Rapid volume measurement method based on spatial invariant feature

Abstract

The invention provides a rapid volume measurement method based on a spatial invariant feature. The method comprises the steps that feature point extracting and matching and three-dimensional reconstruction are performed on acquired images; the distance proportion of the actual distances among feature points to the real world in a relative coordinate system is added in three-dimensional point cloud to serve as scale information; a Delaunay triangular mesh is built by utilizing a three-dimensional coordinate of the feature points, boundary edge detection elements are added, and an optimal datum plane is fit; the triangular mesh is projected to the datum plane according to the discrete integral thought to determine the volume of an irregular object surrounded by the triangular mesh. The measurement of the actual distances among all the feature points of an object can be completed by utilizing a camera and a ruler, and the trouble of field measurement can be omitted; meanwhile, a data structure used for detecting the boundary edge is added when the Delaunay triangular mesh is built, the peripheral datum plane constituting a boundary curve surface can be effectively obtained, and the method can be further used in 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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