Importance-Driven Volume Rendering

• Published in: 2004 IEEE Visualization Conference pp. 139 - 146
• Main Authors: Viola, Ivan, Kanitsar, Armin, Groller, Meister Eduard
• Format: Conference Proceeding
• Language: English
• Published: Washington, DC, USA IEEE Computer Society 10.10.2004; IEEE
• Series: ACM Conferences
• Subjects: Applied sciences; Artificial intelligence; Biomedical equipment; Computer graphics; Computer science; control theory; systems; Computing methodologies; Computing methodologies > Computer graphics; Computing methodologies > Computer graphics > Image manipulation; Computing methodologies > Computer graphics > Rendering; Data visualization; Exact sciences and technology; Focusing; Image generation; Lesions; Liver neoplasms; Medical services; Pattern recognition. Digital image processing. Computational geometry; Rendering (computer graphics); Shape; Occlusion; Image content; User interface; Image rendering; Tridimensional image; Visibility; Occultation
• ISBN: 0780387880; 9780780387881
• DOI: 10.1109/VISUAL.2004.48

This paper introduces importance-driven volume rendering as a novel technique for automatic focus and context display of volumetric data. Our technique is a generalization of cut-away views, which - depending on the viewpoint - remove or suppress less important parts of a scene to reveal more important underlying information. We automatize and apply this idea to volumetric data. Each part of the volumetric data is assigned an object importance which encodes visibility priority. This property determines which structures should be readily discernible and which structures are less important. In those image regions, where an object occludes more important structures it is displayed more sparsely than in those areas where no occlusion occurs. Thus the objects of interest are clearly visible. For each object several representations, i.e., levels of sparseness, are specified. The display of an individual object may incorporate different levels of sparseness. The goal is to emphasize important structures and to maximize the information content in the final image. This paper also discusses several possible schemes for level of sparseness specification and different ways how object importance can be composited to determine the final appearance of a particular object.