Plant three-dimensional measurement method and system based on PTZ camera system parameters and video frames

Abstract

The invention relates to the field of digital image measurement, and proposes a plant three-dimensional measurement method and system based on PTZ camera system parameters and video frames. The method comprises the steps: S1, the calibration of PTZ camera system parameters: an axial image distance, image space and object space corresponding coefficients, an image shift rate pitching value fitting equation and coefficients; S2, a corresponding image point rectification model: an inter-frame image vector conversion model, an optical axis movement vector, a corresponding image point two-dimensional rectification matrix, and differential optimization verification; S3, point cloud world coordinate algorithm: a corresponding image point three-dimensional matrix, an inter-frame double-optical-system vector projection relation model, a PTZ camera system movement vector measurement model, three-dimensional point cloud coordinate obtaining, and a gray scale material correction factor; S4, plant local measurement method. The system comprises the following parts: S1, a PTZ camera system parameter obtaining module; S2, a corresponding image point rectification module; S3, a three-dimensional measurement module; S4, a plant local measurement module. Compared with other digital mapping technologies, the method does not need an object space control point, is strong in environmental adaptation, is high in equipment compatibility, and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of digital image measurement, in particular to a plant three-dimensional measurement method and system based on cloud mirror camera system parameters and video frames. Background technique [0002] At present, agricultural digital production management is an important content of agricultural informatization. Leaf is an important organ for plant to produce nutrients and is the basis of plant growth and fruiting; fruit is an important functional organ of plant; stem is an important nutrient conduction organ of plant. Therefore, it is of great significance to realize the digital management of agriculture by obtaining the characteristic parameters of the fruit, leaf and stem of field plants in real time and judging the growth status of plants. [0003] With the development of the Internet of Things technology, the acquisition and application of digital images has also received great attention and considerable d...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to use common CCD and CMOS sensors with low cost, strong environmental adaptability and high equipment compatibility, and without the need for object control points, to measure the technology and methods of plant fruit, leaf and stem under the natural light environment of the greenhouse. method to overcome some application deficiencies of high-precision and high-cost equipment

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