Asymmetry as a Measure of Visual Saliency

A salient feature is a part of the scene that stands out relative to neighboring items. By that we mean that a human observer would experience a salient feature as being more prominent. It is, however, important to quantify saliency in terms of a mathematical quantity that lends itself to measurements. Different metrics have been shown to correlate with human fixations data. These include contrast, brightness and orienting gradients calculated at different image scales.

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