<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>1434</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2011-12-19</completedDate>
    <publishedDate>2011-12-19</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Perception-Oriented Picking of Structures in Direct Volumetric Renderings</title>
    <abstract language="eng">Radiologists from all application areas are trained to read slice-based visualizations of 3D medical image data. Despite the numerous&#13;
examples of sophisticated three-dimensional renderings, especially all variants of direct volume rendering, such methods are&#13;
often considered not very useful by radiologists who prefer slice-based visualization. Just recently there have been attempts to bridge this&#13;
gap between 2D and 3D renderings. These attempts include specialized techniques for volume picking that result in repositioning slices. &#13;
&#13;
In this paper, we present a new volume picking technique that, in contrast to previous work, does not require pre-segmented data or metadata. The positions picked by our method are solely based on the data itself, the transfer function and,&#13;
most importantly, on the way the volumetric rendering is perceived by viewers. To demonstrate the usefulness of the proposed method&#13;
we apply it for automatically&#13;
repositioning slices in an abdominal MRI&#13;
scan, a data set from a flow simulation and a number of other volumetric scalar fields. Furthermore we discuss how the method can be implemented in combination with various different volumetric rendering techniques.</abstract>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="serial">11-45</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-14343</identifier>
    <enrichment key="PeerReviewed">no</enrichment>
    <author>Alexander Wiebel</author>
    <submitter>Alexander Wiebel</submitter>
    <author>Frans M. Vos</author>
    <author>Hans-Christian Hege</author>
    <series>
      <title>ZIB-Report</title>
      <number>11-45</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>DVR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>picking</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>pointing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>direct volume rendering</value>
    </subject>
    <collection role="ccs" number="J.2">PHYSICAL SCIENCES AND ENGINEERING</collection>
    <collection role="ccs" number="J.3">LIFE AND MEDICAL SCIENCES</collection>
    <collection role="msc" number="68-XX">COMPUTER SCIENCE (For papers involving machine computations and programs in a specific mathematical area, see Section -04 in that area)</collection>
    <collection role="institutes" number="vis">Visual Data Analysis</collection>
    <collection role="persons" number="hege">Hege, Hans-Christian</collection>
    <collection role="projects" number="VIGOR++">VIGOR++</collection>
    <collection role="institutes" number="VDcC">Visual and Data-centric Computing</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1434/result.pdf</file>
  </doc>
  <doc>
    <id>1807</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2013-04-22</completedDate>
    <publishedDate>2013-04-22</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Computation and Application of 3D Strokes on Visible Structures in Direct Volume Rendering</title>
    <abstract language="eng">In this paper we describe VisiTrace, a novel technique to&#13;
draw 3D lines in 3D volume rendered images. It allows to&#13;
draw strokes in the 2D space of the screen to produce 3D&#13;
lines that run on top or in the center of structures actually&#13;
visible in the volume rendering. It can handle structures&#13;
that only shortly occlude the structure that has been visible at the starting point of the stroke and is able to ignore&#13;
such structures. For this purpose a shortest path algorithm&#13;
finding the optimal curve in a specially designed graph&#13;
data structure is employed. We demonstrate the usefulness of the technique by applying it to MRI data from&#13;
medicine and engineering, and show how the method can&#13;
be used to mark or analyze structures in the example data&#13;
sets, and to automatically obtain good views toward the&#13;
selected structures.</abstract>
    <identifier type="issn">1438-0064</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-18070</identifier>
    <enrichment key="PeerReviewed">no</enrichment>
    <author>Alexander Wiebel</author>
    <submitter>Alexander Wiebel</submitter>
    <author>Philipp Preis</author>
    <author>Frans M. Vos</author>
    <author>Hans-Christian Hege</author>
    <series>
      <title>ZIB-Report</title>
      <number>13-20</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>DVR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>interaction</value>
    </subject>
    <collection role="ccs" number="I.">Computing Methodologies</collection>
    <collection role="institutes" number="vis">Visual Data Analysis</collection>
    <collection role="persons" number="hege">Hege, Hans-Christian</collection>
    <collection role="institutes" number="VDcC">Visual and Data-centric Computing</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/1807/ZR-13-20.pdf</file>
  </doc>
</export-example>
