Micro tunnel excavation is limited to straight paths due to size constraints that prevent human entry through the jacking pipes. A compact, wide-angle system enables the measurement of enclosed spaces with complex paths. This paper proposes a 3D estimation method using a catadioptric imaging system, which consists of an omnidirectional camera and a single spherical mirror, to capture monocular images without relying on training data. The applicability of our method is demonstrated by measuring the geometry of a pipe designed to imitate a propulsion pipe used in tunnel excavation.
At resource mining sites, drilling into the ground and bedrock often occurs in geological surveys and blasting explosives filling. However, extracting core samples from underground boreholes is time-consuming, labor-intensive, and difficult to evaluate quantitatively. Visualization of boreholes, which is realized by computer vision technology, allows engineers to evaluate the geological characteristics of underground rocks to determine trajectories and overall budgets. With the help of VR (Virtual Reality) simulation, this research develops a multi-view fiberscope camera system, which obtains videos of a borehole to generate a high-quality 3D borehole model by using one of the 3D photogrammetric techniques, Structure from Motion (SfM).
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.