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Before personal computers, they were 35 mm slides viewed with a slide projector [1] or transparencies viewed with an overhead projector. In the digital age, a slide most commonly refers to a single page developed using a presentation program such as MS PowerPoint, Apple Keynote, Google Slides, Apache OpenOffice or LibreOffice.
A slide show in Germany. A slide show, or slideshow, is a presentation of a series of still images on a projection screen or electronic display device, typically in a prearranged sequence. The changes may be automatic and at regular intervals or they may be manually controlled by a presenter or the viewer.
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens , but some newer types of projectors can project the image directly, by using lasers .
An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed. However some differences are necessitated by the much larger size of the transparencies used (generally the size of a printed page), and the requirement ...
Projector-camera systems may also be used for artistic and entertainment purposes. [2] A pro-cam system consists of a vertical screen for implementing interpersonal space where front-facing videos are displayed, and a horizontal projected screen on the tabletop for implementing shared workspace where downward facing videos are overlapped.
Multimedia (multi-image) setup for the 1988 Ford New Car Announcement Show, August 1987, Detroit, MI. In the intervening forty years, the word has taken on different meanings. In the late 1970s, the term referred to presentations consisting of multi-projector slide shows timed to an audio track. However, by the 1990s, 'multimedia' had taken on ...
A webcam is mounted on arms to operate a document camera, allowing it to be positioned over a page. The camera connects to a projector or similar video display system, enabling a presenter to write on a sheet of paper or display a two or three-dimensional object while the audience watches. Larger objects, for instance, can be positioned in ...
Multi-image is the now largely obsolete practice and business of using 35mm slides (diapositives) projected by single or multiple slide projectors onto one or more screens in synchronization with an audio voice-over or music track.