Guaranteed Adaptive Antialiasing Using Interval Arithmetic
Interval arithmetic has been used to create guaranteed intersection tests in the ray tracing algorithms. Although those algorithms improve the reliability in the visualization of implicit surfaces, they do not provide an alternative to avoid point sampling inside the pixel. In this paper, we develop an interval adaptive antialiasing algorithm (IAA) by means of the study of the coherence of sets of rays crossing a pixel (instead of individual rays) in order to detect variations over the hit surface. This method allows us to obtain better visualizations than the traditional interval ray tracing algorithms.
KeywordsComputer Graphic Intersection Test Interval Arithmetic Adaptive Sampling Implicit Surface
- 4.Genetti, J., Gordon, D.: Ray Tracing With Adaptive Supersampling in Object Space. Graphics Interface, 70–77 (1993)Google Scholar
- 7.Mitchell, D.: Robust ray intersection with interval arithmetic. In: Proceedings on Graphics interface ’90, pp. 68–74 (1990)Google Scholar
- 8.Sanjuan-Estrada, J., Casado, L., García, I.: Reliable Algorithms for Ray Intersection in Computer Graphics Based on Interval Arithmetic. In: XVI Brazilian Symposium on Computer Graphics and Image Processing, pp. 35–44 (2003)Google Scholar