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Full-Text Articles in Engineering
Real-Time 3-D Reconstruction By Means Of Structured Light Illumination, Kai Liu
Real-Time 3-D Reconstruction By Means Of Structured Light Illumination, Kai Liu
University of Kentucky Doctoral Dissertations
Structured light illumination (SLI) is the process of projecting a series of light striped patterns such that, when viewed at an angle, a digital camera can reconstruct a 3-D model of a target object's surface. But by relying on a series of time multiplexed patterns, SLI is not typically associated with video applications. For this purpose of acquiring 3-D video, a common SLI technique is to drive the projector/camera pair at very high frame rates such that any object's motion is small over the pattern set. But at these high frame rates, the speed at which the incoming video can …
Detection Of Roof Boundaries Using Lidar Data And Aerial Photography, Andrew David Gombos
Detection Of Roof Boundaries Using Lidar Data And Aerial Photography, Andrew David Gombos
University of Kentucky Master's Theses
The recent growth in inexpensive laser scanning sensors has created entire fields of research aimed at processing this data. One application is determining the polygonal boundaries of roofs, as seen from an overhead view. The resulting building outlines have many commercial as well as military applications. My work in this area has created a segmentation algorithm where the descriptive features are computationally and theoretically simpler than previous methods. A support vector machine is used to segment data points using these features, and their use is not common for roof detection to date. Despite the simplicity of the feature calculations, the …
Novel Approaches In Structured Light Illumination, Yongchang Wang
Novel Approaches In Structured Light Illumination, Yongchang Wang
University of Kentucky Doctoral Dissertations
Among the various approaches to 3-D imaging, structured light illumination (SLI) is widely spread. SLI employs a pair of digital projector and digital camera such that the correspondences can be found based upon the projecting and capturing of a group of designed light patterns. As an active sensing method, SLI is known for its robustness and high accuracy. In this dissertation, I study the phase shifting method (PSM), which is one of the most employed strategy in SLI. And, three novel approaches in PSM have been proposed in this dissertation. First, by regarding the design of patterns as placing points …