Nondestructive testing method for quality of leechee seed

Abstract

The invention discloses a nondestructive testing method for the quality of a leechee seed; the nondestructive testing method comprises the following steps of: describing a fruit shape by using mutual proportions of transverse, lengthwise and thickness diameters of a single fruit image of a sample leechee, fitting the edge of a fruit top by using a curve, calculating the maximum curvature of the fitting curve, measuring the mass of the seed, and establishing a function among the mutual proportions of the transverse, lengthwise and thickness diameters of the single fruit, the maximum curvature,the mass of the leechee seed, and generating a comparison table of the mutual proportions of the transverse, lengthwise and thickness diameters, the maximum curvature and the seed quality grade. For the sample to be tested, the mutual proportions of the transverse, lengthwise and thickness diameters of the single fruit are calculated, the edge of the fruit top is fitted, the maximum curvature of the fitting curve is calculated, the comparison table of the mutual proportions of transverse, lengthwise and thickness diameters, the maximum curvature and the seed quality grade is retrieved, and the seed quality grade of the single fruit is judged, and therefore, the nondestructive testing of the single fruit of the leechee and the seed quality grading are realized. The nondestructive testing method is on the basis of computer vision and is low in cost and high in efficiency.

Description

technical field [0001] The invention relates to the fields of storage and processing of fruits and vegetables in agronomy and computer image processing in computer science and technology, in particular to a non-destructive detection method for the quality of litchi seeds. Background technique [0002] my country is a big country for growing lychees, which has brought great economic benefits to the country and ordinary farmers. The domestic high-end market and export market have high requirements for the internal quality of fresh lychees, which are generally sold in the form of single fruits. To set different prices, lychees need to be graded according to their quality. Among them, the size of litchi single fruit and the quality of internal seed core are important indicators to measure the quality of litchi. [0003] At present, there have been some researches and applications on the grading of litchi single fruit shape and size in China. However, the grading of the size of...

AI Technical Summary

Problems solved by technology

If nuclear magnetic resonance is used for the detection of litchi internal seed nuclei, the cost is high and the detection efficiency is low. X-rays have radiation. Visible infrared or near-infrared penetration through the thick skin of litchi requires high-intensity energy, which will destroy the quality of litchi. Ultrasonic detection needs to be filled with probes. The gaps with the lobes and the gaps between the various layers of tissue inside the fruit have brought difficulties to the non-destructive testing of litchi

Litchi is graded by fruit in actual production. Manual grading is still mainly used. Because lychees are not resistant to freshness preservation, and manual long-term naked eye recognition will cause visual fatigue and error-prone, it not only increases production costs, but also increases the intensity of labor and accuracy. not tall

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