Conventional centroid estimation fits a template point spread function (PSF) to image data. Because the PSF is typically not known to high accuracy, systematic errors exist. Here, we present an accurate centroid displacement estimation algorithm by reconstructing the PSF from Nyquist-sampled images. In absence of inter-pixel response variations, this method can estimate centroid displacement be...

Introduction: In many applications, ranking of fuzzy numbers is an important component of the decision process. Many authors have investigated the use of fuzzy sets in ranking alternatives and they have studied different methods of raking fuzzy sets. Particularly, the ranking of fuzzy numbers. In a paper by Cheng [A new approach for ranking fuzzy numbers by distance method, Fuzzy Sets and Syste...

The asymmetric unit of the title compound, C(24)H(20)N(2)S(4), contains one half-mol-ecule: a crystallographic centre of inversion is located at the mid-point of the two central C atoms. The thio-phene ring is oriented at a dihedral angle of 60.64 (3)° with respect to the benzene ring. In the crystal structure, π-π contacts between thio-phene rings [centroid-centroid distance = 3.581 (1) Å] may...

In radar, an extended target or structure is perceived as a collection of multiple point scatterers. For tracking determining the weighted mean (or centroid) angle these unresolved scatterers crucial. Our study demonstrates that monopulse estimate corresponds to circular angles scatterers, supported by both analytical and simulation results.

This paper presents a new approach to hierarchical clustering of point patterns. Two algorithms for hierarchical locationand densitybased clustering are developed. Each method groups points such that maximum intracluster similarity and intercluster dissimilarity are achieved for point locations or point separations. Performance of the clustering methods is compared with four other methods. The ...

Organ segmentation is a vital task in diagnostic medicine. The ability to perform it automatically can save clinicians time and labor. In this paper, a method to achieve automatic segmentation of organs in three–dimensional (3D), non–annotated, full–body magnetic resonance (MR), and computed tomography (CT) volumes is proposed. According to the method, training volumes are registered to a chose...

The title compound, C(28)H(20)N(2)O(4), was synthesized by the reaction of 2-(hydrazonometh-yl)phenyl benzoate with iodine. The mol-ecule possesses a crystallographically imposed center of symmetry at the mid-point of the hydrazine N-N bond. The substituents at the ends of the C=N bonds adopt an E,E configuration. Inter-molecular C-H⋯π(arene) hydrogen bonds and aromatic π-π stacking inter-actio...

In the binuclear copper(II) title complex, [Cu2(C9H7O4)4(C2H3N)2], an inversion centre is situtated at the mid-point of the Cu-Cu bond. The Cu(II) atom together with its four coordinated O atoms are in a distorted planar square arrangement while the nitro-gen and the other Cu(II) atom are located in apical positions. The whole mol-ecule looks like a paddle-wheel. In the crystal, chains are asse...