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Transparency (projection) Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
Overhead projector. An overhead projector (often abbreviated to OHP), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience. In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also ...
By 1900, photographic images on glass had replaced hand-painted images, but the black-and-white photographs were sometimes hand-colored with transparent dyes. The production of lantern slides had become a considerable industry, with dimensions standardized at 3.25 inches high by 4 inches wide in the US and 3.25 inches square in the UK and much ...
Here are five mistakes young people make that prevent them from growing their wealth. 1. Underestimating the Value of Starting Early. Having the knowledge and foresight to start saving when you ...
Transparency (graphic) GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.
LCD projector. An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. To display images, LCD (liquid-crystal display) projectors typically send light from a metal-halide lamp through a prism or series ...
All the PowerPoint people from Forethought joined Microsoft, and the new location was headed by Robert Gaskins, with Dennis Austin and Thomas Rudkin leading development. [49] PowerPoint 1.0 for Macintosh was modified to indicate the new Microsoft ownership and continued to be sold. [49]
6.0 and below have broken alpha-channel transparency support (will display the default background color instead). [75] [76] [77] 7.0 and below cannot combine 8-bit alpha transparency AND element opacity (CSS – filter: Alpha (opacity=xx)) without filling partially transparent sections with black. [78] 8.0 and below have inconsistent/broken ...