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In this paper, we analyse first-person-view videos to develop a personalized user authentication mechanism. Our proposed algorithm generates provisional image-based passwords which benefit a variety of purposes such as unlocking a mobile device or fallback authentication. First, representative frames are extracted from the egocentric videos. Then, they are split into distinguishable segments before...
A decision-level fusion (DLF)-based team tactics estimation method in soccer videos is newly presented. In our method, tactics estimation based on audio-visual and formation features is newly adopted since the tactics of the soccer game are closely related to the audio-visual sequences and player positions. Therefore, by using these features, we classify the tactics via Support Vector Machine (SVM)...
Tracking unknown objects using adaptive tracking-by-detection approaches are widely used in computer vision. In these approaches, tracking problem is treated as an online classification problem, where the object classifier model is updated in the current frame to be used for classification process in the next frame. One of the approaches is based on Tracking-Learning-Detection (TLD) framework, where...
In this study we present a hybrid scheme aiming at tone mapping high dynamic range (HDR) videos into low dynamic range (LDR), to achieve the best possible way of showing HDR content on LDR displays. The proposed scheme selectively tone maps different regions of each frame such that the visually important information is preserved. Then, it applies an average-based technique to ensure there is no sudden...
In the long term research of visual attention, various computational models have been proposed. However, most of those works do not take audio into consideration. In practice, visual signals often come along with audio. Therefore, it is natural to investigate the influence of audio on visual attention. In this paper, we focus on the problem of when will audio influence visual attention during video...
In this study, the effect of pure synchronous and asynchronous transmission delay was examined in an interactive videotelephony setting. It was found that the conversational quality rated by participants of the study was clearly dependant on the tested conditions. This outcome can to some extend be ascribed to the used task which facilitated the usage of the visual channel for social interaction....
Many people report visual fatigue and discomfort while watching 3D displays. This situation is aggravated when subtitles are involved. However, little concern has been given to the issue of how to properly place the subtitles in 3D movies. In our work, subjective assessment has been carried out for 3D movies, in order to find out how much in depth is the appropriate position for placing subtitles,...
There are presented three unique e-learning formats, the BlackBox, the ComplexCase and the e-E-Exhibition designed for SCHOLA LUDUS Virtual Science Centre. A brand new educational approach is assigned for authentic co-constructivist learning. The formats are intended for discoveries of real processes by scientific approaches via scientific visualization, utilization of recent IT and digital display...
The Universal Model is an Human Computer Interaction model claimed to be applicable to any interactive system or product. In a computer-based user study, what users do and how fast they can do their tasks are the critical factors that can influence research results. Therefore, having a friendly and easy-to-use interface is crucial in a computer-based user study applications. In this paper, we present...
The database course needs to continue evolving to reflect changes in the computing environment and changes in current thought about how best to engage the student. We propose one possible evolution that is based on a semester-long multimedia database project involving a Web interface, called MeTube. The project supports uploading and downloading videos, images, and audio files as well as supplementary...
Graphical diagrams are an important part of the educational process, as students draw diagrams in fields as various as business, math, computer science, engineering, music, and many others. Hand-sketched student diagrams aid in active learning and creative processes. However, correcting hand-sketch diagrams take a significant amount of teacher time, and are thus often left out of the testing process...
In 3D computer graphics, it has been an important issue to describe a virtual object realistically and show it in a physically correct manner. Unlike the virtual reality(VR), the augmented reality (AR) is an environment containing virtual and real objects simultaneously. However, the difference in motion between the virtual and real objects is obvious, which makes it hard for AR to be realistic and...
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