Michael J. Murdoch
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View article: Perceived Colorfulness of High‐Brightness Color Stimuli
Perceived Colorfulness of High‐Brightness Color Stimuli Open
Perceived colorfulness (or color saturation) of a new high‐brightness color stimuli dataset was measured in a psychophysical scaling experiment. Stimuli created with a 7‐primary LED system covered a broad range of luminance from 50 to 2000…
View article: Understanding Color Associations and Their Effects on Expectations of Drugs’ Efficacies
Understanding Color Associations and Their Effects on Expectations of Drugs’ Efficacies Open
Colors influence our daily perceptions and expectations that manifest in a variety of ways. This research has three main objectives: to demonstrate the relationship between the colors of pills and their expected efficacies, to test this ef…
View article: Improved Method for Evaluating and Specifying the Chromaticity of Light Sources
Improved Method for Evaluating and Specifying the Chromaticity of Light Sources Open
This article describes a method for calculating and specifying light source chromaticity using the International Commission on Illumination (CIE) 2015 10° color matching functions (CMFs), which, according to analysis of existing psychophys…
View article: Improved Method for Evaluating and Specifying the Chromaticity of Light Sources
Improved Method for Evaluating and Specifying the Chromaticity of Light Sources Open
This article describes a method for calculating and specifying light source chromaticity using the International Commission on Illumination (CIE) 2015 10° color matching functions (CMFs), which, according to analysis of existing psychophys…
View article: Effect of color gamut and luminance on observer metamerism in HDR displays
Effect of color gamut and luminance on observer metamerism in HDR displays Open
Observer metamerism (OM) is one of the potential issues in HDR displays because of the required wide color gamuts and high peak luminance levels. A simulation was performed using hypothetical displays to investigate how OM in HDR displays …
View article: Observer metamerism: Why do [mis]matches of neutral appear pinkish or greenish?
Observer metamerism: Why do [mis]matches of neutral appear pinkish or greenish? Open
White lighting and neutral-appearing objects are essential in numerous color applications. In particular, setting or tuning a reference white point is a key procedure in both camera and display applications. Various studies on observer met…
View article: Color and Object Appearance in Augmented Reality
Color and Object Appearance in Augmented Reality Open
This presentation will summarize recent work on the visual perception of color appearance and object properties in optical see-through (OST) augmented reality (AR) systems. OST systems, such as Microsoft HoloLens, use a see- through displa…
View article: Time course of chromatic adaptation under dynamic lighting
Time course of chromatic adaptation under dynamic lighting Open
Chromatic adaptation is an extensively studied concept. However, less is known about the time course of chromatic adaptation under gradually-changing lighting. Two experiments were carried out to quantify the time course of chromatic adapt…
View article: Perceived speed of changing color in chroma and hue directions in CIELAB
Perceived speed of changing color in chroma and hue directions in CIELAB Open
In dynamic LED lighting, the perceived speed of changing color is an important concept; however, there exists no suitable temporal color space. In a psychophysical experiment, we compared the perceived speed of periodic temporal transition…
View article: Characterization and control of a multi-primary LED light lab
Characterization and control of a multi-primary LED light lab Open
A new light lab facility has been commissioned at Rochester Institute of Technology with the research goal of studying human visual adaptation under temporally dynamic lighting. The lab uses five-channel LED luminaires with 16 bits of addr…