Péter Bodrogi
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View article: Numerical correlation between non-visual metrics and brightness metrics—implications for the evaluation of indoor white lighting systems in the photopic range
Numerical correlation between non-visual metrics and brightness metrics—implications for the evaluation of indoor white lighting systems in the photopic range Open
View article: Brightness perception under photopic conditions: experiments and modeling with contributions of S-cone and ipRGC
Brightness perception under photopic conditions: experiments and modeling with contributions of S-cone and ipRGC Open
View article: Numerical Relationship Between Non‐visual Metrics and Brightness Metrics – Consequences for the Evaluation of <scp>HCL</scp> Systems and Facilities
Numerical Relationship Between Non‐visual Metrics and Brightness Metrics – Consequences for the Evaluation of <span>HCL</span> Systems and Facilities Open
Since 2005, intensive research activities and discussions have taken place to explore and work out the mechanisms of how the receptor signals can be combined to give rise to the non-visual effects of light. Parallel to the dynamic and inte…
View article: Modern Aspects of Brightness and Visual Clarity in the Context of Light Quality and Visual Performance
Modern Aspects of Brightness and Visual Clarity in the Context of Light Quality and Visual Performance Open
The development of lighting technology started at the beginning of the twentieth century in the era of industrialisation and electrification and was intended to provide indoor workplaces with light around the clock, thereby minimising acci…
View article: Visual Performance–Work Performance
Visual Performance–Work Performance Open
In this chapter, the two most important parameters, illuminance and luminance distribution, and their relationship to visual performance and work performance are presented. Visual performance has been interpreted in the lighting literature…
View article: Introduction and Motivations
Introduction and Motivations Open
From the end of the nineteenth century until around the 1980s, some parts of the world experienced a steadily growing development of the industrialisation process, so that research in lighting technology concentrated on formulating the req…
View article: Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (mEDI) in the Context of Smart and Integrative Lighting
Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (mEDI) in the Context of Smart and Integrative Lighting Open
In the context of intelligent and integrative lighting, in addition to the need for color quality and brightness, the non-visual effect is essential. This refers to the retinal ganglion cells (ipRGCs) and their function, which were first p…
View article: Numerical Relationship Between Non-visual Metrics and Brightness Metrics - Implications for the Evaluation of Integrative Lighting Systems
Numerical Relationship Between Non-visual Metrics and Brightness Metrics - Implications for the Evaluation of Integrative Lighting Systems Open
From the beginning of the 21st century until today, the demand for lighting systems includes not only visual parameters (brightness, contrast perception, color quality), but also non-visual parameters. It is necessary to define the new non…
View article: Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (Medi) In the Context of Smart and Integrative Lighting
Determination and Measurement of Melanopic Equivalent Daylight (D65) Illuminance (Medi) In the Context of Smart and Integrative Lighting Open
In the context of intelligent and integrative lighting, in addition to the need for color quality and brightness, the non-visual effect is essential. This refers to the retinal ganglion cells (ipRGCs) and their function, first proposed in …
View article: Brightness perception under photopic conditions - experiments and modeling with contributions of S-cone and ipRGC
Brightness perception under photopic conditions - experiments and modeling with contributions of S-cone and ipRGC Open
In 1931, the CIE published and standardised the photopic luminous efficiency function. Based on these standardized curves,luminous flux in lumens, luminance in cd/m2, and illuminance in lux are determined by an integral of these curves and…
View article: SEMANTIC INTERPRETATION OF THE CIE 2017 COLOUR FIDELITY INDEX
SEMANTIC INTERPRETATION OF THE CIE 2017 COLOUR FIDELITY INDEX Open
The CIE 2017 Colour Fidelity Index (Rf) was defined as a scientifically accurate measure of colour fidelity with respect to a reference illuminant.The present paper deals with the interpretation of the different Rf values on its numeric sc…
View article: COLOUR PREFERENCE IS DEPENDENT ON COLOUR TEMPERATURE, CHROMA AND ILLUMINANCE LEVELS - EXPERIMENTS AND ANALYSIS
COLOUR PREFERENCE IS DEPENDENT ON COLOUR TEMPERATURE, CHROMA AND ILLUMINANCE LEVELS - EXPERIMENTS AND ANALYSIS Open
Colour fidelity (CF) was studied by comparing between test and reference light sources (LSs) based on colour differences.Colour saturation (CS) was discussed with Colour Gamut or Chroma Difference.Colour preference (CP) played the middle r…
View article: Towards a user preference model for interior lighting. Part 2: Experimental results and modelling
Towards a user preference model for interior lighting. Part 2: Experimental results and modelling Open
Subjects assessed their visual impressions about scene brightness, visual clarity, colour preference and scene preference in a real room in which the horizontal illuminance, the correlated colour temperature and the level of chroma enhance…
View article: Towards a user preference model for interior lighting Part 1: Concept of the user preference model and experimental method
Towards a user preference model for interior lighting Part 1: Concept of the user preference model and experimental method Open
The objective and subjective factors influencing human-centric lighting design and their effect on the user of the lighting system are analysed with the aim of developing a user preference model. It is discussed how to apply this user pref…
View article: Preliminary measure for the characterization of the usefulness of light sources
Preliminary measure for the characterization of the usefulness of light sources Open
A preliminary usefulness metric is defined. The metric is intended to characterize the energy efficiency of light sources in a more comprehensive way than the luminous efficacy of a source by taking selected spectral aspects of human centr…
View article: Opinion: The usefulness of light sources in human centric lighting
Opinion: The usefulness of light sources in human centric lighting Open
View article: Front Matter
Front Matter Open
and Tristimulus Values 17 2.2.2 Chromaticity Diagram 19 2.2.3 Interobserver Variability of Color Vision 20 2.2.4 Important Concepts Related to the Chromaticity Diagram 21 2.2.5 MacAdam Ellipses and the u ′ -v ′ Chromaticity Diagram 24 2.3 …
View article: Index
Index Open
Optimization of the light sources by means of correct color quality metrics Color objects, color samples, Their arrangement The viewing condition Adaptation condition Human eye and the cognitive color image processing Brightness, lightness…
View article: Memory Colors Part I: Comparison of Chinese and German Observers
Memory Colors Part I: Comparison of Chinese and German Observers Open
A deep understanding of how humans assess memory colors is extremely important for various lighting and imaging applications, such as color and image reproduction as well as image enhancement (e.g., in film and TV-studios, in professional …