Abstract
Color is a factor of primary importance in the market value of raw tomatoes.
J. N. Yeatman, A. P. Sidwell, and K. N. Norris [
Food Technol. 14,
16 (
1960)] have developed an equation for color quality of raw tomatoes using purées of fresh fruit as specimens. The U. S. Department of Agriculture asked Hunter Associates Laboratory to design a photoelectric tristimulus instrument to measure this quality index directly. This has been done by modifying the Ohm’s law analog scales of the Hunter color difference meter [see
R. S. Hunter,
J. Opt. Soc. Am. 48,
985 (
1958)] to solve the tomato-color equation in four steps.
© 1961 Optical Society of America
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