Abstract: A system for interactive manipulation of graphs by a user applies constraints to obtain a visually pleasing display. The user adds nodes and edges to the graph. Visual Organization Feature (VOF) constraints are then applied to the nodes. The system uses a generalized spring algorithm to apply the constraints. Springs are attached to selected nodes to which a constraint is to be applied. The length and the second end-point of each spring are set based upon the constraint which is to be applied. The system then determines by simulation at-rest positions for all of the nodes based upon the springs. As the user adds, changes or deletes VOFs or changes the positions of the nodes, the graph is automatically reconfigured based upon the constraints. A user interface in connection with the graph drawing system provides a display for the graph and selection buttons for applying the VOFs.

Abstract: An interface is useful in browsing output vectors resulting from applying a transfer function to input data. The interface allows a user to explore effects of different parameter settings which make up the transfer function, particularly in connection with computer-generated and computer-modified images. The interface includes two portions, a central display panel and a surrounding area of a plurality of image displays. Thumbnail sketches of images corresponding to each of the output vectors are located in the central display panel to represent the relationships between the output vectors. The output vectors are processed to determine distances between them, and the distances are then projected to the two-dimensional display of the central display panel. The central display panel can be controlled to pan and zoom the display to review the thumbnail sketches. The user can then select different thumbnail sketches so that full-sized images are displayed in the plurality of image displays.

Abstract: A computer-based system for automatic pagination and layout of yellow pages or a commercial telephone directory uses a simulated annealing heuristic to refine a randomly determined candidate solution. The text and advertisements which are to be included in the yellow pages directory are ordered in two distinct data streams representing the order of text and the order of advertisements in the directory. The system determines a possible layout, called a candidate solution, by randomly setting parameters defining the pagination and layout. These parameters may include page breaks in the advertisement stream, column numbers for each advertisement, and an amount of padding or empty space to be added to each page. Once the parameters are set, the individual pages are laid out by putting the advertisements in the next available position in their assigned columns, and the text around the advertisements. The solution is scored based upon the guidelines for the format and layout of the yellow pages directory.

Abstract: A system and method for creating lighting for an image generates a large number of images based upon randomly selected light positions, types and directions. The images are then culled to reduce the number of images to be reviewed by a user. The images are culled to provide a set of images which best spans the lighting space represented by the large number of images. The culling process is iterative; at each iteration, the image which is most dissimilar from a nearest neighbor in the selected set is added to the selected set. The images are organized in a hierarchical structure to ease review by the user. The hierarchical structure separates the images into multiple levels. At each level, the images are separated into sets of equal size. Each set includes images which are most similar. An average image from each set is picked as the visual representation for that set. In creating the hierarchical structure, a single image may or may not be included in different subsets.