Results 261 to 270 of about 196,338 (298)
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Fan-beam reconstruction from a straight line of source points
IEEE Transactions on Medical Imaging, 1993A fan-beam tomographic reconstruction algorithm is developed for source points distributed along a straight line. It is shown that, in theory, a perfect reconstruction is possible from an infinitely long straight line. Using computer simulations it is verified that using a finite segment of a straight line, it is possible to reconstruct images with ...
Bruce D. Smith 0001, Tarkeshwar Singh
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Upward Straight-Line Embeddings of Directed Graphs into Point Sets
2008In this paper we consider the problem of characterizing the directed graphs that admit an upward straight-line embedding into every point set in convex or in general position. In particular, we show that no biconnected directed graph admits an upward straight-line embedding into every point set in convex position, and we provide a characterization of ...
Alejandro Estrella-Balderrama +2 more
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Document localization algorithms based on feature points and straight lines
Tenth International Conference on Machine Vision (ICMV 2017), 2018The important part of the system of a planar rectangular object analysis is the localization: the estimation of projective transform from template image of an object to its photograph. The system also includes such subsystems as the selection and recognition of text fields, the usage of contexts etc.
Natalya Skoryukina +3 more
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covering grid points in a convex polygon with straight lines∗
International Journal of Computer Mathematics, 1992We consider the following problem: Find a set of parallel straight lines with equal spacing to hit all m grid points in a closed region bounded by a convex polygon P with n vertices such that size of this set is minimal. We use continued fraction expansions to explore the combinatorial properties of this problem and propose an O{n + log m)approximation
Hsuan-Shih Lee, Ruei Chuan Chang
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Neutrosophic Divisor Point of A Straight Line Segment With A Given Ratio
Pure Mathematics for Theoretical Computer Science, 2023This paper is dedicated to study the neutrosophic divisor point with a known ratio, where we use the principals of neutrosophic Euclidean geometry to get the desired results, and we illustrate many examples that explain the novelty of our work.
Malath Fared Alaswad, Rasha Dallah
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Straight-Ahead Pointing Correlates with Long-Line Bisection in Neglect Patients
Cortex, 2004The spatial bias of neglect patients has been assumed to result from the alteration of a body-centred representation which underlies actions within personal and extra-personal spaces. This deficit seems to correspond to the ipsilesional deviation of the subjective straight-ahead (SSA), often described in neglect patients.
Richard, Christelle +3 more
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Parallel Algorithms for Joining Two Points by a Straight-Line Segment
IEEE Transactions on Computers, 1974After an overview of the cellular logic image processor, CLIP 3, parallel algorithms for joining two points are described. These real time algorithms are simple, work properly, preserve the connectivity, are based only on logic, and show much of the behavior of processing occurring in sensory elements of animals.
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The Most Accurate Path from Point A to Point B is Not Necessarily a Straight Line
AIAA Guidance, Navigation, and Control Conference, 2012Abstract : This work studies the problem of guiding a vehicle from a known initial location to a known goal location as accurately as possible, without direct observation of the goal location (such as a bearing measurement, or line-of-sight to the goal), and without direct position measurements, such as those provided by GPS.
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A straight line is the shortest distance between two points
The Mathematical Gazette, 1974The popular definition of a “straight line” as “the shortest distance between two points” is one of the few pieces of mathematical jargon in general circulation in the English language. This is unfortunate, for it is not a good definition, and one may well wonder who originated it.
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Visual extrapolation of a line segment to the point of its intersection with a straight line. II.
Acta physiologica et pharmacologica Bulgarica, 1977The article describes three experiments to study visual extrapolation of a line segment to the point of its intersection with a straight line. Eye movements are shown to play no significant role in solving problems involving visual spatial extrapolation.
N, Yakimoff, L, Mitrani, S, Mateef
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