Evaluation of depth perception in crowded volumes

Lesar, Žiga (author), Bohak, Ciril (author), Marolt, Matija (author)

Depth perception in volumetric visualization plays a crucial role in the understanding and interpretation of volumetric data. Numerous visualization techniques, many of which rely on physically based optical effects, promise to improve depth perception but often do so without considering camera movement or the content of the volume. As a result, the findings from previous studies may not be directly applicable to crowded volumes, where a large number of contained structures disrupts spatial perception. Crowded volumes therefore require special analysis and visualization tools with sparsification capabilities. Interactivity is an integral part of visualizing and exploring crowded volumes, but has received little attention in previous studies. To address this gap, we conducted a study to assess the impact of different rendering techniques on depth perception in crowded volumes, with a particular focus on the effects of camera movement. The results show that depth perception considering camera motion depends much more on the content of the volume than on the chosen visualization technique. Furthermore, we found that conventional non-photorealistic rendering techniques, which have often performed poorly in previous studies, showed comparable performance to modern photorealistic techniques in our study. The source code for the visualization system, survey, and analysis, as well as the data set used in the study and the participants’ responses, have been made publicly available.

• Language: English
• Keywords: volume rendering, crowded volumes, depth perception, user study
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FRI - Faculty of Computer and Information Science
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 10 str.
• Numbering: Vol. 120, art. 103918
• PID: 20.500.12556/RUL-155805
• UDC: 004.92
• ISSN on article: 0097-8493
• DOI: 10.1016/j.cag.2024.103918
• COBISS.SI-ID: 192959491
• Publication date in RUL: 19.04.2024

Record is a part of a journal

• Title: Computers & graphics
• Shortened title: Comput. graph.
• Publisher: Elsevier
• ISSN: 0097-8493
• COBISS.SI-ID: 25264384

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: upodabljanje volumnov, gosto poseljeni volumni, globinska zaznava, uporabniška študija