angel: interactive computer graphics 4e © addison-wesley 2005 sampling and aliasing ed angel...
Post on 22-Dec-2015
217 views
TRANSCRIPT
![Page 1: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/1.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
Sampling and Aliasing
Ed Angel
Professor of Computer Science, Electrical and Computer
Engineering, and Media Arts
Director, Arts Technology Center
University of New Mexico
![Page 2: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/2.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
Introduction
• In computer graphics, we use the term “aliasing” but where does it come from?
• Sampling theory explains where these errors arise and what we might do to avoid them
• Explains both digitization and display
![Page 3: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/3.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
Sampling Process
• Measure f(x,y) on grid
![Page 4: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/4.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 5: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/5.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 6: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/6.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 7: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/7.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 8: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/8.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 9: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/9.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 10: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/10.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 11: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/11.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 12: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/12.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 13: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/13.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 14: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/14.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 15: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/15.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 16: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/16.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 17: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/17.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 18: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/18.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005
![Page 19: Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005 Sampling and Aliasing Ed Angel Professor of Computer Science, Electrical and Computer Engineering,](https://reader030.vdocuments.net/reader030/viewer/2022032523/56649d765503460f94a57fcb/html5/thumbnails/19.jpg)
Angel: Interactive Computer Graphics 4E © Addison-Wesley 2005