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Anti-aliasing in image recording and display hardware: lessons from nature

In English

Författare

Summary, in English

If images are undersampled during electronic recording and reproduction, regular patterns in the image may form interference patterns-aliases-with the mosaic of picture elements (pixels). Aliasing distorts visual information and is a serious technical problem. In a variety of animal eyes, images are also undersampled such that aliasing may occur. Nature's measures to reduce aliasing include (i) mosaics of photosensitive cells (pixels in technical applications) that include many spatial frequencies and are different in geometry for the basic colours red, green, and blue, (ii) electrical coupling between cells of different spectral sensitivities, and (iii) overlap between the spectral sensitivities of different cell types. Computer simulated renderings of images show that the measures are effective. Technical implementation seems to be possible in a variety of applications, such as cameras, television sets, scanners, monitors, data projectors, and digital photocopying machines.

Publiceringsår

2004

Språk

Engelska

Sidor

743-748

Publikation/Tidskrift/Serie

Journal of Optics. A, Pure and Applied Optics

Volym

6

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

IOP Publishing

Ämne

  • Zoology

Nyckelord

  • fish retina
  • pixel mosaic
  • aliasing
  • image recording
  • image reproduction

Status

Published

Forskningsgrupp

  • Lund Vision Group

ISBN/ISSN/Övrigt

  • ISSN: 1741-3567