Standing tree diameter measurement method and device, computer device and storage medium

CN121544688BActive Publication Date: 2026-06-19BEIJING FORESTRY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING FORESTRY UNIVERSITY
Filing Date
2025-11-12
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing techniques for measuring the diameter at breast height (DBH) of standing trees suffer from problems such as low efficiency, high labor intensity, and large measurement errors, making it impossible to balance efficiency and accuracy.

Method used

By setting up rectangular positioning markers with four corner points in the target tree breast height area, taking pictures of the standing tree with a camera and obtaining the camera's inherent parameters and the actual size information of the positioning markers, an image space coordinate system is established, the spatial pose parameters of the camera are determined, the pixel positions of the tree trunk image and the positioning markers are accurately identified, and the diameter of the breast height section is calculated.

Benefits of technology

It enables efficient and accurate measurement of standing tree diameter at breast height (DBH), adapts to complex terrain, reduces labor intensity, improves measurement efficiency, and meets the accuracy requirements of forestry surveys.

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Abstract

This application relates to a method, apparatus, computer equipment, and storage medium for measuring the diameter at breast height (DBH) of standing trees. Rectangular positioning markers with four corner points are placed in the target DBH area of ​​the standing tree to be measured. An image of the standing tree, including the trunk and positioning markers, is captured using a camera, simultaneously acquiring the camera's inherent parameters and the actual size information of the positioning markers. The pixel positions of the trunk image and each corner point of the positioning markers in the standing tree image are identified, and the size information of the positioning markers in the image is calculated, thereby establishing a first image spatial coordinate system. Simultaneously, the spatial pose parameters of the camera relative to the first image spatial coordinate system are determined based on the camera's inherent parameters, the pixel positions of the positioning markers, and the actual size information. Finally, based on the established first image spatial coordinate system and the camera's spatial pose parameters, the projection area of ​​the DBH section of the standing tree to be measured in the trunk image is determined. Then, by analyzing the edge pixels of the projection area, the diameter of the DBH section is calculated as the DBH.
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