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Method for measuring forest by unmanned aerial vehicle aerial photography remote sensing

An aerial photography and unmanned aerial vehicle technology, applied in the field of forest measurement, can solve the problems of large influence, low spatial and temporal resolution, large labor and labor input, etc., so as to avoid the cost of aircraft adjustment and shutdown, and to achieve high route control accuracy. , the effect of short lift-off preparation time

Inactive Publication Date: 2007-08-01
BEIJING FORESTRY UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] ① When setting up ground sample plots for regular measurement, the action is slow, the workload is large, a large amount of manual input is required, the cost is high, and the cycle is long;
[0004] ②The use of ordinary manned aerial remote sensing is relatively expensive due to the need for many links such as transitions, and it is difficult to carry out frequently, and the safety is poor;
[0005] ③When space satellite remote sensing is used for monitoring, the temporal and spatial resolution is low, and the flight altitude is above the clouds, so the image clarity is greatly affected by the clouds, and the forests are mostly distributed in mountainous areas with complex terrain, so the accuracy is low, while the high resolution remote sensing imagery is expensive, and is also limited by the revisit cycle and the influence of clouds
[0006] Therefore, in the process of forest resources investigation, when using traditional methods such as setting ground plots, manned aerial remote sensing and space satellite remote sensing, it will inevitably bring a lot of trouble and low efficiency.
Therefore, the existing technology has disadvantages such as high cost, long period, great influence by clouds, and poor security. How to reduce the cost, shorten the image update cycle, improve image clarity, and increase security without affecting the accuracy of aerial surveys has become an important issue. Problems to be Solved Urgently by Scientists and Technologists in the Field

Method used

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Embodiment Construction

[0025] UAV aerial photography remote sensing forest measurement technology is different from the existing technology and has been greatly improved, specifically:

[0026] UAV low-altitude aircraft is used as the remote sensing platform, which integrates ordinary digital camera, differential GPS and gyro platform, and uses digital photography technology to obtain low-altitude UAV remote sensing images with high ground resolution and large scale; through computer digital image processing system , for forest farms, according to the conformation rules of ground objects and image characteristics, the quantity and quality of forest stand investigation factors are identified and measured on images, and the tree measurement factors interpreted on images are: canopy density, tree height, tree crown diameter and tree number The equal factor is the function of the measured volume on the ground, and the aerial standing tree volume table and the aerial forest stand volume table are compiled...

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Abstract

This invention discloses one forest measurement method without human aviation cameral remote sensor, which adopts aviation device as remote platform without human and integrated digital codes camera, difference GPS and top platform, wherein, it uses digital camera technique to get high earth resolution rate without human remove image with large proportion rules fully in use of high flexible machine without special plane spot and capable of flying under clouds.

Description

1. Technical field [0001] The invention relates to a forest measurement technology in forest resource investigation, in particular to a method for forest measurement with aerial photography and remote sensing by unmanned aerial vehicles. 2. Technical Background [0002] The traditional method of forest resource survey is to set up ground sample plots for regular measurement and at the same time generally use aerial remote sensing and space satellite remote sensing to conduct forest resource surveys. However, the above-mentioned techniques have their obvious shortcomings and deficiencies: [0003] ① When setting up ground sample plots for regular measurement, the action is slow, the workload is large, a large amount of manual input is required, the cost is high, and the cycle is long; [0004] ②The use of ordinary manned aerial remote sensing is relatively expensive due to the need for many links such as transitions, and it is difficult to carry out frequently, and the safety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
Inventor 冯仲科林宗坚姚山
Owner BEIJING FORESTRY UNIVERSITY
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