Fruit tree crown layer leaf and fruit three-dimensional reconstruction method and system

Abstract

The invention provides a fruit tree crown layer leaf and fruit three-dimensional reconstruction method and system. The method includes the steps of extracting a three-dimensional branch framework of a fruit tree crown layer, judging whether each branch in the branch framework is connected with a sub-branch or not, enabling leaf cluster branches and fruit branches to grow on the branches connected with the sub-branches, constructing a leaf three-dimensional model and a fruit three-dimensional model, enabling leaves to grow on the branches in the three-dimensional branch framework according to the leaf three-dimensional model, and enabling fruits to be borne on the fruit branches according to the fruit three-dimensional model. The method is combined with a fruit tree branch framework extraction method of three-dimensional point cloud, and therefore rapid three-dimensional model reconstruction of the shape structure of a fruit tree crown layer with leaves and fruits is achieved; the number, the size and the direction of the leaves in the reconstructed crown layer model better conform to the shape characteristics of real fruit trees and meanwhile the model has high universality, and therefore the high-precision foundation model support is provided for application such as structure analysis of the fruit tree crown layer and the evaluation of physiological and ecological characteristics of the fruit tree crown layer.

Description

technical field [0001] The invention relates to the technical field of three-dimensional graphics processing, in particular to a method and system for three-dimensional reconstruction of fruit tree canopy leaves and fruits. Background technique [0002] The 3D reconstruction of the fruit tree canopy is a hot issue in the fields of agronomic research and graphic simulation. Accurate and fast 3D canopy reconstruction is of great significance for the analysis of the shape and structure of the fruit tree canopy and the calculation of physiological functions. As the two most important organs of fruit trees, leaves and fruits have a very important impact on the shape of the fruit tree, the shape characteristics of the canopy, and the calculation of physiological functions. Key technical issues of 3D reconstruction. [0003] The most direct and accurate method is to use a 3D digitizer to collect data on the fruit tree canopy, obtain detailed information on the position, direction ...

AI Technical Summary

Problems solved by technology

However, due to the luxuriant branches and leaves of the tree canopy and serious mutual occlusion, most of the leaves and fruits in the canopy are occluded during 3D scanning and cannot be completely obtained. Therefore, the plant model reconstructed by this method is only visually similar, and the accuracy is not high; at the same time This method reuses the same flat leaf model for the entire canopy during reconstruction, resulting in a single spatial attitude of leaves in the reconstructed tree 3D model, which seriously affects the calculation of leaf area and light interception ability, and is also similar to "on the same tree" in nature. No two leaves are exactly alike" diversity mismatch

[0005] Another method is to use certain rules or knowledge of the spatial distribution of tree canopy branches and leaves to carry out canopy 3D reconstruction, which is generally called a rule-based reconstruction method. For the existing rule-based tree canopy 3D reconstruction methods, these methods are There is a common disadvantage: the added leaves have the same size and shape, or only change the size and direction through a simple random method, which lacks physiological science and is difficult to reflect the variety of leaves in the natural plant canopy in shape and color It will also cause large errors in the calculation results of leaf area and light interception ability in the final reconstructed canopy model

[0006] In general, although there are some methods for 3D reconstruction of fruit tree canopy structure, due to the unique complexity of fruit tree morphological structure, these methods still have deficiencies in realizing fast and accurate 3D reconstruction of fruit tree morphological structure.

In addition, the existing three-dimensional tree canopy reconstruction methods only consider the addition or generation of leaf organs, but do not consider the fruit organs.

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