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A Calculation Method of Three-Dimensional Plant Plant Projection Area

A projection area and calculation method technology, applied in the field of agricultural information, can solve problems such as long calculation time, inaccurate calculation results, and large amount of cycle calculation, so as to improve calculation accuracy, improve accuracy, and reduce grid overlap and elimination calculation work volume effect

Active Publication Date: 2021-06-22
SHANGHAI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still two shortcomings in the above calculation method. One is that the phenomenon of light leakage is ignored, which makes the calculation results inaccurate; the other is that the calculation amount is large and the calculation time is long

Method used

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  • A Calculation Method of Three-Dimensional Plant Plant Projection Area
  • A Calculation Method of Three-Dimensional Plant Plant Projection Area
  • A Calculation Method of Three-Dimensional Plant Plant Projection Area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Example 1 Calculate the projected area of ​​a 3D model of a cucumber and visualize the results

[0039] Including the following steps:

[0040] S1. Three-dimensional grid preprocessing, reasonable subdivision of plant leaves:

[0041] S11: Find the minimum leaf length in 3D: cyclically compare each leaf on the 3D plant, find the leaf with the smallest leaf length, and record the minimum leaf length as LeafLength min ;

[0042] S12: Calculate the maximum grid edge length EdgeLength max : Let EdgeLength max =LeafLengthmin / 5.0;

[0043] S13: Mesh subdivision: check each grid element of the 3D plant, if a certain grid element has an edge length greater than EdgeLength max , the grid edge is subdivided, that is, the grid surface element is divided into two grids with smaller side lengths; the same process is performed on the subdivided grid surface element, and finally the grid of the entire 3D plant is In, there is no edge length greater than EdgeLength max Case;

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Abstract

The invention provides a method for calculating the projection area of ​​a three-dimensional plant, which comprises the following steps: (1) preprocessing the three-dimensional grid, subdividing the plant leaves; (2) generating a projection grid, using the center of gravity as the projection overlap The judgment basis is to accurately eliminate overlapping grids; (3) Calculate the projected area. The method for calculating the projected area of ​​three-dimensional plants of the present invention significantly improves the accuracy of calculating the projected area while reducing the computational workload of grid overlap and elimination.

Description

technical field [0001] The invention relates to the technical field of agricultural information, in particular to a method for calculating the projected area of ​​a three-dimensional plant. Background technique [0002] In applications such as agricultural breeding, cultivation, and garden design, it is often necessary to calculate the projected area of ​​a plant. The projected area is an important parameter reflecting the leaf opening angle and the light-receiving area, and it is also a morphological parameter directly related to the yield. Accurately calculating the projected area of ​​plants has important guiding significance in the fields of agricultural production management and landscaping. Due to the various shapes of leaves and stems of plants, the projection on the ground is usually extremely irregular, and affected by the tilt angle of the organs, the calculation accuracy of the projected area is not high, and the calculation speed is slow. This makes accurate an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/62G06T19/20
CPCG06T19/20G06T2207/10012G06T2207/30188G06T7/62
Inventor 钱婷婷陆声链冯静岩
Owner SHANGHAI ACAD OF AGRI SCI
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