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OPTIMIZING COLOURS FOR EFFECTIVE VISUALIZATION OF GEOGRAPHIC DATA

Jitka Doležalová

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COLOUR DISTANCE

• Colour model, colour space• Metric – quantification of the difference

between two colours• Perceptually uniform versus non-uniform

colour model

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sRGB

CIELAB

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EXPERIMENTAL RESULTS

• Two successive phases through a questionnaire and eye-tracking

• What colour distance is optimal? • The distance was measured by CIEDE2000

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COLOUR SCHEMES

• Uniform colour distances between classes

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COLOUR SCHEMES

• Non uniform colour distances between classes

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CONSTRUCTION OF COLOUR SCHEMES

• Intersection of two subspaces• CIE94

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CONSTRUCTION OF COLOUR SCHEMES

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SOFTWARE TOOL• http://ostrubl.shopino.cz/free/barvicky.php

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