Selective surface normal estimation for volume rendering. Issue 1 (2nd January 2017)

• Record Type: Journal Article
• Authors: Çelebi, Ömer Cengiz; Çevik, Ulus
• Is Part Of: Intelligent automation & soft computing. Volume 23:Issue 1(2017)
• Page Start: 95
• Page End: 102
• Publication Date: 2017-01-02
• Subjects: Volume rendering -- surface smoothing -- normal estimation -- staircase effect; Artificial intelligence -- Periodicals; Intelligent control systems -- Periodicals; 003.5
• DOI: 10.1080/10798587.2016.1139260
• Languages: English
• ISSNs: 1079-8587

Abstract

Abstract: Three-dimensional volumetric data is discrete by nature. It does not preserve continuous surface. Therefore, to render surfaces realistically, the normal vectors must be predicted before processing the image. During the rendering, if the normals are averaged directly, then the sharp edges are smoothed out as well. In this paper, we show how to avoid over-smoothing problems by analyzing a few neighbor voxels, and selectively averaging the normals to keep details, within a predefined kernel.