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Abstract：
Although the field of geomatics has seen multiple technological advances in recent years which enabled new applications and simplified the consolidated ones, some tasks remain challenging, inefficient, and time- and cost-consuming. This is the case of accurate tridimensional surveys of narrow spaces. Static laser scanning is an accurate and reliable approach but impractical for extensive tunnel environments; on the other hand, portable laser scanning is time-effective and efficient but not very reliable without ground control constraints. This paper describes the development process of a novel image-based multi-camera system meant to solve this specific problem: delivering accurate, reliable, and efficient results. The development is illustrated from the system conceptualization and initial investigations to the design choices and requirements for accuracy. The resulting working prototype has been put to the test to verify the effectiveness of the proposed approach.
摘要：
尽管近年来在地理学领域取得了多项技术进步，使新的应用得以实现，并简化了合并的应用，一些任务仍然具有挑战性，低效，费时费力。这是狭窄空间的精确三维调查的情况。静态激光扫描是一种准确可靠的方法，但对于广泛的隧道环境是不切实际的；另一方面，便携式激光扫描是时间有效和高效的，但在没有地面控制约束的情况下不是很可靠。本文介绍了一种新颖的基于图像的多相机系统的开发过程，旨在解决这一特定问题：可靠,和有效的结果。从系统概念化和初步调查到设计选择和准确性要求，都说明了开发过程。所得到的工作原型已经进行了测试，以验证所提出的方法的有效性。
