The color of farm product and food is the very important quality target of product. While the vegetable color is more important, because the vivid vegetable color can not only stimulate the consumers’ desire of buying, but also accumulate the people’s food desire. It’s more important that color is an important target that whether the vegetable is fresh.
The color of objects is a psychology physical quantity. It has relation with the object itself and human color vision. The appraising and comparin...