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Unique Hues of Large Stimuli: The “Colour Size Effect”

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From architectural practice it is known that the perceived colour of large painted facades viewed outdoors at a distance from the house differs from the perceived colour of a small colour card placed directly onto it to perceptually match its colour. Authors believe that the explanation may be – at least partially – the so-called “colour size effect”. To study this, laboratory experiments have been carried out with controlled viewing conditions. Significant shifts of three (red, yellow and green) of the four unique hues were found on uniform self-luminant stimuli of a colour CRT monitor when the stimulus size changed from 10° to 120°. The mean overall hue difference was ΔH* = 2. The extent of the colour size effect varied among the 7 observers. Hue differences of the painted facades had a similar order of magnitude as the hue differences in the present study.
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Document Type: Research Article

Publication date: January 1, 2002

More about this publication?
  • Started in 2002 and merged with the Color and Imaging Conference (CIC) in 2014, CGIV covered a wide range of topics related to colour and visual information, including color science, computational color, color in computer graphics, color reproduction, volor vision/psychophysics, color image quality, color image processing, and multispectral color science. Drawing papers from researchers, scientists, and engineers worldwide, DGIV offered attendees a unique experience to share with colleagues in industry and academic, and on national and international standards committees. Held every year in Europe, DGIV papers were more academic in their focus and had high student participation rates.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual papers for details.

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