نتایج جستجو برای: flicker fusion

تعداد نتایج: 122204  

Journal: :Vision Research 2002
Stéphane J.M. Rainville Nicholas E. Scott-Samuel Walter L. Makous

The final stage of the Adelson-Bergen model [J. Opt. Soc. Am. A 2 (1985) 284] computes net motion as the difference between directionally opposite energies E(L) and E(R). However, Georgeson and Scott-Samuel [Vis. Res. 39 (1999) 4393] found that human direction discrimination is better described by motion contrast (C(m))--a metric where opponent energy (E(L)-E(R)) is divided by flicker energy (E...

Journal: :Investigative ophthalmology & visual science 2011
Thomas J Gin Chi D Luu Robyn H Guymer

PURPOSE To determine the retinal function in early age-related macular degeneration (AMD) assessed by the multifocal electroretinogram (mfERG) and flicker perimetry and to seek a relationship between local objective mfERG parameters and subjective flicker perimetry thresholds. METHODS mfERG and flicker perimetry were performed in 15 patients (15 eyes) with early AMD and 14 controls (14 eyes) ...

Journal: :IEEE transactions on visualization and computer graphics 2014
Manuela Waldner Mathieu Le Muzic Matthias Bernhard Werner Purgathofer Ivan Viola

Focus+context techniques provide visual guidance in visualizations by giving strong visual prominence to elements of interest while the context is suppressed. However, finding a visual feature to enhance for the focus to pop out from its context in a large dynamic scene, while leading to minimal visual deformation and subjective disturbance, is challenging. This paper proposes Attractive Flicke...

Journal: :The British journal of ophthalmology 1984
K R Alexander G A Fishman

We have assessed the influence of the rod system on cone flicker sensitivity during flicker perimetry. For temporal frequencies above 18 Hz extrafoveal cone-mediated flicker thresholds for a white test stimulus are as much as 1.5 log units lower when measured against a large background light that saturates the rods than when measured in darkness. Following a Ganzfeld bleach extrafoveal cone fli...

Journal: :The Journal of General Physiology 2003
Ernst Wolf

The bee's characteristic response to a movement of its visual field is used for the study of the relation between critical frequency of flicker and illumination. The critical flicker frequency varies with illumination in such a way that with increasing flicker frequency the intensity of illumination must be increased to produce a threshold response in the bee. The illuminations required to give...

2006
Jun Gao Jinsheng Tang Kemin Sheng

Zero-IF receiver has some advantages, such as small factor, low cost and easily integrated on a chip. They make it competitive of RF receivers. However, DC Offset and flicker noise, etc., have profound effects in zero-IF receiver, which need not be considered in super-heterodyne receiver. Following a major study of flicker noise, possible solutions are given, especially those based on the passi...

Journal: :Nihon Kansei Kogakkai ronbunshi 2023

Steady-state visual evoked potential (SSVEP)-brain-computer interface (BCI) has fast input speeds, high accuracy, and a large number of inputs. The problem with SSVEP is the stress caused by flickering stimuli risk developing photosensitivity. In this study, we attempted to reduce flicker high-frequency SSVEP-BCI. addition, measured critical fusion frequency (CFF) at which humans cannot perceiv...

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