Texture dominates saliency in suprathreshold combinations of texture, colour and luminance.
نویسندگان
چکیده
منابع مشابه
Texture Variations Suppress Suprathreshold Brightness and Colour Variations
Discriminating material changes from illumination changes is a key function of early vision. Luminance cues are ambiguous in this regard, but can be disambiguated by co-incident changes in colour and texture. Thus, colour and texture are likely to be given greater prominence than luminance for object segmentation, and better segmentation should in turn produce stronger grouping. We sought to me...
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Do texture-sensitive mechanisms operate separately on, or pool, luminance and colour contrast information? We addressed this question by measuring threshold-versus-amplitude functions for orientation-modulated (OM) gratings comprised of gabor elements defined by either colour or luminance contrast. In both the uncrossed (all elements in test and mask defined by either colour or luminance contra...
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Previous psychophysical experiments have demonstrated that various factors can exert a considerable influence on the apparent velocity of visual stimuli. Here, we investigated the effects of superimposing static luminance texture on the apparent speed of a drifting grating. In Experiment 1, we demonstrate that superimposing static luminance texture on a drifting luminance modulated grating can ...
متن کاملColour-texture Indexing
It is often assumed that colours in an image correlate with intrinsic surface properties (e.g. reeectance). Indeed, this goes a long way to explain the predominance of colour as feature for image indexing. Unfortunately the assumption is unfounded since the image of a scene viewed under two diierent coloured lights contains two diierent sets of colours; that is, image colour is a measure of the...
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The quaternion representation of colour is shown to be effective in the context of colour texture region segmentation in digital colour images. The advantage of using quaternion arithmetic is that a colour can be represented and analyzed as a single entity. A basis for the colour textures occurring in a given image is derived via quaternion principal component analysis of a training set of colo...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2012
ISSN: 1534-7362
DOI: 10.1167/12.9.1290