A method to probe the guiding characteristics of waveguides formed in real-time is proposed and evaluated. It is based on the analysis of the time dependent light distribution observed at the exit face of the waveguide while progressively altering its index profile and probed by a large diameter optical beam. A beam propagation method is used to model the observed dynamics. The technique is app...

Digital Photo images are everywhere, on the covers of magazines, in newspapers, in courtrooms, and all over the Internet. We are exposed to them throughout the day and most of the time. Ease with which images can be manipulated; we need to be aware that seeing does not always imply believing. We propose methodologies to identify such unbelievable photo images and succeeded to identify forged re...

Three-dimensional building model is one of the most important components in a cyber city implementation. Currently, however, most building models do not have sufficient and accurate texture information. The lack of texture not only makes 3D building models less realistic in visualization, it may also fail to provide needed information in intricate applications. This study developed a polygon-ba...

Having digital literacy requires more than just the ability to use software or to operate a digital device; it includes a large variety of complex skills such as cognitive, motoric, sociological and emotional skills that users need to master in order to use digital environments effectively. Unfortunately, the research on digital literacy lacks a well-established theoretical framework. This pape...

There are a variety of techniques for combining the three different images into a single image, but the main limitation is the dynamic range of the media that the photo will finally be displayed on. Paper and digital monitors, like digital sensors, are “low dynamic range” devices, and thus cannot demonstrate the greater dynamic range that has been captured. Tonemapping is one process by which h...

In this paper we describe a design-orientated field study in which we deploy a novel digital display device to explore the potential integration of teenage and family photo displays at home, as well as the value of situated photo display technologies for intergenerational expression. This exploration is deemed timely given the contemporary take-up of digital capture devices by teenagers and the...

This study presents a robust indexing and retrieval scheme for digital photos with speech annotations based on the syllable-transformed patterns. In speech retrieval application, out-of-vocabulary and recognition error problems are generally prone to incorrect transcription and therefore degrade the retrieval performance. In this study, the recognized n-best syllable candidates for each syllabl...

In recent years there has been a dramatic increase in digital photography. Market research institute IDC, quoted by C|Net1, reports an increase in digital camera sales of 15% from 2005’s figure of 92.3 million to 105.7 million in 2006. This leads in turn to new markets for photo printing, storage and sharing. Our focus is on the online photo sharing communities, where we can find sites such as ...

One of the effective ways to manage large collections of digital photos is to tag names of people appearing in those photos. However, the number of people appearing in photo collections may range in the hundreds and the names of tagged people are usually presented in alphabetical order or on a first-tag first-place basis. As a result, it is difficult to quickly search for name tags that a user ...

Images have always been considered a reliable source of evidence in the past. Today, the wide availability of photo editing software urges us to investigate the origin and the integrity of a digital image before trusting it. Although several algorithms have been developed for image integrity verification, a comprehensive tool that allows the analyst to synergically exploit these algorithms, and...