Information extraction from shadowed regions in images: an eye movement study

Hermens, Frouke and Zdravković, Sunčica (2015) Information extraction from shadowed regions in images: an eye movement study. Vision Research, 113 (Pt A). pp. 87-96. ISSN 0042-6989

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Item Type:Article
Item Status:Live Archive

Abstract

Natural scenes often contain variations in local luminance as a result of cast shadows and illumination from different directions. When making judgments about such scenes, it may be hypothesized that darker regions (with lower relative contrast due to a lack of illumination) are avoided as they may provide less detailed information than well-illuminated areas. We here test this hypothesis, first by presenting participants images of faces that were digitally modified to simulate the effect of a shadow over half of the image, and second by presenting photographs of faces taken with side illumination, also resulting in the appearance of a shadow across half of the face. While participants viewed these images, they were asked to perform different tasks on the images, to allow for the presentation of the different versions of each image (left shadow, right shadow, no shadow), and to distract the observers from the contrast and illumination manipulations. The results confirm our hypothesis and demonstrate that observers fixate the better illuminated regions of the images.

Keywords:eye movements, bmjgoldcheck
Subjects:C Biological Sciences > C830 Experimental Psychology
Divisions:College of Social Science > School of Psychology
ID Code:17856
Deposited On:13 Jul 2015 16:01

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