Standing tree information acquisition method and device based on images

Abstract

The invention relates to a standing tree information acquisition method and device based on images. The method comprises the steps that calibration parameters of a camera are obtained, and the calibration parameters are coordinate transformation parameters between a world coordinate system and an image coordinate system; the images which include measured standing trees and are photographed based on the calibration parameters are obtained; the number of pixels corresponding to the measured parameters of the measured standing trees in the images is metered; and the measured parameters of the measured standing trees are calculated according to the number of the pixels corresponding to the measured parameters, the number of the pixels corresponding to a reference object in the images photographed based on the calibration parameters and the coordinates of the reference object in the world coordinate system inversely calculated based on the calibration parameters. According to the technical scheme, standing tree information acquisition convenience and information acquisition efficiency can be effectively enhanced, and realization cost of standing tree information acquisition can be reduced at a larger extent.

Description

technical field [0001] The invention relates to the technical field of forestry, in particular to an image-based standing tree information collection method and an image-based standing tree information collection device. Background technique [0002] Standing tree information mainly includes: standing tree height and standing tree diameter at breast height, etc. Collecting standing tree information is one of the important contents of forest resource survey and operation design, and the accuracy of collected standing tree information will directly affect the quality of forest resource survey and the analysis results of forest growth status. [0003] The traditional collection method of standing tree information is: measure the height of the standing tree with measuring tools such as the Bruce altimeter, and measure the diameter at breast height of the standing tree with measuring tools such as girth or calipers. [0004] With the continuous development of technology, profess...

AI Technical Summary

Problems solved by technology

[0005] The inventor found in the process of realizing the present invention that the traditional collection method of standing tree information mainly adopts optical and mechanical principles because of its measuring tools, therefore, information collection has certain requirements on the observation environment, such as the observation environment is not open enough, and the trunks are closely connected to each other. In the occluded scene, there is a certain difficulty in information collection; in addition, due to the need to manually estimate the standing tree position for measuring the DBH, manually read the measurement data, and manually record the measurement data, the information collection method reduces the efficiency of information collection and the accuracy of information collection. However, the use of highly specialized precision instruments for information collection has problems such as high cost of information collection equipment, professional operation is required, and the scope of application of the equipment is limited and it is not easy to carry.

Images