Stereophotogrammetric survey-based method for obtaining morphological parameters of maize plant

Abstract

The present invention relates to a stereophotogrammetric survey-based method for obtaining the morphological parameters of a maize plant. The method comprises the steps of (1) forming a rectangular marking ruler by adopting 4-bit typical gray codes, with 1cm as the width of a code element, 1cm as the spacing between adjacent code elements and 2cm as the width of a reference code; (2) in the maize growing season, standing the rectangular marking ruler upright besides a to-be-measured maize plant, photographing by a binocular camera, and obtaining the three-dimensional counterpart of the maize plant with the above rectangular marking ruler as a reference; (3) according to the three-dimensional counterpart, calculating the morphological parameters of the maize plant through referring to the reading data of the rectangular marking ruler. According to the technical scheme of the invention, the maize plant is stereoscopically photographed by the conventional binocular camera, so that the morphological parameters of the maize plant can be obtained. Therefore, the field data acquisition speed and the indoor data processing speed are comprehensively improved. Meanwhile, the measuring and calculating precision and the measuring and calculating efficiency for the form factors of the maize plant are effectively improved.

Description

technical field [0001] The invention relates to the field of planting and monitoring of corn, in particular to a method for obtaining morphological parameters of corn plants based on stereophotogrammetry. Background technique [0002] The morphological structure of crops determines the competitiveness and resource acquisition intensity of crops to a large extent, and the growth and elongation of stems are the direct reflection of crops' competition ability for light. Corn stalks can store and transport water and fertilizer. Plant height largely determines the light interception ability and light energy utilization efficiency of maize population canopy. Parameters such as inclination angle and azimuth angle of maize leaves are important factors affecting plant photosynthesis. Therefore, studying the morphological structure of maize plants is of great significance for rational selection of suitable planting density, reduction of lodging rate and high yield of maize. [0003]...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of long parameter acquisition period, low efficiency, and poor precision in the prior art, and provides a method for obtaining morphological parameters of corn plants based on stereophotogrammetry. The binocular camera is an image acquisition tool, which can take stereoscopic photography of corn plants, improve efficiency and accuracy, and realize accurate measurement of corn trunk diameter, leaf inclination angle, leaf azimuth and other parameters

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