Method for realizing non-destructive test of waxing kinds of apple surfaces

A non-destructive testing and apple technology, applied in the direction of color/spectral characteristic measurement, etc., can solve problems harmful to human health, achieve the effect of reducing independent variables and simple operation
CN104406928AInactive Publication Date: 2015-03-11UNIV OF SHANGHAI FOR SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SHANGHAI FOR SCI & TECH
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for realizing non-destructive test of waxing kinds of apple surfaces. The method comprises the following steps: shooting hyperspectral images of the apple surfaces by using a visible near infrared hyperspectral imaging system, so that the image information and the spectral information of apples can be obtained at the same time, transforming spectral response under each wave length to corresponding reflectivity by using black and white plate correction, extracting the characteristic wave length for identifying the waxing types of the apple surfaces by using a continuous projection algorithm SPA, establishing a typical discriminant function by a linear discriminant analysis (LDA) method, and realizing the non-destructive test of the apples with unknown waxing types by combining matlab programming. The method disclosed by the invention has the advantages that the operation is simple, apple tissue is not required to be destructed, the test is quick and accurate, a scientific basis is provided for identifying the waxing types of the apple surfaces, and before the apples appear on the market, an on-line test is performed, so that the quality of the apples sold in the market is ensured.
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Description

technical field

[0001] The invention relates to a substance detection method, in particular to a method for non-destructive detection of waxed species on the surface of apples. Background technique

[0002] China is a big fruit producing country, and the inspection of fruit quality and safety has always been an issue that China needs to pay attention to. This is the key to improving the nutritional quality of fruits in our country. Among many nutritious fruits, apple has high nutritional value. It can not only regulate gastrointestinal function, lower cholesterol, lower blood pressure, prevent cancer, lose weight, but also enhance children's memory. However, waxing apples is now very common. Edible waxing is a legal fresh-keeping technology that is allowed by the state, but unscrupulous traders apply industrial wax on the surface of apples, which will make eating apples harmful to the human body, which will seriously affect the health of consumers.

[0003] At present, dom...

Claims

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