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  Bicovi > Whiter Demos > Advanced Investigation


Advanced Investigation into the "Whiter than White" Effect

Review the Viewing Method if required.

Brightening Illusion:- the central area can appear to be brighter even though it is the same as the surrounding colour.  No colour fusion is required.  This is a possible explanation of the Whiter effect but the demonstrations that follow show this to not be true. 

Whiter Colour Pairings with a Centre/Surround Reversal:- the brightening still occurs.  Only representative examples are shown.

Whiter Complementary Pairs:-  a perceptual grey was determined for each colour and then the average was chosen as the reference grey for each pairing.

Brightening Illusion

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Centre/Surround Reversal

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Orange Reversal
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Green Reversal
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Blue Reversal
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Violet Reversal

"Whiter" Complementary Pairs

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1) Red-Green as shown.
2) Image in reversal form.
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1) Blue-Orange as shown.
2) Image in reversal form.
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1) Violet-Yellow as shown.
2) Image in reversal form.

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