The image analysis system (Nimesh et al., 1993)
was developed to evaluate the colour of the stone fruit. The realtimematurity
grading of fresh peach was developed to measure the
13 ground colour references used by the California Tree Fruit Agreement (CTFA). The RGB model (Choi et al., 1995) was transformed
into the HIS model, the cumulating H distributing map of fresh
tomato was divided into six maturity grades, and tomato maturity
index was constructed.