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Test and classification method

A grading method and grading technology, applied in the field of modern agricultural informatization, can solve the problems of poor grading consistency, large labor intensity, and large differences, and achieve the effects of good consistency, wide practicality and comprehensive functions.

Inactive Publication Date: 2012-11-14
CHINA AGRI UNIV
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Problems solved by technology

At present, the potato grading in my country is mainly done manually, which requires a lot of labor force and high labor intensity, and the results of grading vary greatly due to individual differences of workers, and the consistency of grading is poor and the efficiency is low.

Method used

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Embodiment Construction

[0026] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] The invention provides a method for detecting and grading spherical or ellipsoidal fruits and vegetables. First, the image of the surface of the fruit and vegetable is collected, and the contour line of the fruit and vegetable in the image is extracted; secondly, the average gray value of the G channel on the surface of the fruit and vegetable is calculated and The G channel gray value of a certain point, and the difference between the gray value of the certain point and the average gray value, and comparing the difference with the gray value difference threshold to detect the germination on the surface of the fruit and vegetable Or not; then, calculate the maximum point distance between points on the contour line, and compare the maximum point distance obtained with the size classification threshold to obtain the size grade of t...

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Abstract

The invention relates to a graduation and test method for fruits and vegetables. The graduation and test method comprises collecting images of the fruits and vegetables, extracting outlines of the fruits and vegetables in the images, determining surface germination grades of the fruits and vegetables by calculating the mean grey value of the surfaces of fruits and vegetables and grey value of a point, determining size graduations of the fruits and vegetables by calculating the maximum distance between points on the outlines, determining shape graduations of the fruits and vegetables by calculating the shape factor as well as determining the malformation of the fruits and vegetables by calculating the absolute value of the difference between normalized radiuses of adjacent sampling boundary points on the outlines. The graduation and test method is highly objective, stable and standard, has good consistence, requires no contact, causes no harm and has very good application prospect.

Description

technical field [0001] The invention relates to a modern agricultural information technology, in particular to a method for detecting and grading according to the appearance characteristics of fruits and vegetables. Background technique [0002] China's potato planting area and total output rank first in the world, and China is the tenth largest potato exporter in the world. In order to make potatoes enter the domestic and foreign circulation field as a high-quality, high-value-added agricultural product, it is necessary to attach great importance to post-harvest potato processing technology, reduce post-harvest losses, increase added value, and at the same time put the automation and refinement of post-harvest processing technology First, this is an important way to improve the grade and value of agricultural products. [0003] The external quality of potatoes mainly includes defect characteristics such as size, shape, germination and deformity. Weight and size can reflec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/00B07C5/04B07C5/342
Inventor 谭豫之李伟郑冠楠
Owner CHINA AGRI UNIV
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