A simple method and device for measuring the height of buildings

Abstract

The invention discloses a simple building height measuring method and a simple building height measuring device. The simple building height measuring method comprises the following steps: placing a calibration board equipped with a vertical rod on the ground where a building is positioned; shooting to obtain a complete height line picture of the calibration board and the building in the height direction; marking a high point e and a low point b of the vertical rod and a high point f and a low point a of a building height line on the picture, extending two pairs of parallel lines of the calibration board to obtain two vanishing points and connecting to obtain a horizon line; connecting the point b and the point a, extending to intersect with the horizon line at an intersection point c, connecting the point c and the high point e, and extending to intersect with the height line at an intersection point d; extending eb and the height line fa to intersect at a point g; by a projective transformation method, constructing a linear cross ratio invariant relational expression of a projective picture and the world coordinate system, calculating the pixel value of each line segment on the picture, substituting into the relational expression and calculating the actual length of the building height line. Through the simple building height measuring method and the simple building height measuring device, the actual height of the building can be quickly and accurately calculated; the advantages of low cost, simple operation, convenience in use and the like are achieved.

Description

Technical field [0001] The present invention relates to a simple building height measurement method and device belonging to the technical field of measuring equipment. Background technique [0002] In engineering practice, people often need to get the height of the building to determine whether the settlement of the building meets the requirements. At present, the highly measured equipment of the building is mostly used by laser measurement. This method is expensive, complicated, and has a certain requirement for the technical level of the person. [0003] The photographing measurement is the image obtained by the optical camera, which is processed to obtain the shape, size, position, characteristics, and interrelationship of the subject. It includes: obtaining an image of the subject, a processing method of a single array or a plurality of image portraits, including theory, equipment, and technology, and outputs the measured results or digital form Methods and equipment. Its mai...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing method cannot integrate photogrammetry when measuring buildings, and cannot quickly and accurately calculate the actual height of the building through photography, which reduces the measurement efficiency. The present invention provides a simple The building height measurement method and device, using photogrammetry technology combined with the calibration board, can simply and quickly measure the building height

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