Continuous Measurements of Eyeball Area and Their Spectrum Analyses -- Toward the Quantification of Rest Rhythm of Horses by Image Processing
Abstract
The motion of eyelids and eyeballs in domestic animals had been recognized well agreement with the sleep depth estimated by spectrum analyses of electroencephalogram at half closed eye and fully closed eye. This study aimed at quantitative estimating rest rhythm of horses by the analyses of eyeball movement. The mask attached with a miniature CCD camera was newly developed. The continuous images of the horse eye for about 24 hours were transmitted by telemetry system and were recorded to a time-lapse video recorder. The continuous images were captured hard disc (rate 1 frame 1 2 sec), the time information was obtained by OCR technology, the eyeball area was smoothed to average gray values, and done threshold for segmentation. The eyeball area was obtained via image processing and analyzed the spectrum. The temporal trend, the histogram and the spectrum of eyeball area were calculated. As for the results, the fluctuating status of eyeball area was analyzed quantitatively, and the rest rhythm of horses was clearly observed. It is possible to apply this technology to other animals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 25, 2001
- Accession Number
- ADA412117
Entities
People
- T. Kobayashi
- T. Ohnishi
- Toshie Saito
- Wei Chen
- Y. Honda