Dongxing Teng

KnitSketch: A Sketch Pad for Conceptual Design of 2D Garment Patterns

In this paper, we present a new sketch-based system - KnitSketch, to improve the efficiency of process planning for knitting garments at an early design stage. The KnitSketch system utilizes sketching interface with the pen-paper metaphor and users only need to draw outlines of different parts of the garment. Based on sketching understanding, the system automatically makes reasonable geometric inferences about the process-planning data of the garment. The system is designed for nonprofessional users and can design diverse garment styles by freehand drawings. The contributions of this work include contextual extraction of reusable data from sketches, a MDG structure for sketch beautification, and an integrated system with natural expression and effective communication that reduces the cognitive load of human beings. User experience shows that the proposed system helps designers focus on the task instead of the designing tools, and thus improves the efficiency and productivity of human beings.

An adaptive sketching user interface for education system in virtual reality

Sketching user interface and virtual reality (VR) techniques to education application has become popular, promising to make the teaching and learning experience more natural and efficient for users. The adaptive support can improve the intelligence during the interaction process between user and systems to emphasize the individual needs. In this paper, we present the sketching user interface for geometry teaching and the VR class integrated with the corresponding adaptation support, which meet the requirements for the education application. Furthermore, we analyze the sketch context for adaptive mechanism in the education system with an instance. Finally, a prototype based on the methods above is developed. An informal study is also done to show that it enhances the accessibility and individualization during the process of teaching and learning and helps to enhance user experience in human computer interaction.

Visualizing time-series data in processlines: design and evaluation of a process enterprise application

In modern process industry, it is often difficult to analyze a manufacture process due to its numerous time-series data. Analysts wish to not only interpret the evolution of data over time in a working procedure, but also examine the changes in the whole production process through time. To meet such analytic requirements, we have developed ProcessLines, an interactive visualization tool for a large amount of time-series data in process industry. The data are displayed in a fisheye timeline. ProcessLines provides good overviews for the whole production process and details for the focused working procedure. A user study using beer industry production data has shown that the tool is effective.

An approach to visual analysis for task flow management

Efficient management of task flow plays an important role in prediction, planning, control and optimization of tasks. In this paper, according to major indicators to evaluate during task flow management such as time performance, resource allocation efficiency and executory costs we establish a task flow management oriented business model and analyze important operations performed in evaluation, analysis, and optimization of task flow. Based on the business model, in the view of problems from multi-source and heterogeneous data without standardized description, we define a unified data model to give a description for the massive and heterogeneous task flow data. Then we further demonstrate a complex task flow oriented visualization morphology design, with corresponding layout algorithm, and introduce the Focus + Context technique to assist users in analyzing task flows and making accurate decisions. Finally, we develop a task flow management oriented visual analysis prototype system, and apply it into medical process management. Experimental results show that this system can effectively support analysis and evaluation of execution progress, time performance, resource utilization, cost, etc., which can improve efficiency of the task flow management and contribute to quick and accurate decision-making.

A developing framework for interactive temporal data visualization

This article presents UCFM, a user-centered developing framework for interactive temporal data visualization. UCFM is comprised mainly by software architecture and software development methods. The software architecture describes modules in interactive temporal data visualization system and their relationships. And based on the software architecture and development practice, the software development methods summarize these specific steps to design and develop interactive temporal data visualization system. To demonstrate UCFMs validity, the development process of an interactive temporal data visualization application is illustrated.

A Sketch-based Interface for Interactive Process Planning Design in Pervasive Computing Environment

In this paper, we present a new interface for rapidly creating and modifying the process planning design for knitting garments. Designers (or like technologist for process planning ) expect better looking interfaces that are also easy to use to improve high efficiency and productivity and to focus on task itself instead of tools as providing the invisibility in pervasive computing. With the benefits of traditional pen and pencil metaphor, sketch-based interface can meet the requirements of personality and diversification during the process planning. It allows users to conduct the process planning drawings by sketching, exploring and modifying their ideas interactively, with immediate visual feedback. Our results show that the system can be used to create a broad range of clothes naturally and effectively.

Cooperative concept map based on cognitive model for visual analysis

The ability to recognize users and their intention during the visual analysis process is important to interact intelligently and effortlessly in a cooperative environment. In this paper, we present the framework for creating and modifying a concept map that allows analysts to collaborate and utilize live collection of enterprise data in a visual interface. Based on modeling users and tasks in visual analysis, a user model supporting collaborative analysis is given. Furthermore, we propose the algorithm of concept map layout to facilitate the visual analysis. The interface presents the analyst with the dashboard configuration of certain data that users deems relevant, provides tools to facilitate the decision making process. Finally, we apply it to a collaborative visual decision support system. Experimental results show that it enhances the accessibility and the individualization of collaborative concept map for configuring enterprise data and helps to enhance user experience during the visual analysis process.

ProcessLine: Visualizing time-series data in process industry

In modern process industry, it is often difficult to analyze a manufacture process due to its numerous time-series data. Analysts wish to not only interpret the evolution of data over time in a working procedure, but also examine the changes in the whole production process through time. To meet such analytic requirements, we have developed ProcessLine, an interactive visualization tool for a large amount of time-series data in process industry. The data are displayed in a fisheye timeline. ProcessLine provides good overviews for the whole production process and details for the focused working procedure. A preliminary user study using beer industry production data has shown that the tool is effective.

Interactive Context-Aware Modeling of Concept Sketch and Operation

In this paper, we present a framework of modeling concept sketch and sketching interaction based on context-awareness. And an operational model for sketching interface has been developed. This new model can guide and help new sketch-based interface development. From a software engineering point of view, the operational model can be implemented as a basic class with a set of standard operational functions. New applications with different context contents can be easily derived from it and developed further. This framework can support all the tasks that are common across applications, requiring the interface designer to only provide support for the application-specific tasks. This new operational model has been implemented and tested with different context. It is capable of and applicable for modeling various sketching interfaces and applications.

Adaptive user interactive sketching for teaching based on pen gesture

In this paper, the pen-based adaptive interface architecture for geometric teaching is presented to facilitate natural interactive sketching for geometric graphics application. Based on user-centered design, it analyzes the intent-based manipulation in terms of context based on pen gesture. By providing adaptive constraint capture and dynamic interaction this architecture can improve operation efficiency of the interface and reduce users mental workload. Furthermore, it provides an educational application for benefiting teaching experience by preventing users from being interrupted in class.