A Yongping Compass Loaded with Laser Stepless Scale for SFM 3D Modeling

Abstract

The invention discloses a Yongping compass loaded with a laser stepless scale for SfM three-dimensional modeling, and relates to the technical field of three-dimensional model correction. The invention includes a telescopic rod and a Yongping compass. The distance between the front end and the laser source; its base is a container made of light-weight, compressive-resistant and freely deformable material, which contains liquid, and the compass perpendicular to it is always horizontal by using a density greater than the liquid and a sharp-bottomed upright rod. The compass and telescopic The included angle of the rod is the azimuth angle of the telescopic rod. Compared with the RTK-GPS (real-time dynamic carrier phase difference technology) coordinate correction method, the present invention has the advantages of light weight, pressure resistance, stepless scale within the design range, and no need for satellite signals. A SfM 3D model correction method system that can be air-dropped, is more suitable for field operations in different environments, and can be applied to many fields such as construction, water conservancy engineering, civil engineering, geology, geography, and military affairs.

Description

technical field [0001] The invention relates to the technical field of three-dimensional model correction, in particular to a Yongping compass loaded with a laser stepless scale for SfM three-dimensional modeling. Background technique [0002] In the process of using SfM (Structure from Motion, motion recovery structure) to restore fine scene structure and extract information, model size and attitude control are crucial, especially in the field of field operations such as architecture, civil engineering, earth science and military. Because these fields require the correct size, attitude and relative geographical relationship, this is the premise for the correct extraction of geometric parameters in the next step. Usually, if there are no control points in the actual scene, applying SfM to a series of unordered images will generate a dense point cloud in a relative or arbitrary coordinate system, and the point cloud model is scaled and rotated relative to the real world. The...

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Problems solved by technology

For example, place a light-weight plastic plate with orientation and size scales horizontally in the ROI in advance, and since its attitude matrix and the attitude matrix in the model are known, the rotation matrix between the two can be calculated, and then applied to the entire The model can meet the calibration requirements. This method can generate a model within a millimeter error and a five-degree deviation. However, this method can only be placed manually, and the process is more complicated. Therefore, a loading laser for SfM 3D modeling is required. Yong Peng Compass

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