Growing information spaces bring not only informational challenges, but also new opportunities for exploration. Drawing from maps as an analogy, we conceptualize information seekers as explorers of expanding information landscapes. While text has been the dominant frame of reference for information-seeking interfaces, visualization has the potential to expose faceted overviews and provide many ...

Non-uniform message distribution in interconnection networks is a common problem and causes network congestion. This paper proves that a careful choice of the routing algorithm can increase signiicantly the communication performance under pathological communication patterns, such as hot spots. A comparison between widely used e-cube routing and a new algorithm based on Computer Graphics line dr...

This paper describes a method to perform distance measurements inside buildings using a single video camera mounted on a mobile robot. This algorithm is designed specifically to create architectural floor plans with accurate measurements. Several issues associated with architectural surveying are discussed in detail, such as the visibility of features and the accuracy in calibration. Results of...

We present a system for content-based retrieval of line drawings. Line drawings are schematic diagrams consisting of two kinds of information, text and graphics. The textual part is indexed from the results of word recognition. The indexing for the graphic content uses no a-priori knowledge about the content of a drawing and depends only on features derived from the shape of graphic structures....

Important parameters which determine the effectiveness of plotting systems are visual acuity, accuracy of plotting mechanisms and the transfer functions embedded in their control systems. To relate the limits of visual acuity to the concept of aesthetically pleasing graphics invokes the notion of 'visual noise' in drawings. While the 'step size' is of overall import a nce, a high degree of 'squ...

An on-line graphics recognition system is presented, which provides users a natural, convenient, and efficient way to input rigid and regular shapes or graphic objects (e.g., triangles, rectangles, ellipses, straight line, arrowheads, etc.) by quickly drawing their sketchy shapes in single or multiple strokes. An input sketchy (hand-drawn) shape is immediately converted into the user-intended r...

This thesis is centred around the question of how dynamic pictures can be created and manipulated directly, analogous to drawing images, in an attempt to overcome traditional abstract textual program representations and interfaces (coding). To explore new ideas, Vogo1 is presented, an experimental, spatially-oriented, direct manipulation, live programming environment for Logo Turtle Graphics. I...

Diag is a preprocessor for drawing diagrams for I4m documents. The user prepares a text file containing commands in the diag language which are processed by diag producing f i g commands which are then processed by t ransf i g producing commands in a variety of formats acceptable to I4m. The diag preprocessor interprets a language with graphics commands using infix expressions with user-defined...