. Image Analysis
Davis and Perkins (1991) reported that the combination of cool white and daylight fluorescent
tubes produced the sharpest contrast between different grades of fruit and distinguished best
when the fruit was viewed against a medium green background. Fadel et al., (2001) studied
color properties of different date varieties in tamr stage. They concluded that, for human eyes,
color differences might not be the best criteria to differentiate between date varieties. Digital
equipment is used to respect images as a mathematical format. They added that blue
ingredient could be used as separation factor among investigated date varieties. Furthermore,
they suggested a sugar content estimation via color analysis. Wulfshon et al. (1989) used a
color camera to capture date fruit images to determine the relative reflectance in the range of
400-1000 nm for good and defective dates. Furthermore they used an infrared cutoff filter.
They noted that the red band image was most effective for detecting defective Majhul dates,
the green band image performed best for Zahidi dates