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Ego-network is built with a specific individual, i.e., the ego, and individuals connected to it, i.e., alter. As an abstraction of connection between individual and outside world, it usually has multiple attributions and has been applied to many research fields. Multivariate ego-network evolution assists users analyzing individual characteristic and hidden pattern in the network. However, most of...
Various versions of a typical control panels are experimentally analyzed both from the effectiveness and efficiency point of view. The stimuli differed in objects' locations within a panel, and the type of the expected response to the presented stimuli. The results of users' performance are investigated using classical analyses of variance. Moreover, visual activity of all examined persons gathered...
Text detection is typically the first step for any text processing such as hand-written text recognition, layout analysis, line detection, or writer identification. This paper describes a new method to detect text in images, particularly in historical document images. For a robust detection, we propose the use of the vesselness filter as a new preprocessing step for text detection. We show, that this...
Spatial mapping, the location in space of a perceived location due to an implanted electrode's electrical stimulation is important in the design of visual prostheses. Generally, a visual prosthesis system consists of an implanted electrode array, an external camera that acquires the image, and a transmitter that sends the information to the implanted electrodes. In cortical visual implant, the layout...
The growth of digital data is tremendous. Any aspect of life and matter is being recorded and stored on cheap disks, either in the cloud, in businesses, or in research labs. We can now afford to explore very complex relationships with many variables playing a part. But for this we need powerful tools that allow us to be creative, to sculpt this intricate insight formulated as models from the raw block...
Web applications differ from web sites as they have wide range of interactive features/functionalities and dynamic content. The content delivered via thin client or server driven architecture vary in size, structure and visual design. To accommodate such rich content care should be taken when designing user interface. Various methodologies exist to deliver the content to the users in an efficient...
With the explosive growth of information in dimension and magnitude, how to understand these complex data becomes a big challenge. Visualizing data with multivariate attributes is a hot research field in the information visualization domain. This paper makes a research of multivariate data visualization, and uses various attributes mapping method in visualizing movie network data for personalized...
Visual clarity checking is one of the criteria to assess when performing heuristic evaluation (HE). HE, as we already aware, is a practice where the usability experts use their expertise and knowledge in assessing websites or systems. Whilst the practice is commonly performed manually, using tools in HE would theoretically assist the experts, but to what extent? This paper attempts to answer the posed...
Word clouds are popular graphical representations used to effectively summarize the core content of a document, or of a set of documents. In particular, in a semantic word cloud the positions of the words also reflect their semantic correlation. Several algorithms have been proposed in the literature to compute semantic word clouds, both in a static and in a dynamic setting. However, so far, solutions...
As traditional visual tracking algorithms based on co-training framework are characterized by poor robustness in numerous real-time scenarios, a robust visual tracking algorithm based on structural multi-scale features adaptive fusion in co-training is thereby proposed. In order to achieve a comprehensive representation, we select structural multi-scale features in gray intensity space and local binary...
Diversity is a key characteristic of a classifier ensemble. A classifier ensemble must be composed of base classifiers with different performance in different areas of the problem space. Several works studied different diversity measures by performing extensive numerical experiments. However, up to our knowledge, no method has been proposed to visualize the diversity of a classifier ensemble. In this...
Large scale network has the characteristics of large number of nodes and complex structure, which makes it difficult to display in limited space. The paper proposes an expandable community division method for network visualization. The method use community detection algorithm based on network modularity to detect the network node and greedy algorithm to find the maximum modularity community. Different...
Node occlusion and edge congestion problems, which are caused by the increasing scale and complexity of network, had become a hot spot in network visualization research. To solve the visual clutter problem in network, edges close to each other in network were bundled by curving them. A segmental forced-directed algorithm (FDA) simplification model and a community based compatible edge bundling network...
In this paper it is presented a usability evaluation of an entertainment platform, well-known, YouTube. The main aim is to study how people with intellectual disabilities interact with the layout and uses their search field option. We intended to observe and analyze performance and satisfaction but also if the interface can give them autonomy on the search option. The results show that participants...
To help the work of TTCN-3 test system architects we created a tool that is able to visualize large test systems, fitting to daily work practices. We defined and implemented 2 layouts, clustering and interaction methods. We also show 2 structuring methods, that are not yet supported by the TTCN-3 standard. With this tool we have analyzed all standardized test suites available at www.ttcn3.org, finding...
Engineering of the compiled software is an important task in software engineering. One of the stages of the engineering technologies is a construction and analysis of a control flow graphs, which reflect a general structure of algorithms. The paper presents a technique for analyzing and visualizing the control flow graph of a compiled software. The analysis is based on semantically equivalent transformations...
Gamification is a recent phenomenon that emphasizes the process of incorporating game elements, for a specific purpose, into an existing system in order to maximise a user's experience and increase engagement with the system. In this paper, we discuss the effects of the introduction of the principles of gamification to a system for solving real-world container loading problems in a warehouse environment...
Power network diagrams are typically neither enlightening nor attractive to look at. Encouragingly, though, the visualization of generic complex networks has been an active area of research for the past two decades, and there now exist a number of widely-deployed algorithms that show a network's structure in a revealing and aesthetic way. Additionally, recent work by the present authors has proposed...
This paper presents an interactive visual analysis tool created for studying collections of video data. Our driving application is cellular behavior studies that use microscopy imaging methods. The studies routinely generate large amounts of videos with various experimental conditions. It is very time-consuming for the scientists to watch each video and manually extract features-of-interest for further...
This paper presents an 8 channel neural stimulator ASIC for biphasic stimulation of the visual cortex, realized in a 0.35 μm AMS HV process. Each channel is composed of an SPI interface, an 8-bit current digital-to-analog converter (DAC) and 120 V compliant HV output stage. Thus it is possible to deliver to the tissue arbitrary current waveforms with amplitudes up to ±10.24 mA with 40 μA steps. According...
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