Tea quality nondestructive detecting method and device based on near-infrared spectrum and machine vision technology

Abstract

The invention relates to a nondestructive detection method for tea quality based on a near infrared spectrum and a machine vision technology and a device thereof. The detection method comprises the following steps: spectrum and image acquisition to tea are synchronously performed, obtained initial data are subjected to preprocessing, feature extraction and fusion, and then an expert evaluation result is combined to establish a quality grade evaluation model of the tea to quickly and nondestructively detect the comprehensive internal and external quality of the tea. The detection device comprise a spectrum acquisition device, an image acquisition device and a computer, wherein the spectrum acquisition device and the image acquisition device finish the signal acquisition of a tea sample and then transfer a signal to the computer; and the computer finishes the extraction and fusion of feature information, and then substitutes in the pre-established model to judge a final result of the quality of the tea. The method applies a fused nondestructive detection means based on the two technologies to the detection process of the comprehensive quality of the tea, has the advantages of high detection accuracy, good result consistency, strong automation degree and so on, and creates conditions for standardized classification of the quality of the tea.

Description

technical field [0001] The invention relates to a non-destructive detection method for tea quality, in particular to a non-destructive detection method and device for tea quality based on near-infrared spectrum and machine vision technology. Background technique [0002] For a long time, tea quality testing mainly has two methods: sensory evaluation and physical and chemical analysis. Sensory evaluation is to identify the authenticity of famous and high-quality teas by judging the appearance, aroma and taste of tea leaves by well-trained professional reviewers one by one. However, the sensitivity of human sensory organs is affected by experience, gender, mental state, and physical condition. Even the interference of external factors such as the geographical environment will change, thus affecting the accuracy of the test results. The physical and chemical analysis method is to use chemical analysis to analyze the content of active ingredients such as tea polyphenols, caffei...

AI Technical Summary

Problems solved by technology

In terms of non-destructive testing of tea quality, a single detection method generally cannot fully describe the quality of tea. For example, near-infrared spectroscopy can characterize the internal quality of tea well, but it is often powerless to describe the external quality characteristics of tea; machine vision technology It can well express the external quality characteristics of tea, but cannot obtain the characteristic information reflecting the internal physical and chemical indicators of tea. The limitations brought about by the different emphases of information reflection will inevitably affect the objectivity and stability of the results.

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