Image Quality in Sampled Data Systems

Abstract

The paper deals with aliasing, an important effect of one-and two- dimensional sampling on image quality. Aliasing changes the normal criteria of utility of the modulation transfer function (MTF) as a measure of system quality. Aliasing can be eliminated by letting the MTF fall to zero at one-half the sampling frequency. This, of course, markedly reduces the signal-to-noise ratio at the display (SNR(D)) near cutoff and thus reduces operator performance. Several factors control the amount of information an observer extracts from an image and the rate at which he extracts it. The paper presents the results of a series of experimental programs relating observer performance to the modulation transfer function area (MTFA) and to the SNR(D) and derives the relationship between MTFA and SNR(D). The paper discusses the tradeoffs as they are presently understood.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1971
Accession Number
AD0733663

Entities

People

  • A. Fenner Milton
  • Alvin D. Schnitzler
  • Frederick A. Rosell
  • Harry L. Snyder
  • Lucien M. Biberman
  • Otto H. Schade Sr.
  • Richard Legault

Organizations

  • Institute for Defense Analyses

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Amplifiers
  • Camera Tubes
  • Cameras
  • Detection
  • Detectors
  • Electron Multipliers
  • Frequency
  • Frequency Bands
  • Iconoscopes
  • Low Light Levels
  • Optics
  • Photographic Materials
  • Photographs
  • Photography
  • Transconductance
  • Two Dimensional
  • Waveforms

Readers

  • Computer Vision.
  • Marine Mammal Biology
  • Regression Analysis.