Method for quickly non-destructive measurement for nitrogen content of tea using multiple spectrum imaging technology

Abstract

The invention discloses a method for quickly non-damage measuring the nitrogen content of tea tree, via multi-spectrum image technique, comprising that first using a 3CCD multi-spectrum image device to collect the multi-spectrum image information of correct sample, while the nitrogen content of sample (tea tree) is measured by international standard method. The obtained image is processed by silent algorism to improve image quality, and by background separation to obtain the image of object, then obtains the reflective index (character parameter) of object based on a standard reflective plate and a nominal reflective curvature. The invention uses multi-element correct algorism to build the quantitative relationship between the character parameter of tea-tree multi-spectrum image and tea-tree nitrogen content, to build a correct model, and then inputs the character parameter of multi-spectrum image of the sample into the correct model, to be tested and obtain the nitrogen content of the tea tree. The 3CCD multi-spectrum image device via a RS-232 interface is connected with an image receiving plate mounted on a computer. The invention can measure nitrogen content of tea tree quickly, accurately, non-damage and online.

Description

Technical field [0001] The invention relates to a method for analyzing materials by optical means, in particular to a method for quickly and non-destructively measuring the nitrogen content of tea plants with a multispectral imaging technology. Background technique [0002] Nitrogen nutrition diagnosis is the core of tea tree nutrition diagnosis. Nitrogen fertilizer is the largest type of chemical fertilizer in the world, and it is also the most difficult fertilizer to accurately quantify in recommended fertilization. The main reason is the lack of test methods that can accurately, quickly and economically determine the nitrogen nutrition status of crops and determine the required amount of nitrogen fertilizer. For a long time, the diagnosis of crop nitrogen nutrition and the recommended fertilization of nitrogen fertilizer are based on routine laboratory tests. At present, the Kjeldahl method is generally used to determine the nitrogen content in plants, but the measurement is v...

AI Technical Summary

Problems solved by technology

At present, the Kjeldahl method is generally used to determine the nitrogen content in plants, but the measurement is very time-consuming and complicated, and requires the leaves to be separated and pretreated, and cannot be directly measured online during the growth of rapeseed

However, other traditional testing methods also need to consume a lot of manpower and material resources in terms of sampling, measurement, and data analysis, have poor timeliness, and are usually destructive testing, which is not conducive to popularization and application.

Images