The perception and sensory assessment of colour

The sight of food, that is, its total appearance generates expectations (Hutchings 

These are, in tnm, are inflnenced by the event as well as by the viewer s needs and wants at that particnlar time. Expectations comprise  

the total appearance of a particular food conununicates in a number of ways. First, it tells us about the food itself and second, through a halo effect, about the properties of other foods. 

total appearance of the food tells us about the food itself The colour, size, shape and surface texture tell us that this object is an orange. Through what we have learned about oranges, these properties also may tell us that it is ripe, mature, perhaps juicy, not rotten in the middle and is good enough to eat. Also, the appearance tells us that this orange is healthy, that it is full of those antioxidants and free radical scavengers that play vital roles within our cardiovascular system. These are positive expectations. 

A prodnct or scene possesses physical properties that can be summarised as spatial (properties of dimension), spectral (properties dependent on wavelength of light reflected or transmitted), goniophotometric (properties dependent on angles of illnmination and viewing), and temporal (properties dependent on 

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