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Những tiến bộ gần đây trong các bộ cảm biến hình ảnh kỹ thuật số và kỹ thuật tầm nhìn máy tính có khả năng cải thiện đáng kể khả năng giám sát và nghiên cứu một loạt các môi trường, bao gồm cả mối quan hệ giữa bảo tồn rừng và biến đổi khí hậu toàn cầu, tác động của sự mở rộng ngoại thành về chất lượng nước uống, vàđánh giá rủi ro cháy trên những vùng đất công cộng và tư nhân lớn. Tuy nhiên, tiềm năng đầy đủ của các công nghệ này không thể được. | A Low-Cost System for Creating 3D Terrain Models from Digital Images Howard Schultz Aerial Vision Inc. Amherst MA 01002 schultz@aerialvision.com ABSTRACT Recent advances in digital image sensors and computer vision techniques have the potential to significantly improve the ability to monitor and study a wide variety of environments including the relationship between forest conservation and global climate change the impact of suburban sprawl on drinking water quality and fire risk assessment over large tracts of public and private land. However the full potential of these technologies cannot be realized until robust automatic end-to-end systems are made available that enable the end user to generate meaningful results from these new data sources and analysis tools. Our goal is to improve the way in which Geographic Information System GIS databases are created updated and utilized. We are building systems that enable organizations to rapidly and inexpensively generate update analyze and visualize high-resolution 3D digital terrain models from digital images collected by a portable camera system mounted on a single engine aircraft. These techniques will expand the scope of GIS applications especially in areas where low cost and short turnaround time are critical. This paper discusses the general problem of reconstructing 3D terrain models for small format digital images and presents a system that integrates an instrument package constructed from commercial off-the-shelf components with a suite of analysis and terrain modeling algorithms. Preliminary results are presented that demonstrate the feasibility of the system. 1. INTRODUCTION Understanding the impact of society on the natural world has become a central theme in scientific research and government policy formation. U.S. government agencies and international organizations are increasing the amount of resources allocated to studying a wide range of environmental and ecological topics including carbon cycle .
