Plucking suitability evaluation method and plucking suitability evaluation device of tea leaves, plucking suitability evaluation system as well as computer-usable medium

摘要

A vegetation index is calculated using optical data of image information of tea leaves, and the fitness-for-plucking of tea leaves is evaluated for evaluation item(s) using the calculated vegetation index based on the correlation between the vegetation index and at least one of the evaluation items including total nitrogen, the fiver level, the bud weight, the ratio of the number of opened buds to the total number of buds, and the number of buds with open leaves, to determine if the tea leaves are fit for plucking. The system of evaluating the fitness-for-plucking of tea leaves includes a photographic device (1) for creating the image information of tea leaves and an information processing section (2) for calculating the vegetation index and evaluating the fitness-for-plucking of tea leaves for the evaluation item(s) using the calculated vegetation index, and evaluates the fitness-for-plucking using a database for determining the correlation between the evaluation item(s) and the vegetation index.