scholarly journals tACS phase-specifically biases brightness perception of flickering light

2022 ◽  
Author(s):  
Marina Fiene ◽  
Jan-Ole Radecke ◽  
Jonas Misselhorn ◽  
Malte Sengelmann ◽  
Christoph S. Herrmann ◽  
...  
2020 ◽  
pp. 9-24
Author(s):  
Peter Bodrogi ◽  
Xue Guo ◽  
Tran Quoc Khanh

The brightness perception of a large (41°) uniform visual field was investigated in a visual psychophysical experiment. Subjects assessed the brightness of 20 light source spectra of different chromaticities at two luminance levels, Lv=267.6 cd/m2 and Lv=24.8 cd/m2. The resulting mean subjective brightness scale values were modelled by a combination of the signals of retinal mechanisms: S-cones, rods, intrinsically photosensitive retinal ganglion cells (ipRGCs) and the difference of the L-cone signal and the M-cone signal. A new quantity, “relative spectral blue content”, was also considered for modelling. This quantity was defined as “the spectral radiance of the light stimulus integrated with the range (380–520) nm, relative to luminance”. The “relative spectral blue content” model could describe the subjective brightness perception of the observers with reasonable accuracy.


2015 ◽  
Vol 99 (5) ◽  
pp. 258-262 ◽  
Author(s):  
Tasuku Watanuki ◽  
Hiroshi Takahashi ◽  
Takashi Irikura

2006 ◽  
pp. 23-46 ◽  
Author(s):  
Frederick A. A. Kingdom

Paragraph ◽  
2021 ◽  
Vol 44 (3) ◽  
pp. 379-393
Author(s):  
Marc Azéma

This article examines cave art in France, arguing that the images created at many sites, but particularly Chauvet, can be analysed in terms of animation, storytelling, lighting and sound. Through superimposition and juxtaposition, and using the contours of the rock face, Palaeolithic artists invented a form of narration based on images, often then animated by the flickering light of lamps and torches. Drawing on semiological work by Philippe Sohet and his terms ‘narrative image’ and ‘iconic narration’, the article sees panels of cave art as constituting scenes and actions that can be discussed in relation to both bande dessinée and cinema. Finally, evidence suggests that the spectacles produced in these spaces, whatever their elusive meaning, also depended on sound and acoustics.


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