Black rooms seen through a veiling luminance: gradient amplitude vs highest luminance

The effects of eccentricity and retinal illuminance on the illusory motion seen in a stationary luminance gradient

Kitaoka recently reported a novel illusion named the Rotating Snakes [Kitaoka, A., & Ashida, H. (2003). Phenomenal characteristics of the peripheral drift illusion. Vision, 15, 261-262], in which a stationary pattern appears to rotate constantly. In the first experiment, we attempted to quantify the anecdote that this illusion is better perceived in the periphery. The stimulus was a ring compos...

Linear Tuning of Gamma Amplitude and Frequency to Luminance Contrast: Evidence from a Continuous Mapping Paradigm

Individual differences in the visual gamma (30-100 Hz) response and their potential as trait markers of underlying physiology (particularly related to GABAergic inhibition) have become a matter of increasing interest in recent years. There is growing evidence, however, that properties of the gamma response (e.g., its amplitude and frequency) are highly stimulus dependent, and that individual di...

Foreground segmentation using luminance contrast

The authors suggest the convenience of using luminance contrast for a normalised threshold in the foreground segmentation process for video-based surveillance applications. An individual pixel is part of the foreground when its contrast is greater than a given threshold. This method presents two major advantages: it simplifies the background model and increases the processing speed. The backgro...

Luminance Metrics for Roadway Lighting

Automatic spatial association for luminance.

In the present study, we investigated whether luminance and the side of response execution are associated, showing a SNARC-like effect (faster responses with the left hand for dark stimuli, and vice versa for light stimuli). A total of 30 participants were tested in two experiments. In Experiment 1, the association between space and the luminance of chromatic stimuli was directly tested (bright...