Gideon Frieder

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In many three-dimensional imaging applications the three-dimensional scene is represented by a three-dimensional array of volume elements, or voxels for short. A subset Q of the voxels is specified by some property. The objects in the scene are then defined as subsets of Q formed by voxels which are “connected” in some appropriate sense. It is(More)
We review a variety of techniques to improve efficiency in information retrieval. Given the increasing volumes of data that are available electronically, understanding and using such techniques is critical. We address several efficiency concerns, but our primary focus is on index processing since it dominates the computational demands of information(More)
This paper presents an introduction to the field of three-dimensional medical imaging It presents medical imaging terms and concepts, summarizes the basic operations performed in three-dimensional medical imaging, and describes sample algorithms for accomplishing these operations. The paper contains a synopsis of the architectures and algorithms used in(More)
Often documents of historic significance are discovered in a state of disrepair. Such documents are commonly scanned to simultaneously archive and publicize a discovery. Converting the information found within such documents to public knowledge occurs more quickly and cheaply if an automatic method to enhance these degraded documents is used instead of(More)
We have developed a computer-resident stereotactic atlas of the human brain that quantitatively defines subcortical structures within anatomical landmarks detected on obliquely reconstructed computed tomography (CT) slices. Horizontal stereotactic atlas sections can be stretched and contracted by polar transformation and labeled by a computer to fit within(More)
Computer scientists are familiar with options in which there are no middle choices between true and false. The lack of such choices is inconvenient—even critical—for example, when determining whether the status of a computer system is go or no-go. Multiple-valued logic is concerned with these intermediate choices. The development of multiple-valued logic is(More)
The development of the research project in microprogramming and emulation at State University of New York at Buffalo consisted of three phases: the evaluation of various possible machines to support this research; the decision to purchase one such machine, which appears to be superior to the others considered; and the organization and definition of goals(More)