Cogent Graphics

Cogent Graphics is a graphics toolbox for MATLAB on the PC. You can use Cogent Graphics to generate real-time graphical animations for use as stimuli in visual experiments. Cogent Graphics provides commands for generating animations with millisecond accuracy at refresh rates up to 160Hz as well as mouse and keyboard support for user input.

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Demonstrations

Here you can view some movie files of animations created using Cogent Graphics. Please note that the movies are of lower quality than the original Cogent Graphics animations which run full screen with no jerkiness. The movie clips run only five seconds before repeating but the original animations run indefinitely. Click on the small image to view the movie. Be warned that the movie files are quite large (up to 2Mb) and may take some time to download.

Simple animation

A simple animation

Matlab source code for this animation

Bouncing balls

Bouncing coloured balls

Spinning dartboards

Three spinning, bouncing dartboards

Scrolling check pattern

A scrolling check pattern

Starfield

A full colour star field

Latest news

  • Coming soon: Parallel processing in the brain's visual form system: An fMRI study by Yoshihito Shigihara and Semir Zeki will soon be published in Frontiers in Human Neuroscience
  • Coming soon: Masking reveals parallel form systems in the visual brain by Yu Tung Lo and Semir Zeki will soon be published in Frontiers in Human Neuroscience
  • Coming soon: The role of parietal cortex in the formation of colour and motion based concepts by Samuel W. Cheadle and Semir Zeki will soon be published Frontiers in Human Neuroscience
  • Now available: Semir Zeki's first book, A Vision of the Brain, can be downloaded here.
  • Upcoming lecture 15-16/11/14 Warsaw (exact timing to be announced): A talk at the "Aspects of Neuroscience" conference
  • Upcoming lecture 05-06/12/14 Heidelberg (exact timing to be announced): Keynote address at the Helmholtz Foundation, Heidelberg University
  • Now available: Perceptual asynchrony for motion by Yu Tung Lo and Semir Zeki in Frontiers in Human Neuroscience.
  • Now available: Varieties of perceptual instability and their neural correlates by Tomohiro Ishizu and Semir Zeki in Neuroimage.
  • Now available: The experience of mathematical beauty and its neural correlates by Semir Zeki, John Romaya, Dionigi Benincasa and Sir Michael Atiyah in Frontiers in Human Neuroscience.
  • Now available: The "Visual Shock" of Francis Bacon: an essay in neuroesthetics by Semir Zeki and Tomohiro Ishizu in Frontiers in Human Neuroscience.
  • Now available: Clive Bell's "Significant Form" and the neurobiology of aesthetics by Semir Zeki is now available under open access in Frontiers in Human Neuroscience.
  • Now available: The brain's specialized systems for aesthetic and perceptual judgments by Semir Zeki and Tomohiro Ishizu is now available under open access in the European Journal of Neuroscience.
  • Now available: Parallelism in the brain's visual form system by Semir Zeki and Yoshihito Shigihara is now available in the European Journal of Neuroscience.
  • Now available: Splendors and Miseries of the Brain is now available in Greek.