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Image-based plant three-dimensional shape measurement and reconstruction method and system

A three-dimensional form and image technology, applied in the direction of measuring device, image data processing, 3D modeling, etc., can solve the problems of inaccuracy, plant damage, inconvenience, etc., and achieve the effect of broad application prospects.

Inactive Publication Date: 2010-02-03
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the traditional agricultural field, the means of obtaining crop morphology data are single, inaccurate, inconvenient, and usually cause different degrees of damage to the plant body, so it has great limitations

Method used

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  • Image-based plant three-dimensional shape measurement and reconstruction method and system
  • Image-based plant three-dimensional shape measurement and reconstruction method and system
  • Image-based plant three-dimensional shape measurement and reconstruction method and system

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Embodiment 1

[0092] In this embodiment, an image-based three-dimensional shape measurement and reconstruction method for plants proposed with cucumber as the research object is applicable to the measurement and reconstruction of three-dimensional shape of plants like cucumbers mainly composed of leaves. Specific steps are as follows:

[0093] S1. Image acquisition, such as Figure 5 As shown, the principle diagram of image acquisition is given. When shooting, first fix the camera as the shooting source on a tripod, then take an image, and then let the camera move vertically, descend or rise for a certain distance b, Take another image.

[0094] S2. Camera calibration, Figure 6 The camera calibration board formulated in this embodiment is given, the images of the calibration board are taken in different orientations, and the corner points of the grid are obtained through the corner point extraction algorithm. Then according to the geometric size of the calibration plate and the coordina...

Embodiment 2

[0116] In this embodiment, corn is taken as the research object, and an image-based three-dimensional shape measurement and reconstruction method for plants is proposed, which is applicable to the measurement and reconstruction of the three-dimensional shape of corn-like plants mainly composed of stems and stalks.

[0117] The difference from Example 1 is:

[0118] S3. Feature point extraction, the process of extracting the two-dimensional skeleton information of corn firstly divides and binarizes the corn image, and realizes the skeleton feature extraction through the improved Hilditch algorithm, first marks the binary image, and the part that needs to be refined 1 for the marker and 0 for the background. As shown in Table 1, the method of the present invention also considers the situation around each of the 8 points while considering the 8 adjacent points around each point, and according to the correlation between the point and the point to the Hilditch algorithm Restrictio...

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Abstract

The invention relates to an image-based plant three-dimensional shape measurement and reconstruction method and a system, and the method comprises the steps of obtaining two images of a target objectin different positions in the vertical direction, obtaining internal parameters of a shooting source, extracting two-dimensional profile information or two-dimensional framework information of the target object from the images, carrying out feature matching on a profile or a framework through the epipolar constraint algorithm, calculating data of a three-dimensional shape structure of the target object according to the internal parameters and the result of the feature matching, and finally obtaining a three-dimensional model of the target object by using spline curves and curved surfaces for fitting and generating the three-dimensional model of the profile or the framework. The method and the system design the corresponding data acquisition method according to the rapid, accurate and non-destructive data acquisition demands of main crops of agriculture by facing to three-dimensional shape acquisition and reconstruction of the main crops, as well as measurement and calculation of main agronomic parameters based thereon, thereby having an important practical significance and broad application prospects for developing practical tools.

Description

technical field [0001] The present invention relates to the technical field of image-based three-dimensional modeling, in particular to an image-based method and system for three-dimensional shape measurement and reconstruction of plants. Background technique [0002] Agriculture is the foundation of China's national economy. Agricultural informatization is an important symbol of agricultural development in this century and an important part of agricultural modernization. In the process of implementing agricultural informatization, agriculture can obtain multiplied benefits through informatization. The information industry can form an agricultural information industry through information software and hardware services for agriculture, and finally form a win-win situation for agriculture and information industry. Modern agriculture is inseparable from information services in all aspects of agricultural production and circulation. Agricultural information has already involve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G01B11/24
Inventor 赵春江郭新宇肖伯祥陆声链温维亮
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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