Measuring the Perception of Light Inconsistencies

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Jorge Lopez-Moreno, Veronica Sundstedt, Francisco Sangorrin, Diego Gutierrez
Title: Measuring the Perception of Light Inconsistencies
Conference name: Applied Perception in Graphics and Visualisation
Year: 2010
Publisher: ACM
City: Los Angeles
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/com
Authors e-mail: veronica.sundstedt@bth.se
Language: English
Abstract: In this paper we explore the ability of the human visual system to detect inconsistencies in the illumination of objects in images. We specifically focus on objects being lit from different angles as the rest of the image. We present the results of three different tests, two with synthetic objects and a third one with digitally manipulated real images. Our results seem to agree with previous publications exploring the topic, but we extend them by providing quantifiable data which in turn suggest approximate perceptual thresholds.
Given that light detection in single images is an ill-posed problem, these thresholds can provide valid error limits to related algorithms in different contexts, such as compositing or augmented reality.
Subject: Computer Science\General
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