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A method for measuring the area of ​​a plot by monolithic photography with a ranging camera

A technology of plots and cameras, applied in photogrammetry/video metrology, surveying devices, surveying and navigation, etc., can solve problems such as difficult access by humans, and achieve the effect of convenient measurement and calculation of plot area

Active Publication Date: 2020-10-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that some plots are difficult to reach manually in actual construction, this method provides convenience

Method used

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  • A method for measuring the area of ​​a plot by monolithic photography with a ranging camera
  • A method for measuring the area of ​​a plot by monolithic photography with a ranging camera
  • A method for measuring the area of ​​a plot by monolithic photography with a ranging camera

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] 1. Establish the space coordinate system and the object space coordinate system, and mark the corresponding coordinates of a certain point;

[0019] 2. Measure the distance between the camera and a certain point in the plot, and find the coordinate Y i

[0020] 3. Calculate the coordinates of all required feature points, and calculate the area of ​​the target plot.

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Abstract

The invention relates to a method for measuring a parcel area by virtue of single-picture photographing of a distance measurement camera. The method is characterized by comprising the following steps:setting a distance measurement camera at one point outside a measured parcel, and establishing an object space coordinate system S-XYZ by taking the point outside the measured parcel as an original point; establishing an image space coordinate system f-uv by taking the central point of the parcel as a coordinate original point, establishing an equation formula (1) according to a conversion proportion relation between the two coordinate systems, and obtaining formulae from the formula (1), wherein (Xi, Yi and Zi) is an image space coordinate of one point in the measured parcel, and (Ui and V1)is an object space coordinate of one point in the measured parcel; and obtaining Yi according to a formula, wherein D1 is the distance from the camera to the measured point in the parcel, and Di0 isthe distance from the camera to the central point of the parcel and is known, (all formulae are represented in description).

Description

[0001] 1. Technical field [0002] The method relates to a method for measuring the area of ​​a plot, in particular to a method for calculating the area of ​​a plot by using a single photo in photogrammetry. [0003] 2. Technical background [0004] Photogrammetry has been widely used in various industries to draw topographic maps of various scales, establish digital ground models, and provide basic data for various geographic information systems and land information systems. Since the measurement and interpretation are carried out on the image, there is no need to touch the object itself, and it is rarely restricted by climate, geography and other conditions; the photography is like a true reflection of the objective object or target, with rich information and intuitive image, and people can get all the benefits from it. Study a large amount of geometric and physical information of objects; suitable for large-scale topographic surveying and mapping, with fast and high efficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00
CPCG01C11/00
Inventor 冯仲科练一宁邱梓轩
Owner BEIJING FORESTRY UNIVERSITY