In common usage, an image (from Latin imago) or picture is an artifact that reproduces the likeness of some subject—usually a physical object or a person.
Images may be two dimensional, such as a photograph, or three dimensional such as in a statue. They are typically produced by optical devices—such as a cameras, mirrors, lenses, telescopes, microscopes, etc. and natural objects and phenomena, such as the human eye or water surfaces.
The word image is also used in the broader sense of any two-dimensional figure or illustration, such as a map, a graph, a pie chart, or an abstract painting. In this wider sense, images can also be produced manually, such as by drawing, painting, carving, by computer graphics technology, or a combination of the two, especially in a pseudo-photograph.
More on [ Image ]

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CMU Computer Vision Images - List of sites (intended for computer vision use) from CMU.
Image Processing: the Lena Story - The history of one of the most well-known test images: Lena Sjooblom.
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The Japanese Female Facial Expression Image Database - Database of facial expression images freely available for research purposes.
Meta Description: [ Japanese Female Facial Expression
Database ]
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The Lenna Story - Information about Lena Soderberg (née Sjööblom) and the history of the famous test image.
The Visible Human - The Visible Human Project has many medical images.
Meta Description: [ The Visible Human Project is the creation of anatomically detailed, three-dimensional representations of normal male and female human bodies. Transverse CT, MR and cryosection images have been collected. ]
USC-SIPI Image Database - A collection of digitised images in TIFF format. Catalogue in PDF. Previews and images free on-line, database on magnetic tape can be purchased.
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