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

A technology of tree rings and trees, which is applied in the field of measuring the age and width of tree rings with ordinary cameras, can solve problems such as troubles and errors, and achieve the effects of overcoming measurement errors, convenient storage, reducing workload and measurement difficulty

Inactive Publication Date: 2012-10-24
冯泽民
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Problems solved by technology

[0004] In order to overcome the many troubles and errors that the existing methods for measuring the age of trees inevitably bring during the

Method used

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Embodiment Construction

[0012] The method of measuring tree age and annual ring width using common cameras is different from the prior art method, and has been greatly improved, specifically:

[0013] The original field operation method is replaced by camera cross ruler and in-house processing. For the age of the trees to be investigated, a cross ruler is placed in the north-south direction, and the center of the ruler is at the pith center of the tree. Take vertical photos with an ordinary digital camera to ensure that the photos are as accurate as possible. The crosshairs are also north-south. Record the tree coordinates and other information. Save photos and bring them back to the office for processing.

[0014] On the computer, use visual interpretation or software interpretation to obtain the annual ring line coordinates.

[0015] Visually judge, according to the image features on the photographs taken, identify the number of annual ring lines N as the age of the tree; then, establish a Cartes...

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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

1. Technical field [0001] The invention relates to a method for measuring tree age in a canopy environment in forestry investigation, in particular to a method for measuring tree age and annual ring width by using an ordinary camera. 2. Technical Background [0002] Until now, tree age has been mainly measured using the tree ring method. Trees last in spring and autumn every year, and form dense and alternate circles on the trunk section, which are called annual rings. One round (or two rounds) per year, the age number on the tree section represents the age of the tree. The commonly used methods for calculating annual rings are mostly on-site direct measurement or taking slices back to the laboratory for measurement, which is very inconvenient, and many tools are not easy to obtain, and the annual ring sample cores in the laboratory also take up space. Not easy to save. Therefore, it is inevitable to bring a lot of troubles and errors in the process of forest resource inv...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01B11/02
Inventor 冯泽民
Owner 冯泽民
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