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- Azriel Rosenfeld, Robert A. Hummel, Steven W. Zucker
- IEEE Trans. Systems, Man, and Cybernetics
- 1976

Given a set of objects in a scene whose identifications are ambiguous, it is often possible to use relationships among the objects to reduce or eliminate the ambiguity. A striking example of this approach was given by Waltz [13]. This paper formulates the ambiguity-reduction process in terms of iterated parallel operations (i.e., relaxation operations)… (More)

- R R Coifman, S Lafon, +4 authors S W Zucker
- Proceedings of the National Academy of Sciences…
- 2005

We provide a framework for structural multiscale geometric organization of graphs and subsets of R(n). We use diffusion semigroups to generate multiscale geometries in order to organize and represent complex structures. We show that appropriately selected eigenfunctions or scaling functions of Markov matrices, which describe local transitions, lead to… (More)

- Robert A. Hummel, Steven W. Zucker
- IEEE Transactions on Pattern Analysis and Machine…
- 1983

A large class of problems can be formulated in terms of the assignment of labels to objects. Frequently, processes are needed which reduce ambiguity and noise, and select the best label among several possible choices. Relaxation labeling processes are just such a class of algorithms. They are based on the parallel use of local constraints between labels.… (More)

We have been developing a theory for the generic representation of 2-D shape, where structural descriptions are derived from the shocks (singularities) of a curve evolution process, acting on bounding contours. We now apply the theory to the problem of shape matching. The shocks are organized into a directed, acyclic shock graph, and complexity is managed… (More)

- Pierre Parent, Steven W. Zucker
- IEEE Trans. Pattern Anal. Mach. Intell.
- 1989

We describe a novel approach to curve inference based on curvature information. The inference procedure is divided into two stages: a trace inference stage, to which this paper is devoted, and a curve synthesis stage, which will be treated in a separate paper. It is shown that recovery of the trace of a curve requires estimating local models for the curve… (More)

- James H. Elder, Steven W. Zucker
- IEEE Trans. Pattern Anal. Mach. Intell.
- 1996

—The standard approach to edge detection is based on a model of edges as large step changes in intensity. This approach fails to reliably detect and localize edges in natural images where blur scale and contrast can vary over a broad range. The main problem is that the appropriate spatial scale for local estimation depends upon the local structure of the… (More)

- Benjamin B. Kimia, Allen Tannenbaum, Steven W. Zucker
- International Journal of Computer Vision
- 1995

We undertake to develop a general theory of two-dimensional shape by elucidating several principles which any such theory should meet. The principles are organized around two basic intuitions: first, if a boundary were changed only slightly, then, in general, its shape would change only slightly. This leads us to propose an operational theory of shape based… (More)

- James H. Elder, Steven W. Zucker
- ECCV
- 1996

Existing methods for grouping edges on the basis of local smoothness measures fail to compute complete contours in natural images: it appears that a stronger global constraint is required. Motivated by growing evidence that the human visual system exploits contour closure for the purposes of perceptual grouping 6, 7, 14, 15, 255, we present an algorithm for… (More)

- Kaleem Siddiqi, Sylvain Bouix, Allen Tannenbaum, Steven W. Zucker
- International Journal of Computer Vision
- 2002

The eikonal equation and variants of it are of significant interest for problems in computer vision and image processing. It is the basis for continuous versions of mathematical morphology, stereo, shape-from-shading and for recent dynamic theories of shape. Its numerical simulation can be delicate, owing to the formation of singularities in the evolving… (More)

- A Dobbins, S W Zucker, M S Cynader
- Nature
- 1987

Neurons in the visual cortex typically respond selectively to the orientation, and velocity and direction of movement, of moving-bar stimuli. These responses are generally thought to provide information about the orientation and position of lines and edges in the visual field. Some cells are also endstopped, that is selective for bars of specific lengths.… (More)