METHODS FOR CALIBRATING A DIGITAL PHOTOGRAPHIC IMAGE OF UTILITY STRUCTURES
First Claim
1. A method of calibrating a digital photographic image of one or more utility structures, comprising the steps ofa) collecting a digitized photographic image of a utility structure,b) collecting low-density LiDAR data and generating sparse three-dimensional point cloud data from said low-density LiDAR data,c) merging the three-dimensional point cloud data with the digital photograph, andd) determining matrices such that each pixel of the digital photograph is associated with a coordinate obtained from the point cloud.
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Abstract
The present invention relates to methods of performing precise measurements of utility poles, utility-pole attachments and connected spans for the purpose of load analysis, safety analysis, and related tasks using low density sparse LiDAR data to pre-compute the matrices required to perform precise photogrammetric analysis of utility poles, utility-pole attachments and connected spans as imaged by a camera with a known spatial geometry relative to a LiDAR sensor.
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Citations
17 Claims
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1. A method of calibrating a digital photographic image of one or more utility structures, comprising the steps of
a) collecting a digitized photographic image of a utility structure, b) collecting low-density LiDAR data and generating sparse three-dimensional point cloud data from said low-density LiDAR data, c) merging the three-dimensional point cloud data with the digital photograph, and d) determining matrices such that each pixel of the digital photograph is associated with a coordinate obtained from the point cloud.
Specification