A simple three-dimensional visualization model of camphor tree crown and its model evaluation method

Abstract

The invention provides a camphor tree crown three-dimensional visualized simple modeling and camphor tree crown three-dimensional visualized model evaluation method. The method comprises the steps that a roadside camphor tree (1) with a regularly-growing crown is selected, a marker post (5) with alternate red scales and white scales is placed in front of the camphor tree for relative positioning, a digital photo of the crown where the maker point is placed is shot with a common digital camera and imported into SketchUp software and amplified according to the scales of the marker post in the software in proportion of 1:1, and modeling is gradually conducted from one-dimensional point data to two-dimensional lines and surfaces to the three-dimensional crown through a series of tools such as a measuring tool, a straight line tool, a curved line tool, a rotating tool and an assembling tool of the SketchUp software; modeling evaluation is conducted according to measured data of the camphor tree after modeling is conducted. By means of the method, simple three-dimensional visualized modeling is conducted on the crown of the camphor tree, the level of three-dimensional simulation visualization and informationalization of the crown of the camphor tree is remarkably improved, progress of virtualization and digitalization of the crown is accelerated, the technical problems existing in visualization and measuring digitalization of the crown of the camphor tree are solved, the modeling difficulty and cost are reduced, and model parameters are evaluated.

Description

technical field [0001] The invention relates to a three-dimensional visualized simple modeling of a camphor tree crown and a model evaluation method thereof, belonging to the technical fields of visual modeling and arborometrics. Background technique [0002] Camphor tree (Cinnamomum camphora (L.) Presl.) is one of the widely distributed tree species in southern China. Its crown is broadly oval, wide-spread and densely branched and leafy. Set of multi-purpose eco-economic tree species for ecology, medicine and timber. Tree canopy is an important part of forest trees, and it is an important index for related researches such as photosynthesis, ecological benefits and species selection. The three-dimensional tree crown model has visualization, informatization, digitization and visualization, and provides a richer information for future related applications. [0003] In the past, 3D tree modeling was mostly based on complex calculations or point cloud 3D data. However, the a...

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Problems solved by technology

However, the above-mentioned methods have the following shortcomings and deficiencies: (1) It is difficult to accurately model point cloud data, and the cost is high, and the modeling speed is slow; (2) The relative operation and difficulty of complex calculation 3D coordinate modeling are also relatively large , the model is a morphological graphic image model without 3D model parameters; (3) Relatively complex calculations and large data acquisition of 3D coordinates are difficult for non-professionals to master; (4) How to quickly and easily establish a relatively regular 3D model of tree crowns to reduce the difficulty and cost, and obtain the three-dimensional visualization model and model parameters of the canopy, providing a method for carrying out related research and evaluation

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