Contrast enhancement has an important role in image processing applications. Conventional contrast enhancement techniques often fail to produce satisfactory results for broad variety of low contrast images or cannot be automatically applied to different images, because their parameters must be specified manually to produce a satisfactory result for a given image. A Power Constrained Contrast En...

We introduce saliency-enhancing operators capable of highlighting features which are considered perceptually relevant. We are able to extract salient curves and junctions ana' generate a description ranking these features by their likelihood of coming from the original scene. We suggest the global extenswnjleld as means of describing the behavior of a curve segment, in terms of its continuation...

Due to rapid advance of various video applications and services, such as video telephony, mobile video broadcasting, and Internet Protocol television (IPTV), there is an increasing demand for accurate and effective quality assessment of underlying videos. Accurate video quality assessment is crucial to video codec development, network protocol planning, in-network quality monitoring, quality as...

A background subtraction algorithm, based on center-surround saliency, is proposed. Background subtraction is formulated as the complement of saliency detection, by classifying non-salient (with respect to appearance and motion dynamics) points in the visual field as background. The algorithm is inspired by biological mechanisms of motion-based perceptual grouping, and extends a discriminant fo...

The latest High Efficiency Video Coding (HEVC) standard significantly improves coding efficiency over its previous video coding standards. The expense of such improvement is enormous computational complexity, from both encoding and decoding sides. Since computational capability and power capacity are diverse across portable devices, it is necessary to reduce decoding complexity to a target with...

We review a number of examples in which there appear to be “quantal” attributes in functions that relate positions or states of articulators and the acoustic and perceptual consequences of these actions. As a consequence of this review, we have attempted to specify more clearly what defines a quantal relation: the speech production system can assume a set of discrete states such that there are ...

Volume visualization has been widely used to depict complicated 3D structures in volume data sets. However, obtaining clear visualization of the features of interest in a volume is still a major challenge. The clarity of features depends on the transfer function, the viewpoint and the spatial distribution of features in the volume data set. In this paper, we propose visibility-weighted saliency...

Numerous studies have suggested that the deployment of attention is linked to saliency. In contrast, very little is known about how salient objects are perceived. To probe the perception of salient elements, observers compared two horizontally aligned stimuli in an array of eight elements. One of them was salient because of its orientation or direction of motion. We observed that the perceived ...

5th International Symposium on Visual Computing, Las Vegas, Nevada, USA, Nov 30 Dec 2, 2009 The goal of lossy image compression ought to be reducing entropy while preserving the perceptual quality of the image. Using gazetracked change detection experiments, we discover that human vision attends to one scale at a time. This evidence suggests that saliency should be treated on a per-scale basis,...