Estimation of light source colours for light pollution assessment.

The concept of the smart city raised several technological and scientific issues including light pollution. There are various negative impacts of light pollution on economy, ecology, and heath. This paper deals with the census of the colour of light emitted by lamps used in a city environment. To this end, we derive a light bulb colour estimator based on Bayesian reasoning, directional data, and image formation model in which the usual concept of reflectance is not used. All choices we made are devoted to designing an algorithm which can be run almost in real-time. Experimental results show the effectiveness of the proposed approach.

[1]  Inderjit S. Dhillon,et al.  Clustering on the Unit Hypersphere using von Mises-Fisher Distributions , 2005, J. Mach. Learn. Res..

[2]  Steven D. Hordley,et al.  Scene illuminant estimation: Past, present, and future , 2006 .

[3]  Steven A. Shafer,et al.  Using color to separate reflection components , 1985 .

[4]  Vincenzo Lagani,et al.  Performance-Estimation Properties of Cross-Validation-Based Protocols with Simultaneous Hyper-Parameter Optimization , 2015, Int. J. Artif. Intell. Tools.

[5]  Christopher D. Elvidge,et al.  Spectral Identification of Lighting Type and Character , 2010, Sensors.

[6]  Joost van de Weijer,et al.  Author Manuscript, Published in "ieee Transactions on Image Processing Edge-based Color Constancy , 2022 .

[7]  Nizar Bouguila,et al.  Beyond hybrid generative discriminative learning: spherical data classification , 2013, Pattern Analysis and Applications.

[8]  Fred A. Kruse,et al.  Identifying and mapping night lights using imaging spectrometry , 2011, 2011 Aerospace Conference.

[9]  S. L. Shmakov.  A UNIVERSAL METHOD OF SOLVING QUARTIC EQUATIONS , 2011 .

[10]  Mark S. Drew,et al.  The Zeta-image, illuminant estimation, and specularity manipulation , 2014, Comput. Vis. Image Underst..

[11]  Mark S. Drew,et al.  The Role of Bright Pixels in Illumination Estimation , 2012, Color Imaging Conference.

[12]  Djemel Ziou,et al.  Computer Vision Color Constancy from Maximal Projections Mean Assumption , 2016, ICISP.

[13]  M. Hori,et al.  Lethal effects of short-wavelength visible light on insects , 2014, Scientific Reports.

[14]  Djemel Ziou,et al.  Ranked k-means clustering for terahertz image segmentation , 2015, 2015 IEEE International Conference on Image Processing (ICIP).

[15]  M. Kocifaj.  Light-pollution model for cloudy and cloudless night skies with ground-based light sources. , 2007, Applied optics.

[16]  M. Aube,et al.  Light pollution modelling and detection in a heterogeneous environment: toward a night-time aerosol optical depth retreival method , 2005, SPIE Optics + Photonics.

[17]  Suvrit Sra,et al.  A short note on parameter approximation for von Mises-Fisher distributions: and a fast implementation of Is(x) , 2012, Comput. Stat..

[18]  Tony Flanders.  Measuring Skyglow with Digital Cameras , 2006 .

[19]  Yiming Yang,et al.  Von Mises-Fisher Clustering Models , 2014, ICML.

[20]  M. Kocifaj.  Light pollution simulations for planar ground-based light sources. , 2008, Applied optics.

[21]  Graham D. Finlayson,et al.  Shades of Gray and Colour Constancy , 2004, CIC.

[22]  Luca Pipia,et al.  Ground-based hyperspectral analysis of the urban nightscape , 2017 .

[23]  C. Elvidge,et al.  Limiting the impact of light pollution on human health, environment and stellar visibility. , 2011, Journal of environmental management.

[24]  Javier Toro,et al.  Illumination Estimation from Dichromatic Planes , 2005, Color Imaging Conference.