Method for measuring diameter at breast height and tree height with camera

A technology of tree height and diameter at breast height, which is applied in the field of measuring diameter at breast height and tree height by using a camera, can solve the problems of low efficiency and high cost, and achieve the effect of reducing workload, improving automation and cheap price

Inactive Publication Date: 2013-06-19
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the low efficiency and high cost of existing tree measuring methods, and to measure trees conveniently and quickly, the purpose of this invention is to p...

Method used

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  • Method for measuring diameter at breast height and tree height with camera
  • Method for measuring diameter at breast height and tree height with camera
  • Method for measuring diameter at breast height and tree height with camera

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Experimental program
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Embodiment Construction

[0017] The general digital camera tree measurement method is different from the existing method and has been greatly improved, specifically:

[0018] Measure tree height and diameter at breast height with ordinary digital camera, first select the tree to be measured, place a cross ruler in the plot in front of the tree, keep the level level, turn the ruler to 90° direction, and use the line-of-sight method to measure the camera placement Point the distance L to the cross ruler, and then use an ordinary digital camera to aim at the ruler erected on the plot, take a panoramic shot in a direction perpendicular to the ruler, and establish a plane image square rectangular coordinate system o-xy based on the photo, and then use In the photo, establish a three-dimensional object-space Cartesian coordinate system O-XYZ, using the coordinates on the cross ruler to obtain the object-space coordinates and image-space coordinates of the corresponding 16 pixels on the photo, and use the coo...

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Abstract

The invention discloses a method that under the condition that a standing tree is not hewed down, the height of the standing tree, the diameter and the growing stock of any place of the standing tree are measured, and particularly, through the method of edge extraction of a forest in a digital photo, relevant data are measured. The stereoscopic photograph is applied to the forestry, the standing tree does not need to be hewed down, and the height of the standing tree, the diameter and the growing stock of any place of the standing tree can be measured, the new method is brought to the comprehensive analysis of growth conditions of trees, and the method enables forestry investigation to be more convenient and accurate. The method that the common camera is used for carrying out stereoscopic photograph tree measurement is simple and easy to operate, as long as people strictly operate according to technical requirements, the satisfactory investigation result can be obtained.

Description

1. Technical field [0001] The invention relates to measuring the height of standing trees, the diameter and accumulation of any part without felling the standing trees, and particularly proposes to measure relevant data by extracting the borders of digital photos. 2. Technical background [0002] Dazier invented photography in 1839, and then in 1858, the Parisian photographer Nada first carried out photographic experiments from the air to the ground. In the mid-nineteenth century, the Frenchman Laussedat researched the application of measuring cameras to take ground photos to draw topographic maps. Pulfrich in Germany in 1901 and Fourcado in South Africa in 1903 respectively researched and produced a three-dimensional coordinate measuring instrument, which developed into ground three-dimensional photogrammetry. In 1838 Wheatstne invented the stereoscope. In 1907, the Jena Zeiss factory designed the first three-dimensional automatic mapper, which further improved the mappin...

Claims

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Application Information

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IPC IPC(8): G01B11/08
Inventor 冯仲科樊仲谋郭欣雨樊江川高原
Owner BEIJING FORESTRY UNIVERSITY
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