Video installation is a contemporary art method that combines video technology with installation art. It is an art form that utilizes all aspects of its surrounding environment as a vehicle of affecting the audience. Its origins tracing back to the birth of video art in the 1970s, it has increased in popularity as the means of digital video production have become more readily accessible. Today, video installation is ubiquitous, visible in a range of environments—from galleries and museums to an expanded field that includes site-specific work in urban or industrial landscapes. Popular formats include monitor work, projection, and performance. The only requirements are electricity and darkness.
One of the main strategies used by video-installation artists is the incorporation of the space as a key element in the narrative structure. This way, the well-known linear cinematic narrative is spread throughout the space creating an immersive ambient. In this situation, the viewer plays an active role as he/she creates the narrative sequence by evolving in the space. Sometimes, the idea of a participatory audience is stretched further in interactive video installation. Some other times, the video is displayed in such a way that the viewer becomes part of the plot as a character in a film.
– http://margaretnoble.net/educator/the-art-of-projection/

Unprojectable: Projection and Perspective by Tony Conrad.
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“Good Girl is an interactive live performance with 3 video-projections in real live size.
The performer (me) is dressed in white cloth and wears white make-up on the whole body, which creates another constructed projection surface. She is performing in front of the projection surface and is projection surface herself. Additionally she is walking from one video projection into the next, changing between the roles of the 3 videos: 1. a neat girl who smiles in a garden of roses; 2. a brave schoolchild doing gymnastic exercises with discipline; 3. a long-haired elegant woman bowing polite to all passing people. These 3 stereotypes show the expectations, which society holds, like images which are projected on us. It is our aim to become such a human for our whole life. Using this projection metaphor the performer uses her body expression to match these stereotypes, one by one, like we play the different roles in our everyday life.”
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Projection Art Photography by Marc Philbert
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“Austin based photographer, Davis Ayer, presents light projection as art on a living, breathing canvas. With every image, he blends the projections of urban scenes with the curves of the woman’s body.”
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“In Chris Milk’s The Treachery of Sanctuary, people took turns watching their silhouettes sprout wings, and even whole flocks of birds. The exhibit uses the motion-sensing capabilities of the Microsoft Kinect to project fantastical avian-themed silhouettes onto ceiling-high white displays.”
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Jenny Holzer, 2007
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“Beginning in the summer of 2009, 3D projection mapping saw an explosive growth in demand, spawning a long list of impressive architectural screenings of 3D videos, many of them sponsored by corporate advertisers for international brands like Samsung, Ralph Lauren, BWM and Nokia among others.”