CN102749330A

CN102749330A - Method for calculating tree age and annual ring width by using ordinary camera

Info

Publication number: CN102749330A
Application number: CN2012101386946A
Authority: CN
Inventors: 冯泽民
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2012-10-24

Abstract

The present invention discloses a method for calculating a tree age and an annual ring width by using an ordinary camera. According to the present invention, a special transparent cross rule is placed on a root crown position on a chopped tree by adopting pith as a circle center, wherein the cross rule has a cross type, and is transparent, a width of the rule is 1 cm, four directions of the cross rule is engraved with length scales, and each length scale is 25 cm; an ordinary camera is adopted to shoot annual rings placed with the cross rule, and a result is recorded; the cross rule on the photo is adopted to establish a coordinate system, one rule part of the cross rule is adopted as an X axis, one rule part is adopted as a Y axis, rule center of the cross rule is adopted as a coordinate origin, a coordinate relation is established through the coordinate of the photo and the scale of the cross rule, and intersection point coordinates of various annual ring lines and the coordinate axis are respectively obtained; and finally an annual ring width is calculated by using the coordinate difference between intersection points of two adjacent annual ring lines.

Description

A kind of method of utilizing general camera measuring and calculating trees age and annual ring width

One, technical field

The present invention relates to a kind of method of in the forestry investigation, measuring the tree age of tree under the closing environment, particularly a kind of method of utilizing general camera measuring and calculating trees age and annual ring width.

Two, technical background

Up to the present, the age of tree is mainly measured with the tree ring method.The long autumn in annual spring of trees ends, and on the trunk cross section, forms the circle of density interphase, is referred to as annual ring.Annual one take turns (or two take turns), the age number on the trees cross section is represented the age of this tree.Mostly the method for the general calculating annual ring that adopts is on-the-spot directly measures or section is taken back the laboratory and measured, and so just very inconvenience, and many instruments also is not easy to obtain, and at the breadboard annual ring appearance core also side of occupation of land, is difficult for preservation.Therefore, in the forest inventory investigation process, adopt traditional tree ring method to measure and brought a lot of troubles and error inevitably.

The instrument and equipment that aspect forestry, does not still have at present the convenient and practical measurement age of tree; The present invention is simple light and handy, precision is high, be convenient for carrying, valency is low practical; Be expected in the forestry investigation, to be widely used; With the ten hundreds of forestry grass-roots unit in the whole nation and technician, and needs to the global forestry, prospect is considerable really.

Three, summary of the invention

In order to overcome a lot of troubles and the error that existing assize method in age is brought inevitably in the mensuration process, the purpose of this invention is to provide the technical method that a kind of general camera is measured the trees age.

The objective of the invention is to realize like this:

1. in the number collar position of having cuted down, be that special transparent Cross ruler is placed in the center of circle with the medulla, Cross ruler is cross, transparent, and blade 1cm is wide, and 4 directions of cross are carved with length, and each 25cm is long.Clear inadequately like tree ring, also use of the annual ring dyeing of dyeing pen with the ruler end part branch of Cross ruler, use general camera to take annual ring and the record that is placed with Cross ruler.

2. utilize the Cross ruler on the photo to set up coordinate system; With a bar rule of Cross ruler as the X axle; An other bar rule is as the Y axle; As true origin, set up the coordinate relation with the chi heart of Cross ruler, obtain the intersecting point coordinate of each bar annual ring line and coordinate axis respectively through the coordinate of photo itself and the scale of Cross ruler; At last, utilize the intersecting point coordinate difference of adjacent two annual ring lines to try to achieve annual ring width.

This invention has the following advantages:

1. simplified measure the trees age process with step and make things convenient for achievement preserved;

2. various physical environments and weather conditions errors caused have been overcome;

3. the workload and measurement difficulty of survey crew have been significantly reduced;

Four, embodiment:

Utilize the method for general camera measuring and calculating trees age and annual ring width different, done significant improvement with art methods, specifically:

Adopt camera Cross ruler and interior industry to handle original field work mode that replaced; On age, North and South direction is placed Cross ruler the trees of needs investigation, and the chi heart is at trees medulla place; Vertically take with ordinary digital camera, guarantee that as far as possible the Cross ruler on the photo also is a North and South direction.Write down this trees coordinate and other information.Preserve photo and take back interior industry processing.

On computers, obtain the annual ring line coordinates with visual interpretation or software interpretation.

Visual interpretation, according to the image feature on the captured photograph, identifying annual ring number of lines N is the trees age; Then, on captured photograph, set up rectangular coordinate system according to the Cross ruler of being placed, initial point is the Cross ruler center, and the X axle is the Cross ruler east-west direction, and the Y axle is the Cross ruler North and South direction, obtains the intersecting point coordinate of each bar annual ring line and coordinate axis respectively; At last, utilize the intersecting point coordinate difference of adjacent two annual ring lines to try to achieve annual ring width.

The software interpretation utilizes the long 50CM of Cross ruler to calculate the standard length on the photo, utilizes gray analysis to obtain the photographic coordinate of each annual ring line, thereby calculates annual ring and annual ring width.

Claims

1. a method of utilizing general camera measuring and calculating trees age and annual ring width is characterized in that: utilize general camera and Cross ruler that age and the annual ring width of cuting down trees are measured.

2. a kind of method of utilizing general camera measuring and calculating trees age and annual ring width according to claim 1; It is characterized in that: wherein the method for making of Cross ruler is following: the Cross ruler blade is transparent; The wide 1cm of blade, 4 directions of Cross ruler are carved with scale, and length is 25cm.

3. a kind of method of utilizing general camera measuring and calculating trees age and annual ring width according to claim 1; It is characterized in that: the method for age and annual ring width of wherein cuting down trees is following: at first; The trees collar position of cuting down; The medulla of cuting down trees is overlapped with the center of Cross ruler, and utilize camera vertically to take; Secondly, according to the image feature on the captured photograph, identifying annual ring number of lines N is the trees age; Then, on captured photograph, set up rectangular coordinate system according to the Cross ruler of being placed, initial point is the Cross ruler center, and the X axle is the Cross ruler east-west direction, and the Y axle is the Cross ruler North and South direction, obtains the intersecting point coordinate of each bar annual ring line and coordinate axis respectively; At last, utilize adjacent two annual ring lines the intersecting point coordinate difference try to achieve annual ring width.