Accumulated profile space structure information analysis method based on motion sensing photographing technology
A technology of information analysis and spatial structure, applied in photogrammetry/video surveying, measuring devices, instruments, etc., can solve the problems of lack of three-dimensional spatial information measurement and research of accumulation profile, time-consuming and labor-intensive measurement data, and high risk.
Inactive Publication Date: 2016-07-06
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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[0003] The information source of this type of measurement method is the local two-dimensional information of the accumulation profile, lack of measurement and research on the three-dimensional spatial information of the accumulation profile, so it is impossible to objectively and comprehensively reflect the spatial information of the accumulation profile, and it is even more difficult to realize multi-phase analysis of complex accumulation profiles The identification and extraction of spatial information cannot support the stability analysis of accumulation profiles
Moreover, it takes time and effort to obtain a large amount of measurement data with this type of traditional measurement method; especially in high slopes or harsh environments, measurement personnel cannot approach the accumulation surface, which is very dangerous
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Embodiment 1
[0035] Step S1, hold a Kinectv2 somatosensory camera and aim at the section from any angle placed on the accumulation section, and lock an area of 2 square meters, such as figure 1 As shown; and then hold the kinectv2 to move around the selected area and change the viewing angle to refine and reconstruct the point cloud. When the point cloud refinement effect is satisfied and the point cloud per square meter is more than 500,000 points, the point cloud file is generated. ,Such as figure 2 shown; then use PCL to read in the point cloud, and display the point cloud image in the CloudViewer software of PCL, such as image 3 As shown, in this step, if a point cloud with too much data is debugged, the software can use pcl::VoxelGrid to down-sample to reduce the data amount; next, after setting the point cloud parameters, divide the point cloud section and determine the section plane The four parameters of ax+by+cz+d=0 are implemented in PCL by using RANSAC’s pcl::SACSegmentatio...
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The invention discloses an accumulated profile space structure information analysis method based on motion sensing photographing technology. The method comprises the following steps: scanning an accumulated profile with a motion sensing camera, and fusing profile scanned image data to obtain point cloud data; setting point cloud parameters, dividing a point cloud profile, and determining four parameters of a profile plane, wherein the four parameters meet that ax+by+cz+d=0; dividing the profile according to a point cloud partitioning algorithm, converting a three-dimensional curved coordinate system into a two-dimension planar coordinate system X-O-Y, projecting all points in point cloud onto a two-dimension profile, and converting height value into gray value; and finally, diving a two-dimension image, and performing reverse solution to obtain the grain size and space instructure information of stones. According to the invention, three-dimension space information of a high and steep accumulated profile is reconstructed by the motion sensing photographing algorithm, and thus the geometrical information, the space structure and fabric, the deposition height and stage information of stones of the accumulated profile are extracted and the accumulation extent is estimated, so as to support reconstruction of places suffered from old hazards, analysis of geomorphic evolution, analysis of stability of accumulated bodies, route selection and design of projects, etc.
Description
technical field [0001] The invention belongs to the field of geological engineering measurement, and in particular relates to a method for analyzing spatial structure information of accumulation sections based on somatosensory photography technology. Background technique [0002] At present, in the research fields of geology, geomorphology, and water conservancy, the spatial structure information of accumulation profiles is one of the most important basic data in engineering geology and hydraulic engineering. Tape photogrammetry method: pull the tape measure horizontally or vertically along the partial section of the accumulation profile, take photos with a camera, obtain continuous photos of the partial section, then stitch the photos indoors, and estimate the size of the particle size through the reference object or the scale of the tape measure , distribution, and material composition ratio of different particle sizes, and then deduce the spatial information of the entire...
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IPC IPC(8): G01C11/00
CPCG01C11/00
Inventor 葛永刚严炎崔鹏苏凤环
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI