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RGB colour gradient following colour constancy preservation

RGB colour gradient following colour constancy preservation

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© The Institution of Engineering and Technology
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A colour gradient operator defined following colour constancy preservation properties is presented. The approach does not need a priori information or changes of colour space. It is based on the angular distance between pixel colour representations in the RGB space. It is naturally invariant to intensity magnitude, implying high robustness against bright spots produced by specular reflections and dark regions of low intensity.

Inspec keywords: image representation; image colour analysis

Other keywords: a priori information; pixel colour representations; colour constancy preservation; RGB colour gradient

Subjects: Computer vision and image processing techniques; Optical, image and video signal processing

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