Stimuli were generated in MATLAB (The MathWorks, Natick, MA, USA) using the Psychophysics Toolbox (Brainard, 1997 (link); Kleiner, Brainard, & Pelli, 2007 ; Pelli, 1997 (link)) and displayed on a CRT monitor (Sony Triniton, Sony Electronics, New York, NY) with a mean luminance of 53 cd/m2 and chromaticity xy = [0.29, 0.30]. Observers viewed the screen from a distance of 80 cm, at which it subtended 22 × 27 degrees of visual angle. A Bits# visual stimulus generator (Cambridge Research Systems, Kent, UK) was used to control the amplitude of each color channel with 14-bit precision. Nonlinearity in the output of each color channel was characterized using a SpectroCAL spectroradiometer (Cambridge Research Systems) and corrected in software. The measured emission spectra of the monitor phosphors were integrated with psychophysically derived cone fundamentals (Smith & Pokorny, 1975 (link)) to create a linear transformation specifying the RGB values required to elicit any target triplet of cone excitation levels.
Bits visual stimulus generator
Manufactured by Cambridge Research Systems
Sourced in United Kingdom
The Bits# visual stimulus generator is a laboratory equipment designed for the controlled presentation of visual stimuli. It provides precise control over the timing and characteristics of visual stimuli, enabling researchers to conduct experiments in visual perception and neuroscience.
Automatically generated - may contain errors
2 protocols using bits visual stimulus generator
1
Color Calibration and Stimulus Generation
2
Precise Calibration of Visual Stimuli
Check if the same lab product or an alternative is used in the 5 most similar protocols
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Stimuli were generated in MATLAB (The MathWorks, Natick, MA, USA) using the Psychophysics Toolbox (Brainard, 1997 (link); Kleiner, Brainard, & Pelli, 2007 ; Pelli & Vision, 1997 (link)) and displayed on a CRT monitor (DiamondPro 2070; Mitsubishi Electric Corporation, Tokyo, Japan) with a mean luminance of 50 cd/m2 and chromaticity xy = {0.31, 0.33}. Observers viewed the screen from a distance of 80 cm, at which it subtended 22° × 27° of visual angle. A Bits# visual stimulus generator (Cambridge Research Systems, Kent, UK) was used to control the amplitude of each color channel with 14-bit precision. Nonlinearity in the output of each color channel was characterized using a SpectroCAL spectroradiometer (Cambridge Research Systems) and corrected in software. The measured emission spectra of the monitor phosphors were integrated with psychophysically derived cone fundamentals (Smith & Pokorny, 1975 (link)) to create a linear transformation specifying the RGB values required to elicit any target triplet of cone excitation levels.
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