The colors of tea and its soup are very important factors in assessing the quality of tea. This research tried to reveal the relationship between the color and the store time of tea used to determine the tea quality. The HIS color system was selected and was improved to simulate the process of tea color change. The samples of tea, which was stored under the same condition but different stored times, were taken to detect their colors of tea and soup. The results indicate that the correlation of the color det...
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