Role of Photon Statistics of Light Source in Ghost Imaging

2012 ◽  
Author(s):  
Kam Wai Clifford Chan
Keyword(s):  
Light Source ◽  
Photon Statistics ◽  
Ghost Imaging

Role of photon statistics of light source in ghost imaging

2012 ◽  
Vol 37 (13) ◽  
pp. 2739 ◽  
Author(s):  
Kam Wai Clifford Chan
Keyword(s):  
Light Source ◽  
Photon Statistics ◽  
Ghost Imaging

scholarly journals Colour Ambiguity in Real Scenes and the Role of Perceptual Organisation

2021 ◽  
Author(s):  
Annette Werner ◽  
Alisa Schmidt ◽  
Julian Hilmers ◽  
Lukas Boborzi ◽  
Manuela Weigold
Keyword(s):  
Light Source ◽  
Explicit Knowledge ◽  
Local Region ◽  
Light Blue ◽  
The Real ◽  
Quantitative Measurements ◽  
Real Scene ◽  
Neural Processes ◽  
High Level

AbstractIn this study we show a reproduction of the dress-ambiguity phenomenon in a real scene and we report quantitative measurements of the corresponding colour perceptions. The original, real dress, known from #thedress-illusion, was illuminated by combined short- and longwavelength broadband lights from two slide projectors. Test subjects viewing the dress reported to perceive the dress’ fabric and lace colours as blue & black, white & gold or light blue & brown; their corresponding perceptual matches were distributed along the blue/yellow cardinal axis, and exhibited a variability comparable to the ambiguity of the dress photograph. It is particularly noteworthy that the colour ambiguity emerged despite explicit knowledge of the observers about the direction of the light source. Manipulating the background of the real dress (change in chromaticity and luminance, or masking) revealed significant differences between the perceptual groups regarding lightness and colour of the dress. Our findings suggest that observer specific differences in the perceptual organisation of the visual scene are responsible for the colour ambiguity observed for the real dress; in particular, we conclude that colour computations of white & gold viewers focused onto the local region of the dress, whereas the colour processes of blue & black and light-blue & brown viewers were strongly influenced by contextual computations including the background. Our segmentation hypothesis extends existing explanations for the dress’ ambiguity and proposes image based (in the case of the real scene) and high level (in the case of the photograph) neural processes which control the spatial reach of contextual colour computations. The relation between the ambiguity in our real scene and the dress photograph is discussed.

Photon-statistics-based classical ghost imaging with one single detector

2016 ◽  
Vol 41 (12) ◽  
pp. 2863 ◽  
Author(s):  
Simone Kuhn ◽  
Sébastien Hartmann ◽  
Wolfgang Elsäßer
Keyword(s):  
Photon Statistics ◽  
Ghost Imaging ◽  
Single Detector

Designable light source for high quality ghost imaging

2021 ◽  
Author(s):  
Dongxu Zhou ◽  
Hongzhi Zhang ◽  
Lu Zhang ◽  
Guoquan Zhang
Keyword(s):  
Light Source ◽  
Ghost Imaging ◽  
High Quality

scholarly journals High-Visibility Pseudothermal Light Source Based on a Cr4+ : YAG Passively Q-Switched Single-Longitudinal-Mode Laser

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Can Cui ◽  
Yulei Wang ◽  
Zhiwei Lu ◽  
Zhenxu Bai ◽  
Hang Yuan ◽  
...  
Keyword(s):  
Light Source ◽  
Quantum Correlation ◽  
Peak Power ◽  
Laser System ◽  
Longitudinal Mode ◽  
High Peak Power ◽  
Ghost Imaging ◽  
Long Distance ◽  
Mode Laser ◽  
Quantum Correlation Function

High-visibility pseudothermal light source is required by the long-distance ghost imaging technology. In this article, the pulsed pseudothermal light based on a compact and Q-switched laser system with high peak power and intensity is reported. The passively Q-switched technique advances the performance of the pseudothermal light, where the second-order quantum correlation function g 2 value increased from 1.452 to 1.963.

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