back projection
Quick Summary
Back projection, also known as background projection or process projection, is a photographic technique used in filmmaking. It involves projecting still or motion pictures onto a translucent screen. This projected image then serves as the background for live-action sequences that are filmed from the opposite side of the screen.12
This method was commonly used in studios to create the illusion of specific settings, such as passing scenery for actors in a car. While largely replaced by blue-screen technology in feature films due to limitations in sharpness and light loss, it still finds use in television production. Rear-projection setups can be more compact and produce images bright enough for viewing in daylight, making them suitable for schools and commercial displays.34
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.
History of filmMéliès and Porter…of parallel editing, two credible back, or rear, projections (the projection from the rear of previously filmed action or scenery onto a translucent screen to provide the background for new action filmed in front of the screen), two camera pans, and several shots composed diagonally and staged in depth—a major…
Read More…of parallel editing, two credible back, or rear, projections (the projection from the rear of previously filmed action or scenery onto a translucent screen to provide the background for new action filmed in front of the screen), two camera pans, and several shots composed diagonally and staged in depth—a major…
Read More
technology of photographyTransparency projection…may also project from the back onto a translucent screen; such rear-projection setups are more compact, and the image is often bright enough for viewing in daylight. The rear-projection system is used in schools and for commercial displays. Elaborate slide shows are produced by linking two or more projectors aimed…
Read More…may also project from the back onto a translucent screen; such rear-projection setups are more compact, and the image is often bright enough for viewing in daylight. The rear-projection system is used in schools and for commercial displays. Elaborate slide shows are produced by linking two or more projectors aimed…
Read More
