Open AccessHuman speckle perception threshold for still images from a laser projection system
Author(s) -
Stijn Roelandt,
Youri Meuret,
An Jacobs,
Koen Willaert,
Peter Janssens,
Hugo Thienpont,
Guy Verschaffelt
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.023965
Subject(s) - speckle pattern , speckle noise , projector , optics , speckle imaging , contrast (vision) , electronic speckle pattern interferometry , image quality , computer science , artificial intelligence , laser , computer vision , physics , image (mathematics)
We study the perception of speckle by human observers in a laser projector based on a 40 persons survey. The speckle contrast is first objectively measured making use of a well-defined speckle measurement method. We statistically analyse the results of the user quality scores, revealing that the speckle perception is not only influenced by the speckle contrast settings of the projector, but it is also strongly influenced by the type of image shown. Based on the survey, we derive a speckle contrast threshold for which speckle can be seen, and separately we investigate a speckle disturbance limit that is tolerated by the majority of test persons.