This paper is concerned with the derivation of closed-loop Stackelberg (CLS) solutions of a class of continuous-time two-player nonzero-sum differential games characterized by linear state dynamics and quadratic cost functionals. Explicit conditions are obtained for both the finite and infinite horizon problems under which the CLS solution is a representation of the optimal feedback solution of...

In this paper, a novel cluster-based approach for maximizing the energy efficiency of wireless small cell networks is proposed. A dynamic mechanism is proposed to group locallycoupled small cell base stations (SBSs) into clusters based on location and traffic load. Within each formed cluster, SBSs coordinate their transmission parameters to minimize a cost function which captures the tradeoffs ...

Perception-based lighting design approaches model image quality using a cognitively grounded objective function which is in turn optimized through manipulation of the lighting parameters of a scene. We present, and demonstrate, a detailed implementation of perception-based lighting design, including the application and evaluation of stochastic optimization using genetic algorithms.

Synthesizing face sketches from real photos and its inverse are well studied problems and they have many applications in digital forensics and entertainment. However, photo/sketch synthesis remains a challenging problem due to the fact that photo and sketch have different characteristics. In this work, we consider this task as an image-to-image translation problem and explore the recently popul...

Many multimedia applications require transmission of streaming video from a server to a client across an internetwork. In many cases loss may be unavoidable due to congestion or heterogeneous nature of the network. We explore how discard policies can be used in order to maximize the quality of service (QoS) perceived by the client. In our model the QoS of a video stream is measured in terms of ...

A dynamic call admission control and resource reservation scheme suitable for CDMA system is proposed. Preferential treatment is given to high priority calls by prereserving an interference guard margin (IGM), which is dynamically adjusted by referencing traffic conditions in neighboring cells based upon users’ quality of service. A comprehensive service model is used including users’ service r...

Although it is generally known that ray tracing is ’time consuming’, yet rewarding with respect to image quality, there are few attempts to predict the rendering time for a given model in advance. This paper focusses on the development of such a technique. The cost of ray tracing using adaptive spatial subdivisions has been studied by analysing the probability that a ray intersects an object. P...

The non-stationary nature of image characteristics calls for adaptive processing, based on the local image content. We propose a simple and flexible method to learn local tuning of parameters in adaptive image processing: we extract simple local features from an image and learn the relation between these features and the optimal filtering parameters. Learning is performed by optimizing a user d...

Prior work presented the sentence tracker, a method for scoring how well a sentence describes a video clip or alternatively how well a video clip depicts a sentence. We present an improved method for optimizing the same cost function employed by this prior work, reducing the space complexity from exponential in the sentence length to polynomial, as well as producing a qualitatively identical re...

This two-part paper presents a feedback-based crosslayer framework for distributed sensing and estimation of a dynamical process in a wireless sensor network (WSN) in which the sensor nodes (SNs) communicate their measurements to a fusion center (FC) via B orthogonal wireless channels. Cross-layer factors such as packet collisions and the sensingtransmission costs are accounted for. Each SN ada...