Fruit tree crown volume measurement method based on unmanned aerial vehicle detection technology

Abstract

The invention belongs to the technical field of fruit tree plantation, and particularly provides a fruit tree crown volume measurement method based on an unmanned aerial vehicle detection technology. The method comprises the following steps that step 1: the shielding volume compensation coefficient of a fruit tree crown is acquired; step 2: the unmanned aerial vehicle is moved to the upper position exactly facing the center of the tree; step 3: the vertical distance between each ultrasonic distance measurement sensor and the ground or the crown and the top view image of the fruit tree crown are acquired; step 4: the corresponding sensors meeting the condition of |hi-h-i|=0 are marked; step 5: the top view image of the fruit tree crown acquired by a CCD camera (1) is segmented, filtering, image segmentation, binarization and morphological processing are performed on the acquired image by using Matlab 2015a, and the largest cross section of the crown is segmented and the actual area and length corresponding to the single pixel point in the image are obtained; step 6: a rectangular plane coordinate system is established; step 7: a tree contour fitting curve is constructed; and step 8: the fruit tree crown volume is obtained.

Description

technical field [0001] The invention belongs to the technical field of fruit tree planting, in particular to a method for measuring the crown volume of fruit trees based on unmanned aerial vehicle detection technology. Background technique [0002] The size of the canopy volume of fruit trees is an important basis for determining the amount of spraying. Variable spraying according to the difference in the canopy of fruit trees can save pesticides and protect the environment. Therefore, the measurement of canopy volume of fruit trees plays a very important role in precision agriculture in orchards. [0003] The traditional manual measurement method uses surveying and mapping tools such as tape measure and altimeter to obtain crown diameter, tree height and other crown dimensions, and calculates the crown volume of trees based on geometric formulas. The cost of this method is low and the principle is simple, but the accuracy is easily affected by the subjectivity of the measur...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a real-time measurement method of fruit tree crown volume based on unmanned aerial vehicle detection technology in view of the problems of poor real-time performance and limited application of the fruit tree crown volume measurement method in the existing variable spray technology

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