Computer vision

The field of computer vision is surveyed and assessed, key research issues are identified, and possibilities for a future vision system are discussed. The problems of descriptions of two and three dimensional worlds are discussed. The representation of such features as texture, edges, curves, and corners are detailed. Recognition methods are described in which cross correlation coefficients are maximized or numerical values for a set of features are measured. Object tracking is discussed in terms of the robust matching algorithms that must be devised. Stereo vision, camera control and calibration, and the hardware and systems architecture are discussed

Free-hand sketch synthesis with deformable stroke models

We present a generative model which can automatically summarize the stroke composition of free-hand sketches of a given category. When our model is fit to a collection of sketches with similar poses, it discovers and learns the structure and appearance of a set of coherent parts, with each part represented by a group of strokes. It represents both consistent (topology) as well as diverse aspects (structure and appearance variations) of each sketch category. Key to the success of our model are important insights learned from a comprehensive study performed on human stroke data. By fitting this model to images, we are able to synthesize visually similar and pleasant free-hand sketches

Bringing the marks on a whiteboard to electronic life

Abstract. This paper discusses our implementation and experience with a camera-based whiteboard scanner. The ZombieBoard system (so called because it brings to electronic life the marks on a whiteboard) is built into both the physical environment and the information space, while augmenting and linking the two. Computer vision underlies two key technology components. First, image mosaicing is used to obtain highresolution images of large surfaces using relatively low-resolution cameras. Second, real time activity analysis and line drawing analysis enable a Diagrammatic User Interface whereby commands are issued to the system by drawing on the whiteboard itself. The system has been in routine use at our research center for two years and has demonstrated the value of this approach to linking whiteboards with the electronic document world