A Fast Volume Measurement Method Based on Space Invariant Property

Abstract

The present invention provides a fast volume measurement method based on space-invariant characteristics. The method includes: extracting and matching feature points and three-dimensional reconstruction of the acquired image; adding the actual distance between feature points and the The distance ratio between the relative coordinate system and the real world is used as the scale information; the three-dimensional coordinates of the feature points are used to construct the Delaunay triangular mesh, and the boundary edge detection elements are added to fit the optimal reference plane; according to the idea of ​​discrete integrals, the triangular mesh Projected onto the datum plane, find the volume of the irregular object surrounded by the triangular network. You can use "one camera, one ruler" to complete the measurement of the actual distance between all the feature points of the object, which saves the trouble of field measurement; at the same time, when constructing the Delaunay triangular mesh, a data structure for detecting boundary edges is added, which can effectively The peripheral datum plane of the formed boundary surface is obtained, which is further used for volume calculation.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method for automatically calculating the volume of an irregular body by using close-range photography technology in land survey. Background technique [0002] Land is a precious natural resource for human survival and development, and the sustainable use of land is the cornerstone of the sustainable development of human society. Today, with the increasing population, especially in our country, the land is under enormous pressure, and the relationship between man and land is becoming increasingly tense. After the efforts of the "Tenth Five-Year Plan" and the "Eleventh Five-Year Plan", modern high-tech means such as "watching from the sky, checking on the ground, and online management" have been fully applied in the fields of land supervision and land surveying. Aviation, aerospace remote sensing technology and GPS global positioning System and other spatial technologies have als...

AI Technical Summary

Problems solved by technology

The GNSS-based measurement method has a complicated process and high requirements for the staff. The layout of the points is greatly affected by the terrain, and the transition is slow. It is very unsuitable for automatic measurement and monitoring; while using a tape measure, there are a lot of field work, which is only suitable for Small area measurement, and it is less suitable for irregular body measurement, human inaccessible or more dangerous areas

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