Accession Number : ADA019854

Title :   Effects of Alteration of Spatial Frequency Content of Complex Scenes on Human Visual Scan Patterns.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Capell,Carey M.

Report Date : DEC 1975

Pagination or Media Count : 75

Abstract : Eye-scan data are recorded by a (Honeywell) remote one cubic-foot oculometer from 12 human subjects given a free-viewing task when shown projected photographic slides; 180 computer plots are prepared from the recorded scanpath data. Stimulus slides include 20 complex outdoor scenes in ten categories according to subject content; low-pass and high-pass versions of these scenes prepared by a coherent optical (He-Ne laser) spatial filtering apparatus are included in the stimulus set. Photographic prints of the stimuli are digitized and computer programs written to analyze the relative spatial frequency content of small subsections of each print. Recommended analysis of eye-scan and spatial frequency data may provide an insight into the mechanisms used by the human visual system in scanning visual scenes.

Descriptors :   *Visual perception, Optical images, Bionics, Theses, Humans, Space perception, Pictures, Spatial filtering

Subject Categories : Anatomy and Physiology
      Optics
      Bionics

Distribution Statement : APPROVED FOR PUBLIC RELEASE