Temporally Coherent Disparity Maps Using CRFs with Fast 4D Filtering

State of the art methods for disparity estimation achieve good results for single stereo frames, but temporal coherence in stereo videos is often neglected. In this paper we present a method to compute temporally coherent disparity maps. We define an energy over whole stereo sequences and optimize their Conditional Random Field (CRF) distributions using mean-field approximation. We introduce novel terms for smoothness and consistency between the left and right views, and perform CRF optimization by fast, iterative spatio-temporal filtering with linear complexity in the total number of pixels. Our results rank among the state of the art while having significantly less flickering artifacts in stereo sequences.

Fast magnetic resonance temperature imaging for focused ultrasound thermal therapy

The current standard for temperature sensitive imaging using magnetic resonance (MR) is 2-D, spoiled, fast gradient-echo (fGRE) phase-difference imaging exploiting temperature dependent changes in the proton resonance frequency (PRF). The echo-time (TE) for optimal sensitivity is larger than the typical repetition time (TR) of an fGRE sequence. Since TE must be less than TR in the fGRE sequence, this limits the technique's achievable sensitivity, spatial, and temporal resolution. This adversely affects both accuracy and volume coverage of the measurements. Accurate measurement of the rapid temperature changes associated with pulsed thermal therapies, such as high-intensity focused ultrasound (FUS), at optimal temperature sensitivity requires faster acquisition times than those currently available. ^ Use of fast MR acquisition strategies, such as interleaved echo-planar and spiral imaging, can provide the necessary increase in temporal performance and sensitivity while maintaining adequate signal-to-noise and in-plane spatial resolution. This research explored the adaptation and optimization of several fast MR acquisition methods for thermal monitoring of pulsed FUS thermal therapy. Temperature sensitivity, phase-difference noise and phase-difference to phase-difference-to noise ratio for the different pulse sequences were evaluated under varying imaging parameters in an agar gel phantom to establish optimal sequence parameters for temperature monitoring. The temperature sensitivity coefficient of the gel phantom was measured, allowing quantitative temperature extrapolations. ^ Optimized fast sequences were compared based on the ability to accurately monitor temperature changes at the focus of a high-intensity focused ultrasound unit, volume coverage, and contrast-to-noise ratio in the temperature maps. Operating parameters, which minimize complex phase-difference measurement errors introduced by use of the fast-imaging methods, were established. ^

Fast Algorithms Using Minimal Data Structures for Common Topological Relationships in Large, Irregularly-spaced Topographic Data Sets

Digital terrain models (DTM) typically contain large numbers of postings, from hundreds of thousands to billions. Many algorithms that run on DTMs require topological knowledge of the postings, such as finding nearest neighbors, finding the posting closest to a chosen location, etc. If the postings are arranged irregu- larly, topological information is costly to compute and to store. This paper offers a practical approach to organizing and searching irregularly-space data sets by presenting a collection of efficient algorithms (O(N),O(lgN)) that compute important topological relationships with only a simple supporting data structure. These relationships include finding the postings within a window, locating the posting nearest a point of interest, finding the neighborhood of postings nearest a point of interest, and ordering the neighborhood counter-clockwise. These algorithms depend only on two sorted arrays of two-element tuples, holding a planimetric coordinate and an integer identification number indicating which posting the coordinate belongs to. There is one array for each planimetric coordinate (eastings and northings). These two arrays cost minimal overhead to create and store but permit the data to remain arranged irregularly.

Fashion Notes ; Modebericht

Rose Löw

Fashion Notes ; Modebericht

F. H-K

Children's Fashion ; Kindermode [Illustration]

Scan von Monochrom-Mikroform

Fashion Notes

Modebericht [[Elektronische Ressource]] / F. H-K

Fashion Notes ; Modebericht

F. H-K

Fashion Notes ; Modebericht

-o-

Wunderseltzame, und fast unerhörte Kindertracht : von Anna Maria Mußin, einer Bäurin in Unter-Bayern ...

Zwei riesenwüchsige Kleinkinder als Volksbelustigung

Unparteysche beschreibung, gemeinister Victualien, was dieselben in̄ zeit Augspurgischer Bloqvierung, von vngefahr anfang deß Monats Novemb. Anno 1634 biß fast zu ende deß Martii, Anno 1635 ... gegolten : Vnd entgegen wie dergleichen Sachen, die zwey Jar, Anno 1640 vnd 1641 ... nach der menge, in ringem Preß, sein zubekom̄en gewesen ...

[C. A. A. ; JE scu.]

Giovanni Succi, Ganzfigurbidnis, before his fast

Signatur des Originals: S 36/F11201

Moed, Von den Rechten und Sazungen des Sabbaths, der Feyer- und Fast-Tage

von Johann Jacob Rabe

An den Wassern von Babylon : ein fast heiteres Judenbüchlein

[Hermann Sinsheimer... Umschlagzeichn.: Ernst E. Stern]