-Estimation theory is used to derive a new approach to the clustering problem. The new method is a unification of centroid and mode estimation, achieved by considering the effect of spatial scale on the estimator. The result is a multiresolution method which spans a range of spatial scales, giving enhanced robustness both to noise in the data and to changes of scale in the data, by using compar...

W h y and how one should study a scale-space is prescribed by the universal physical law of scale invariance, expressed by the so-called Pi-theorem. The fact that any image is a physical observable with an inner and outer scale bound, necessarily gives rise to a 'scale-space representation', in wphich a given image is represented by a one-dimensiond family of images representing that image on v...

Tonsillectomy is one of the most common surgical procedures for otolaryngologists. Although tonsillectomy procedures are common, like any surgical procedure, there are post-operative complaints and complications. The aim of this retrospective study was to evaluate the pattern of post-operative pain in tonsillectomy using the harmonic scalpel (HS). 43 patients were entered into this study (13 me...

ÐWe propose a new computational method for segmenting topological subdimensional point-sets in scalar images of arbitrary spatial dimensions. The technique is based on calculating the homotopy class defined by the gradient vector in a subdimensional neighborhood around every image point. This neighborhood is defined as the linear envelope spawned over a given subdimensional vector frame. In the...

Various biological correlates of general intelligence (g) have been reported. Despite this, however, the relationship between neurological measurements and g is not fully clear. We use structural equation modeling to model the relationship between behavioral Wechsler Adult Intelligence Scale (WAIS) estimates of g and neurological measurements (voxel-based morphometry and diffusion tensor imagin...

OBJECTIVES To develop an index-based, seven subtest, short form of the WAIS-III that offers the same comprehensive range of analytic methods available for the full-length version. DESIGN AND METHODS Psychometric. RESULTS The short-form indices had high reliability and criterion validity. Scores are expressed as index scores and as percentiles. Methods are provided that allow setting of conf...

Vision systems in complex environments are faced with the problem of analyzing visual information on multiple scales to support segmentation and size invariant object recognition. We propose a system which detects relevant spatial scales in images and constructs an explicit size invariant representation. Further, it provides a means of navigating through scale space in the presence of ambiguous...

In this paper we extend the notion of Poisson scale-space. We propose a generalisation inspired by the linear parabolic pseudodifferential operator √−∆+m2−m, 0 ≤ m, connected with models of relativistic kinetic energy from quantum mechanics. This leads to a new family of operators {Qt | 0 ≤ m, t} which we call relativistic scale-spaces. They provide us with a continuous transition from the Pois...