Colour and Colour Rendering - The standard colorimetric system

4 important questions on Colour and Colour Rendering - The standard colorimetric system

Colour matching funtions

Functions that match our cones x, y, and z; y is identical to V[lambda]

The factor k in the formulas for the tristimulus values is a ...?

scaling factor which is only relevant for non-luminous colours

What do we see if the colour stimulus functions are different but the tristimulus values are the same? And what are these colours called

The standard observer would not see a difference. They are called metametric
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What do chromaticity co-ordinates x, y, z represent?

the ratio of each tristimulus value to their sum

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