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The Antialiasing Problem in Ray Tracing - mentallandscape.com
http://mentallandscape.com/Papers_siggraph90tutorial.pdf
1. Aliasing Ray tracing is one of the most general and powerful techniques for synthesizing realistic images. Unfortu-nately, this method suffers from a notoriously difficult problem with aliasing. This survey will consider why the problem is hard, several classes of solutions, and some of the issues that require further study.
Anti-aliased and accelerated ray tracing
https://www.cs.utexas.edu/users/fussell/courses/cs384g-fall2011/lectures/lecture10-Aa_and_accel_raytracing.pdf
Antialiasing in a ray tracer We would like to compute the average intensity in the neighborhood of each pixel. When casting one ray per pixel, we are likely to have aliasing artifacts. To improve matters, we can cast more than one ray per pixel and average the result. A.k.a., super-sampling and averaging down.
12. Anti-aliasingand Distribution Ray Tracing
https://courses.cs.washington.edu/courses/csep557/01sp/lectures/aa-and-drt.pdf
Anti-aliasingand Distribution Ray Tracing 2 Reading Required: Watt, sections 12.1-12.5.1. Further reading: Watt, chapter 14. A.Glassner. An Introduction to Ray Tracing. Academic Press, 1989. [In the lab.] 3 Aliasing Ray tracing is a form of sampling and can suffer from annoying visual artifacts... Consider a continuous function ƒ(x). Now sample it
raytracing - How is Anti Aliasing Implemented in Ray Tracing ...
https://computergraphics.stackexchange.com/questions/4248/how-is-anti-aliasing-implemented-in-ray-tracing
You could even do temporal anti aliasing in ray tracing for instance. Julien expanded on Raxvan's 2nd item which was an explanation of super sampling, and showed how you'd actually do that, also mentioning that you can randomize the location of the samples within the pixel but then you are entering signal processing country which is a lot ...
raytracing - Anti-aliasing / Filtering in Ray Tracing - Computer ...
https://computergraphics.stackexchange.com/questions/2130/anti-aliasing-filtering-in-ray-tracing
In ray tracing / path tracing, one of the simplest way to anti-alias the image is to supersample the pixel values and average the results. IE. instead of shooting every sample through the center of the pixel, you offset the samples by some amount. In searching around the internet, I've found two somewhat different methods to do this:
Anti-aliasing and Monte Carlo Path Tracing
https://courses.cs.washington.edu/courses/cse557/17au/assets/lectures/aa-and-mcpt-1pp.pdf
Antialiasing in a ray tracer We would like to compute the average intensity in the neighborhood of each pixel. When casting one ray per pixel, we are likely to have aliasing artifacts. To improve matters, we can cast more than one ray per pixel and average the result. A.k.a., super-sampling and averaging down. 7 Antialiasing by adaptive sampling
Aliasing - Stanford Computer Science
https://cs.stanford.edu/people/eroberts/courses/soco/projects/1997-98/ray-tracing/aliasing.html
The effect of missing an object because it "falls between" two rays is called . Anti Aliasing In order to solve the fundamental problem of representing continuous objects in discrete systems, a variety of anti-aliasing techniques have evolved. The following techniques are all methods for combating spatial aliasing. Supersampling
Simple Ray Tracing in C# Part IV (Anti-Aliasing)
https://www.codeproject.com/Articles/19981/Simple-Ray-Tracing-in-C-Part-IV-Anti-Aliasing
Anti-aliasing is the name for techniques designed to reduce or eliminate the jagged effect of square pixels attempting to approximate curved shapes. Aliased curve. Here we focus on shading the pixels using an averaging algorithm, adding anti-aliasing to our basic ray tracing. For this, instead of only one ray per pixel, we will fire 4 extra rays around each pixel, …
RayTracing: Aliasing Vs Antialiasing – Graphic PIZiadas
https://piziadas.com/en/2010/02/raytracing-aliasing-vs-antialiasing.html
RayTracing: Aliasing Vs Antialiasing. Tour theoretical line on screen. To generate a synthetic image, such as those used in films as Avatar, can produce unwanted effects or "artifacts" that impoverish the image. One such effect is called " Aliasing ”. Aliasing occurs mainly in lines and edges of straight lines, having a shape "sawtooth" that ...
Anti-Aliasing - Computer Graphics
https://graphics.fandom.com/wiki/Anti-Aliasing
In digital signal processing, anti-aliasing is the technique of minimizing aliasing (jagged or blocky patterns) when representing a high-resolution signal at a lower resolution. In most cases, anti-aliasing means removing data at too high a frequency to represent. When sampling is performed without removing this part of the signal, it causes undesirable artifacts such as the black-and …
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