Pen computing

Abstract: We seek to improve the xperience of using pen computing devices by augmenting them with haptic, tactile feedback displays. We present the design of the haptic display for pen computers, and explore interaction techniques that allow users to feel GUI elements, textures, photographs and other interface elements with a pen. We discuss research directions in haptic displays for pen devices and report results of an early experimental study that evaluated the benefits of tactile feedback in pen computing.

Abstract: This paper describes a new approach to industrial styling design that combines the advantages of pen-based sketching with concepts from variational design to facilitate rapid and fluid development of 3D geometry. The approach is particularly useful for designing products that are primarily stylistic variations of existing ones. The input to the system is a 2D concept sketch of the object, and a generic 3D wireframe template. In the first step, the underlying template is aligned with the input sketch using a camera calibration algorithm. Next, the user traces the feature edges of the sketch on the computer screen; user's 2D strokes are processed and interpreted in 3D to modify the edges of the template. The resulting wireframe is then surfaced, followed by a user-controlled refinement of the initial surfaces using physically-based deformation techniques. Finally, new design edges can be added and manipulated through direct sketching over existing surfaces. Our preliminary evaluation involving several industrial products have demonstrated that with the proposed system, design times can be significantly reduced compared to those obtained through conventional software.

Abstract: In this paper, pen computing, i.e. the use of computers and applications in which the pen is the main input device, will be described from four different viewpoints. Firstly a brief overview of the hardware developments in pen systems is given, leading to the conclusion that the technological developments in this area have not led to the expected user acceptance of pen computing. The reasons underlying this market failure are explored. Problems of pen-user interface design are then described and existing and new applications are summarised. The handwriting process and product are discussed and, finally, automatic recognition methodologies are considered. Four basic factors determining handwriting variation and variability are identified. A handwriting recognition approach using segmentation into velocity-based strokes is considered in somewhat more detail.

Abstract: Modernizing workstations for air traffic controllers is a challenge: designers must increase efficiency without affecting safety in any way. Air traffic control is a time-intensive and safety-critical activity, and thus interaction efficiency and low error rates are crucial. Classical interaction techniques have been used in prototype workstations, but the resulting efficiency is not always satisfactory. This leads designers to consider more advanced interaction techniques. This paper reports on the design and a preliminary evaluation of the first prototype of project IMAGINE, which represents the second generation of graphical interfaces for air traffic control. This prototype, GRIGRI, uses a high resolution touch screen and provides mark based input through the screen. The use of gestures, as well as the use of multi-modal techniques, make interaction faster, and closer to the controllers’ habits.