Rokeby Venus been cited as sources of inspiration for Velázquez. The nude Venuses of the Italian painters, such as Giorgione's "Sleeping Venus" (c. 1510) and Titian's "Venus of Urbino" (1538), were the main precedents. In this work, Velázquez combined two established poses for Venus: recumbent on a couch or a bed, and gazing at a mirror. She is often described as looking at herself on the mirror, although this is physically impossible since viewers can see her face reflected in their direction. This phenomenon is known as the Venus effect. In a number of ways the painting represents a pictorial departure, through
David Rokeby some off-the-shelf, some rare and esoteric, and some cooked up by Rokeby himself. Initially, in 1982, much more of the system was homemade. His circuitry, designed to speed up the response of the sluggish Apple II, was still not fast enough to analyze an image from an ordinary video camera, so he built his own low-res device: a little box with 64 light sensors behind a plastic Fresnel lens. But Very Nervous System has been evolving for 13 years, during which time the world has seen any number of technological revolutions. So Rokeby now has a lot more store-bought components