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A <italic>Collaborage</italic> is a collaborative collage of physically represented information on a surface that is connected with electronic information, such as a physical In/Out board connected to a people-locator database. The physical surface (board) contains items that are tracked by camera and computer vision technology. Events on the board trigger(More)
—Closed or nearly closed regions are an important form of perceptual structure arising both in natural imagery and in many forms of human-created imagery including sketches, line art, graphics, and formal drawings. This paper presents an effective algorithm especially suited for finding perceptually salient, compact closed region structure in hand-drawn(More)
We present a user interface design for labeling elements in document images at a pixel level. Labels are represented by overlay color, which might map to such terms as " handwriting " , " machine print " , " graphics " , etc. The primary purpose is to streamline processes for manual production of groundtruth data, which is necessary for training algorithms(More)
This paper describes our efforts to develop a " Digital Office " in which we augment a physical office setting with cameras and other electronic devices. Our goal is to bring the worlds of electronic and physical documents closer together and to facilitate the interaction of humans with all kinds of documents. In the " Digital Office " we extend the(More)
This paper presents a novel image editing program emphasizing easy selection and manipulation of material found in informal, casual documents such as sketches, handwritten notes, whiteboard images, screen snapshots, and scanned documents. The program, called <i>ScanScribe</i>, offers four significant advances. First, it presents a new, intuitive model for(More)
The human visual system makes a great deal more of images than the elemental marks on a surface. In the course of viewing, creating, or editing a picture, we actively construct a host of visual structures and relationships as components of sensible interpretations. This paper shows how some of these computational processes can be incorporated into(More)
This paper discusses the design of intelligent sketch editing tools exploiting intermediate levels of visual interpretation known as Perceptual Organization. Sketches are much more than an accumulation of strokes: they convey information largely through spatial configurations and patterns among markings. We propose that the detection of this visual(More)