Measuring colour constancy and colour appearance: An experiment
Rizzi, A., Parraman, C. and McCann, J. (2009) Measuring colour constancy and colour appearance: An experiment. In: MINET (Measuring the Impossible Network) Conference: Measurement, sensation and cognition, National Physical Laboratory, London, 10-12 November 2009.
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Paper given at Perception and Sensation Session 3. Colour sensation does not depend strictly of the light signal conveying colour information, but also depends on the arrangement of the visual array of all signals coming from the scene. Colour constancy is one aspect that contributes to the Human Vision System (HVS) in the formation of colour appearance. In the digital-imaging field the concept of colour consistency is often related with a process of trying to identify the object's reflectance and illumination. One could separate the reflectance component from the illuminant component, by discounting the illuminant. Although this is claimed to be a useful operation for several applications in computer vision, it is not an accurate description of our human colour appearance mechanisim.