Application of Color Index for Red Grapes (CIRG) for Assessment of Grape Quality

Jae-Youn Choi; Eun-Kyung Cho; Seo-Jun Park; Youn-Young Hur; Jong-Chul Nam; Sang-Wook Koh; Sung-Min Jung

doi:10.12791/KSBEC.2014.23.3.244

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2014 Vol.23, Issue 3 Preview Page Next Page

Application of Color Index for Red Grapes (CIRG) for Assessment of Grape Quality 포도의 품질 평가를 위한 CIRG 값의 적용

30 July 2014. pp. 244-249

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Abstract

Hunter value (L*, a*, b*) is a rapid and convenience method for compare with different skin color, but not suitable to compare quality with various grape cultivars. Color Index for Red Grapes (CIRG) is one of a simply convert method for grape skin color as numeric data, and many previously result showed that high correlation between CIRG index and various quality factors of grape. In this experiment, we measured CIRG index, total soluble solids (TSS), titratable acidity (TA), and total anthocyanin content on the grapes (Campbell Early, Heukbosuk, Kyoho) from the varaison to harvest. As a result, CIRG index and anthocyanin contents have an exponential correlation; r-square is each 0.8595 in the ‘Campbell Early’ and 0.8500 in ‘Heukbosuk’. And TSS and CIRG index have a positive r-square, at the Campbell Early is 0.7758 and Heukbosuk is 0.7253. Also TA and CIRG index have a positive r-square, at the Campbell Early is 0.7279 and Heukbosuk is 0.6630. These results were shown that CIRG index is a reliable indicator for a none-destructive evaluation of the grape quality.

Keywords

color space

colorimeter

regression analysis

과피색의 경우 정량적인 지표로서 주로 Hunter L*a*b* 값을 이용하나 이 값으로 과피색, 과실의 품질을 간접적 으로 확인하기에는 어려운 점이 있다. 따라서 본 실험에 서는 포도 착색지수로서 제안된 CIRG(Color Index for Red Grapes) 값의 활용도를 평가하여 포도 착색의 객관 적인 평가지수로서의 가능성을 검증하고자 하였다. 이를 위해 포도가 착색이 시작되는 시기부터 과립을 채취하여 과피색과 당도, 산도 등의 품질 인자를 측정하여, CIRG 값과의 상관을 분석하고 회귀식을 도출하였다. CIRG 값 과 안토시아닌 함량은 CIRG 값이 증가함에 따라 안토 시아닌 함량은 지수적으로 증가함을 알 수 있었으며, 결 정계수는 ‘캠벌얼리’와 ‘흑보석’ 모두 0.8500 였다. CIRG 값과 당도는 ‘캠벌얼리’가 0.7758, ‘흑보석’이 0.7253으로 높은 결정계수를 나타냈으며, 산도 또한 각각 0.7279, 0.663으로 비교적 높은 결정계수 값을 나타내었 다. 따라서 적색포도를 대상으로는 CIRG값이 Hunter L*a*b*값에 비해 과실품질을 추정하는데 있어 보다 높은 신뢰성을 가지고 있는 것을 확인하였다.

키워드

색공간

색차계

회귀분석

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Protected Horticulture and Plant Factory
Journal Title(Ko) :시설원예ㆍ식물공장
Volume : 23
No :3
Pages :244-249
Received Date : 2014-08-12
Revised Date : 2014-08-21
Accepted Date : 2014-09-11
DOI :https://doi.org/10.12791/KSBEC.2014.23.3.244

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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