3.3 Multi-slice CT Acquisition and Reconstruction for Body Imaging 52 3.3.1 Defi nition of the Pitch 52 3.3.2 The Cone-Angle Problem in Multi-slice CT 53 3.3.3 Multi-slice Spiral Reconstruction Neglecting the Cone-Beam Geometry 54 3.3.3.1 180° and 360° Multi-slice Linear Interpolation 54 3.3.3.2 z-Filter Approaches 56 3.3.4 Multi-slice Spiral Reconstruction with Cone-Beam Algorithms 58 3.3.4.1 ...

A catalog of nearby clusters in the 5800 deg area in the southern Galactic cap is constructed by applying a matched-filter clusterfinding algorithm to the sample of 3.3 million galaxies from the APM Galaxy Survey. I have preliminarily detected more than 4000 cluster candidates with estimated redshift of less than 0.2 and with richness similar to those of ACO clusters. Generally, a good correspo...

We investigate the ability of the Space Infrared Telescope Facility ’s Infrared Array Camera to detect distant (z ∼ 3) galaxies and measure their photometric redshifts. Our analysis shows that changing the original long wavelength filter specifications provides significant improvements in performance in this and other areas. Subject headings: cosmology: early universe — galaxies: evolution — in...

Let X be a completely regular space, and let A(X) be a subalgebra of C(X) containing C*{X). We study the maximal ideals in A(X) by associating a filter Z(f) to each / 6 A(X). This association extends to a oneto-one correspondence between M(A) (the set of maximal ideals of A(X)) and ßX. We use the filters Z(f) to characterize the maximal ideals and to describe the intersection of the free maxima...

Preliminary results are described for emission-line imaging of the field of a quasar at z = 0.9 with a unique new instrument — the TAURUS Tunable Filter (TTF). At least fourteen [O ii]-emitting galaxy candidates are found within ±750km s of the quasar redshift with a significance of > 3σ. Another eight candidates (> 3σ) are also found with relative velocities ±750−1500km s from the quasar, indi...

We study various multi-sensor PHD and CPHD filters and their implementations. 1 Problem Statement The state of the system is the collection of individual target states xk,i ∈ Rx and is denoted by the random finite set Xk = {xk,1, . . .xk,nk} where nk ≥ 0 is number of targets present at time k. We assume that the individual target dynamics are specified according to the Markovian model of the fo...

This paper presents the realization of a pseudoQuadrature Mirror Filter (QMF) cosinemodulated filter bank with low amplitude distortion at the frequencies around ω=0 or ω=π, and high but controlled aliasing in specific bands. We obtain the analysis and synthesis filters as Spectral Factorization Approach, but the prototype is different because is a symmetric linear-phase filter. This filter ban...

This paper proposes a new method of a pole controlled IIR adaptive digital filter (ADF) with a preceded FIR section, which consists of parallel connected second order IIR filters controlled by each inherent identification error. The FIR part works to identify a flat delay and responses resulting from poles near the origin of z-plane. On the other hand, the IIR part identifies poles near the uni...

In this paper a new method is presented to increase the frame rate of CGI (computer generated images) applications by means of image prediction. This method is based on Kalman filtering for the prediction of the new viewpoint position. The method processes two consecutive input images and the dedicated z-buffer content, which are computed by the graphics hardware, for the prediction of the next...

SAR (Synthetic Aperture Radar) imaging plays a central role in Remote Sensing due to, among other important features, its ability to provide high-resolution, day-and-night and almost weather-independent images. SAR images are affected from a granular contamination, speckle, that can be described by a multiplicative model. Many despeckling techniques have been proposed in the literature, as well...