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Influence of local scene colour on target detection tested by global rearrangement of natural scenes

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Local scene colour can influence the visual detectability of an object or target, but so can the familiarity, meaning, and global organisation of the scene. The aim of this study was to test whether the effects of local scene colour on target detectability are secondary to global effects. A target-detection task was undertaken by human observers with coloured images of natural scenes that were cut into quarters, randomly rearranged, and then reassembled. The target was a small, shaded, neutral grey sphere located randomly within the scene and matched in mean luminance to its local surround. It was found that observers' target-detection performance with the rearranged images was about as good as with the original images. The combination of local colour properties, namely, lightness and the red-green and yellow-blue components of chroma, accounted, respectively, for 55% and 50% of observers' detection performance with the original and rearranged images. Despite the disruption of global organisation, local scene colour continued to influence target detection.
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Document Type: Research Article

Publication date: January 1, 2012

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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