CN106197336A - A kind of Photographic technique is without the principle of timber volume model auto-measuring standing volume and method - Google Patents

Abstract

The invention discloses a kind of Photographic technique without the principle of timber volume model auto-measuring standing volume and method, it is characterized in that by trees are taken pictures, then measure diameter of a cross-section of a tree trunk 1.3 meters above the ground value, diameter of a cross-section of a tree trunk 1.3 meters above the ground value is made ratio with the pixel wide shared by the diameter of a cross-section of a tree trunk 1.3 meters above the ground in photo, finally tries to achieve the overall volume of timber of single trees.

Description

A kind of Photographic technique is without the principle of timber volume model auto-measuring standing volume and method

One, technical field

The present invention relates to forest management's technical field, be particularly directed in lowered in field environment, the method utilizing photography, to tree The technology of calculation measured roughly by the volume of timber of wood.

Two, technical background

In the middle of work on forestry, measuring the indices required for the trees volume of timber (height of tree, the diameter of a cross-section of a tree trunk 1.3 meters above the ground is equivalent) needs specialty Instrument, the most suitable landform, concrete operations are got up because the conversion of environmental factors can be relatively difficult.Photographic technique is without timber volume model certainly It is a kind of operation simple, easy, a kind of accurate method measuring the trees volume of timber that momentum surveys standing volume.And there is cost Low, efficiency advantages of higher.

Three, summary of the invention

The present invention is a kind of Photographic technique without the principle of timber volume model auto-measuring standing volume and method, by clapping trees According to.Then measure breast neck value, the pixel wide shared by the diameter of a cross-section of a tree trunk 1.3 meters above the ground in breast neck value and photo made ratio:

$a_1=\frac{d}{d_x}$

(wherein d is diameter of a cross-section of a tree trunk 1.3 meters above the ground value, has measured and has obtained a result, and dx is the pixel wide accounted at the diameter of a cross-section of a tree trunk 1.3 meters above the ground in photo)

a₁Ratio for actual range in horizontal direction Yu pixel wide.

Then by 1.3 meters and photo footpath make ratio to pixel wide shared between the diameter of a cross-section of a tree trunk 1.3 meters above the ground:

$a_2=\frac{h_{1.3}}{h_y}$

(wherein h_1.3Being 1.3 meters, hy is 1.3 meters of shared pixel wide in photo)

a₂Ratio for actual range on vertical direction Yu pixel wide.

On this basis, we just can measure the distance of a certain position of trees in photo and optional position roughly, so Afterwards by a kind of universal trees volume of timber measuring method:

Arriving the calculating of the trees volume of timber at the diameter of a cross-section of a tree trunk 1.3 meters above the ground over the ground at footpath, can be considered as this section of trees is cylinder then (h_1.3=1.3m):

$V_1=\frac{1}{4}{{\mathrm{\πd}}_{1.3}}^2{h}_{1.3}$

To arriving d at the diameter of a cross-section of a tree trunk 1.3 meters above the ground_nPlace's trees volume of timber, can obtain i.e. according to the computational methods of platform columnar volume:

$V_n=\frac{1}{12}\mathrm{\π}({d_n}^2+{d_{n-1}}^2+d_n{d}_{n-1})h_n$

To d_nThe trees volume of timber at treetop, can obtain i.e. according to the computational methods of cone:

$V_{n+1}=\frac{1}{12}{{\mathrm{\πd}}_n}^2(H-h_n-h_{n-1}\mathrm{\Λ}-h_{1.3})$

And the overall volume of timber of single trees, the n+1 section volume of timber it is added and obtains:

V=V₁+(V₂+Λ+V_n)+V_n+1

Four, detailed description of the invention:

Implementation:

1, on the spot, measure single standing tree diameter of a cross-section of a tree trunk 1.3 meters above the ground value and at the diameter of a cross-section of a tree trunk 1.3 meters above the ground, draw white line.

2, trees are taken pictures (level should be kept with honest)

3, by pixel opening relationships at diameter of a cross-section of a tree trunk 1.3 meters above the ground value and the diameter of a cross-section of a tree trunk 1.3 meters above the ground.On this basis, photo can be measured by the method for line In certain point to another point length value.

4, at this moment, we can calculate height of tree H in photo, and chooses above many places point (1/2nd of tree at the diameter of a cross-section of a tree trunk 1.3 meters above the ground Above) and calculate the diameter that each point is corresponding.Then in photo, calculate the spacing between each point.At this moment, d₂Height h to treetop₃ Just it is H-h_n-h_n-1Λ-h_1.3.Substitute into three-stage process to survey in volume equation, just can obtain the volume of timber of this standing tree.

Claims (1)

1. the present invention is a kind of Photographic technique without the principle of timber volume model auto-measuring standing volume and method, by clapping trees According to, then measure diameter of a cross-section of a tree trunk 1.3 meters above the ground value, diameter of a cross-section of a tree trunk 1.3 meters above the ground value is made ratio with the pixel wide shared by the diameter of a cross-section of a tree trunk 1.3 meters above the ground in photo, and then pixel value can be passed through Calculate actual value；Then the trees volume of timber is calculated according to surveyed data according to the mathematical model calculating the trees volume of timber.