Making of color chart for grape 'Shine Muscat' for quality evaluation

摘要

We aimed at making the color chart of new yellowish green grape cultivar "Shine Muscat" by using original color that was a useful and quantitative evaluation index of the appearance. The relationship between the ingredient changes and the color development of grape berries of "Shine Muscat" was also clarified. Accurate color information was obtained from the acquired berry image since the reflected glare of the optical diffusion body was suppressed on the surface of the fruit berry. Moreover, it was confirmed that color chart is a very useful tool to evaluate the introspectiveness quality of grape berry. The adoption of HSV color space that covers the human perceived color approximately and the color matching between monitor and printer enabled us to make the color chart with convenience and utility.