Skip to main content

A Non-geographical Application of Spatial Information Systems in Pupillometry

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Abstract

Spatial analysis and spatial information systems have great potential in many non-geographic domains. This paper presents an example of the utility of spatial analysis in a non-geographic domain. A technique of pupillometry using digital infrared video loosely coupled with a Spatial Information System and a spreadsheet is developed to accurately quantify pupil dilation magnitude and constriction onset latency for participants of different cognitive ability and under different cognitive loads. Spatio-temporal pupil dynamics of participants are recorded using digital infrared video. The pupil to iris area ratio is calculated for over 470,000 temporally sequenced de-interlaced video fields by automatic feature extraction using a combination of threshold analysis, spatial smoothing and areal filtering. Pupil dilation magnitudes and constriction onset latencies are calculated through post-processing in a spreadsheet. The study identifies inadequacies in current spatial analytical techniques for automatic feature extraction not necessarily evident in geographic applications. Issues impeding the employment of spatial analysis in non-geographic domains including the lack of a generic spatial referencing system are identified and discussed.

Document Type: Research Article

DOI: https://doi.org/10.1111/1467-9671.00160

Affiliations: 1: GISCA – The National Centre for Social Applications of GIS University of Adelaide 2: Department of Psychology University of Adelaide

Publication date: 2003-03-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more