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Project Information: About Viperlib

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All Areas of Viperlib:

Anatomy Physiology Lgn Miscellaneous Mt V5 Optics Retina V1 Visual Cortex

Attention & Learning Miscellaneous Multisensory Integration Perceptual Organisation Reading Visual Memory Visual Stm

Colour Colour Blindness Colour Constancy Colour Contrast Colour Illusions Miscellaneous

Depth Binocular Vision Depth Illusions Miscellaneous Rivalry Stereo

Development Miscellaneous

Faces Miscellaneous

Illusions Aftereffects Ambiguous Figures Contingent Aftereffects Geometrical Illusions Impossible Figures Miscellaneous Shape Illusions Size Illusions

Imaging Erg Fmri Miscellaneous Vep

Lightness Brightness Miscellaneous Shading

Miscellanous Miscellaneous

Motion Apparent Motion Biological Motion Eye Movements Heading Miscellaneous Optic Flow Perception And Action Plaids And Gratings Temporal Factors

Spatial Vision Contours Faces Miscellaneous Natural Scenes Object Recognition Orientation Space Perception Surfaces Texture

Video Links Illusions

Viper2go Tutorials Anatomy Physiology Aol Colour Depth Eye Movements Illusions Miscellaneous Motion Spatial Vision

Vision Scientists Miscellanous

Visual Abnormalities Colour Blindness Glaucoma Miscellaneous Neglect

Project Information: About Viperlib

Viperlib is a non-profit project directed by Peter Thompson and Rob Stone at the Department of Psychology, University of York, York YO10 5DD, UK. Viperlib is funded by the Higher Education Funding Council for England (HEFCE) and the Department for Employment and Learning (DEL) under the Fund for the Development of Teaching and Learning.

Viperlib is a web-based library of images and presentation material illuminating the study of visual perception. Viperlib is bringing together images, animations and graphs that will drop straight into presentations. Currently, images already in digitised form are scattered throughout a variety of academic websites and personal collections. Owners of material are being asked to donate copies of their images to Viperlib to create one central facility.

The material on this site has been given freely by the vision community, and users may download or print copies of the images without charge for non-profit educational or research purposes only.


We accept images in any format, and the range of formats available depends on material supplied by contributors. Formats may be changed or updated at any time by Viperlib.

Images will be associated with metadata added by Viperlib; for example, a brief description, keywords, file information, details of the creator or contributor and a link to a source of further information. All contributions will be acknowledged.

Links to other visual perception resources may be included.


Viperlib is not making any payment for images provided, and images are held only as a collection for use as an educational resource. Reproduction or distribution of items for commercial purposes is prohibited.

Viperlib does not own the copyright of any of the images on the website. Copyright in the images and materials resides with their respective owners.

Users are asked to acknowledge the copyright holders and their institutions when using their work.

Users are able to search or browse the site viewing images in thumbnail form. Users downloading the high-resolution version will have to agree to Viperlib’s terms and conditions of use.