Standing tree height measuring system and method based on machine vision
A technology of machine vision and measurement methods, applied in neural learning methods, instruments, image data processing, etc., can solve the problems of high cost of precision instruments, inconvenient measurement operation, and restrictions on the use environment, and achieve high versatility, simple operation, and high Effects of generality and applicability
Pending Publication Date: 2021-12-24
GUANGXI UNIV
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Problems solved by technology
However, the cost of precision instruments is relatively high, and some instruments require professional operating techniques, and are easily restricted by the use environment
For non-forestry professionals, it is more difficult to use these tools, which is very inconvenient in actual measurement operations
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[0039] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention. In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are ...
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The invention discloses a standing tree height measuring method based on machine vision. The standing tree height measuring method comprises the following steps: 1, a camera calibration method with nonlinear distortion is adopted to calibrate an Android smart phone camera; nonlinear distortion parameters and internal and external parameters of the camera are extracted; meanwhile, perspective distortion correction based on point operation is carried out on a standing tree image needing to be measured. According to the invention, a portable smart phone is used for acquiring tree image information, and a Mask R-CNN algorithm which is not applied in the tree height measurement direction is adopted in a tree image processing part in combination with machine vision knowledge, so that the contour of a tree image is quickly segmented, and the invention has relatively high universality and applicability; according to the invention, the intelligent camera calibration technology is combined, the standing tree height measurement model under the camera imaging model is constructed, the convenient and non-contact type standing tree height measurement method is achieved, the method is high in universality, easy to operate and low in cost, and the actual tree height measurement value can be obtained efficiently.
Description
technical field [0001] The invention relates to the technical field of tree height measurement, in particular to a system and method for measuring the height of standing trees based on machine vision. Background technique [0002] In the current investigation of forest resources, especially the measurement of tree height, most people still use the more traditional method, that is, the method of manual reading and manual data recording, which is labor-intensive and time-consuming. [0003] With the continuous advancement of science and technology, the emergence of precision instruments such as electronic total stations, theodolites, and tree measuring guns has greatly improved the forestry resource survey work. However, the cost of precision instruments is relatively high, and some instruments require professional operating techniques, and are easily restricted by the use environment. For non-forestry professionals, it is more difficult to use these tools, which is very inco...
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Patent Timeline
Login to View More IPC IPC(8): G06T3/00G06T5/00G06T7/11G06T7/80G06T7/70G06N3/08G06N3/04
CPCG06T7/80G06T7/11G06T7/70G06N3/08G06N3/045G06T3/06G06T5/80
Inventor 华蓓黄汝维曾朝燕
Owner GUANGXI UNIV