wuhan University，Wuhan 430079，China

Received:2009-08-17 Revised:2009-11-12 Online:2010-01-21 Published:2010-01-21
Contact: WU Xue-ling

仿射变换虚实配准的空间信息增强表达

武雪玲¹，任福²，杜清运²

1.中国地质大学地球物理与空间信息学院，武汉 430074
2.武汉大学资源与环境科学学院教育部地理信息系统重点实验室，武汉 430079

通讯作者: 武雪玲

Abstract

Abstract: With the emergence of mobile GIS and wearable computing，operating space of GIS is extended to outdoor.Outdoor augmented reality spatial information representation is committed to enhance and expand user’s spatial cognition by overlaying virtual geographic objects on real scene.For the purpose of reducing registration error and avoiding complicated camera calibration，it borrows algorithm from computer vision to set up global affine coordinate system for computing projection coordinates of virtual objects into real scene images.Simultaneously，it brings forward an approach to get pixels relative depth.It provides location-related information sources for outdoor AR and becomes a new interface for spatial information visualization representation.

Key words: outdoor augmented reality, spatial information representation, virtual-real registration, spatial affine transformations

摘要： 伴随着移动GIS和可穿戴计算的出现，GIS作业空间被拓展到户外，户外增强现实空间信息表达致力于将虚拟空间信息叠加到真实地理场景上，增强、拓展用户对地理场景的认知。为了有效地降低空间信息增强表达的虚实配准误差，汲取计算机视觉中的算法思想，提出通过建立全局仿射坐标系，解算虚拟物体到真实场景图像的投影坐标，找到获取像素相对深度参数的方法，进而避开相机定标这个复杂过程，最终为户外增强现实系统提供位置相关的信息源，也为空间信息可视化表达提供了新界面。

关键词: 户外增强现实, 空间信息表达, 虚实配准, 空间仿射变换

CLC Number:

P208

WU Xue-ling¹，REN Fu²，DU Qing-yun². Spatial information augmented representation using affine transformations registration[J]. Computer Engineering and Applications, 2010, 46(3): 16-19.

武雪玲¹，任福²，杜清运². 仿射变换虚实配准的空间信息增强表达[J]. 计算机工程与应用, 2010, 46(3): 16-19.

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Spatial information augmented representation using affine transformations registration

仿射变换虚实配准的空间信息增强表达

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