title: Human speckle perception threshold for still images from a laser projection system.
abstract: 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.
authors.forename: Stijn
authors.initials: S
authors.lastname: Roelandt
authors.forename: Youri
authors.initials: Y
authors.lastname: Meuret
authors.forename: An
authors.initials: A
authors.lastname: Jacobs
authors.forename: Koen
authors.initials: K
authors.lastname: Willaert
authors.forename: Peter
authors.initials: P
authors.lastname: Janssens
authors.forename: Hugo
authors.initials: H
authors.lastname: Thienpont
authors.forename: Guy
authors.initials: G
authors.lastname: Verschaffelt
mesh_terms: D000465:Algorithms; D002560:Cerebrovascular Circulation; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D007834:Lasers; D008297:Male