도정도에 따른 쌀의 칼라 모델링

Color Modeling of Milled Rice by Milling Degree

  • 발행 : 2005.04.01

초록

RPC에서 도정수율은 물론이며 쌀의 품질과 직접 관계가 있는 도정도의 측정에 활용하기 위하여 3품종(추청, 남평, 오대)의 현미를 도정도 $0\~20\%$범위에서 도정하면서 측정한 백도를 이용하여 도정도별 비선형 백도모델을 개발하였으며, 이 때 결정계수는 0.990, RMSE는 0.877로서 실측치와 예측치는 잘 일치하여 개발된 백도모델은 적용이 가능한 것으로 판단되었다. 또한, 칼라간의 상관관계를 구명하기 위하여 Lab와 RGB 쌀의 칼라시스템의 칼라인자와 백도와의 상관관계를 검토한 결과, Lab 칼라체계에서 b값 및 Hunter whiteness와 RGB 칼라체계에서 B값이 각각 결정계수 0.990, 0.985, 0.989로서 백도와 높은 상관관계를 나타내었다. b값과 B값이 쌀의 노란색과 파란색정도를 나타내고 있어 쌀의 백도는 특히 노란색과 파란색의 정도로 나타낼 수 있음을 알 수 있었다.

To investigate the relationship between the milling degree and color of milled rice, an empirical whiteness model was developed according to the milling degree from $0\%\;to\;20\%$ using paddy of three different varieties of Chuchung, Nampyong and Odae. The values of determination coefficient and the root mean square error between measured and predicted whiteness were 0.990, 0.877, respectively, and the whiteness model was proved to be quite applicable. The relationships between whiteness values and color factors in several color systems were tested to select useful color factors for development of convenient whiteness meter. The whiteness value of milled rice according to degree of milling could be converted into b and Hunter whiteness in Lab color system. B in RGB color system at high values of determination coefficient were 0.990, 0.985, and 0.989, respectively.

키워드

참고문헌

  1. Yamashita, R. (1993) New technology in grain postharvesting. Farm Machinery Industrial Research Corp., Tokyo, p.183-187
  2. Wadsworth, J.I., Sequeira, D.J., Velupillai, L. and Verma, L.R. (1991) Rice degree of milling measured by NIR. ASAE Meeting Presentation, Albuquerque, NM, USA., Paper No. 91-6030
  3. Watanabe, T. (1997) Measurement of whiteness on rice grain. J. Japanese Soc. Agric. Mach., 42, 91-96
  4. Velupillai, L. and Pandey J.P. (1989) Colour and bran removal in rice processing. ASAE Paper No. 87-6042
  5. Pandey, J.P. and Sah, P.C (1990) Modelling of bran removal and whiteness of milled rice. J. Food Technol., 27, 256-259
  6. Kawamura, S. (1990) Rice milling, and quality and taste of milled rice(part 2). Milling characteristics, Faculty of Agriculture, Hokkaido Univ., 17, 25-49
  7. The Food Agency. (1995) Rice post-harvest technology. Ministry of Agriculture, Forestry and Fisheries, Japan, p.416-425
  8. Jain, A.K. (1989) Fundamentals of digital image processing. Prentice-Hall, Inc., p.62-72