An Introduction to Aliasing and Sharpening in Digital Motion Picture Systems
Many interacting factors affect image quality. This paper discusses the measurement of some crucial factors and reviews their interactions. Specifically, how pixel count can interact with the image-quality factors of limiting resolution, aliasing ratio, and shape of frequency response. A new tool designed for onscreen image-quality measurements for both film and electronic projectors is described, and actual examples of aliasing artifacts are shown in still images from digital motion picture systems. It is then illustrated how aliasing artifacts can arise, although Nyquist sampling requirements are satisfied. Finally, some of the interactions between limiting resolution and frequency response shape for still and moving images are explained.
- Print ISSN
- 1545-0279
- Electronic ISSN
- 2160-2492
- Published
- 2003-05
- Content type
- Original Research
- DOI
- 10.5594/J12379