Three dimensional tree fine modeling method based on integrated drive of data and rules

Abstract

The invention relates to a three dimensional tree fine modeling method based on integrated drive of data and rules. The three dimensional tree fine modeling method includes the steps: acquiring geometrical parameters and topological parameters of the morphological structure of a tree limb system, based on L-system grammar rules, extracting the constraint rule of the limb system, and utilizing a turtle interpretation algorithm to establish a three dimensional geometrical model; utilizing a hand-held laser scanner to obtain the point cloud data of the blades and fruit on annual and biennial branches, based on the point cloud data, and generating a fine three dimensional model for the local part of a canopy; and finally according to the geometrical link relationship between the local part and the whole tree in space, utilizing the method for rule modeling to integrate the three dimensional model of the local canopy part with the limb system to form a three dimensional model of the whole tree. By means of the three dimensional tree fine modeling method, a fine and reliable three dimensional model which is highly similar with the practical morphological structure can be formed; a basis for evaluation analysis of small and medium plant types of tree physiological ecological simulation result is provided; and the simulation result for a virtual plant has verifiability.

Description

technical field [0001] The invention relates to the fields of agricultural informatization and modern agricultural technology, in particular to a three-dimensional tree fine modeling method driven by comprehensive data and rules. Background technique [0002] Virtual plants refer to the simulation of the growth and development of plants in three-dimensional space by using computer, combined with visualization and other technologies. Different application fields have different specific requirements for virtual plants. For example, in the fields of film and television, games, etc., the plant models are required to be vivid, realistic, and visually have a strong sense of reality; in the field of agriculture and forestry, the models are required to be as close as possible to the actual plant form. The structure, that is, the model accuracy must be high and credible. Using virtual plants to simulate the process of plant growth and development can help humans better understand an...

AI Technical Summary

Problems solved by technology

On a single organ of a plant, it is often possible to reconstruct a model that is very similar to the actual plant. However, for complex individual plants, the occlusion phenomenon is serious. It is necessary to reconstruct the whole plant that is more consistent with the actual plant from the scanned point cloud data. The model does not yet have a mature algorithm, which is challenging

The above four methods have their own advantages, disadvantages and limitations in the construction of 3D plant models. The models formed by the first three methods can meet the requirements visually, but it is difficult to meet the requirements of quantitative evaluation between virtual plant models and actual models.

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