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  2. Category:Wikipedia promotional files - Wikipedia

    en.wikipedia.org/wiki/Category:Wikipedia...

    Generally, promotional images should not be used as they are not 'free' for reusers in the way our GFDL/Creative Commons text and majority of images are, and the taking and release of an equivalent image is to be highly recommended in every case. Please refer to Wikipedia:Non-free content for further information regarding acceptability and replacement of this class of image.

  3. Projector - Wikipedia

    en.wikipedia.org/wiki/Projector

    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. A virtual retinal display, or retinal ...

  4. Video projector - Wikipedia

    en.wikipedia.org/wiki/Video_projector

    A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system. Video projectors use a very bright ultra-high-performance lamp (a special mercury arc lamp ), Xenon arc lamp, metal halide lamp, LED or solid state blue, RB, RGB or fiber-optic lasers to provide the illumination required to project the image ...

  5. Movie projector - Wikipedia

    en.wikipedia.org/wiki/Movie_projector

    A movie projector (or film projector) is an opto - mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Modern movie projectors are specially built video projectors (see also digital cinema ).

  6. Handle free image requests to the media, keeping a record of conversations between the WikiProject and third parties, and ensuring the correct attribution of images in this way delivered. Believing that, if contacted with the right approach, publicists would release a promotional image under a free license, this WikiProject will try to convince ...

  7. Wikipedia : File copyright tags/Free licenses

    en.wikipedia.org/.../Free_licenses

    Note: The licenses in this section require reprinting the entire license text with any reuse of the image. If you created the image yourself, please consider using a different license.

  8. 4K resolution - Wikipedia

    en.wikipedia.org/wiki/4K_resolution

    4K resolution refers to a horizontal display resolution of approximately 4,000 pixels. [1] Digital television and digital cinematography commonly use several different 4K resolutions. In television and consumer media, 3840 × 2160 (4K UHD) with a 16:9 aspect ratio is the dominant 4K standard, whereas the movie projection industry uses 4096 × 2160 ( DCI 4K).

  9. Pixabay - Wikipedia

    en.wikipedia.org/wiki/Pixabay

    Pixabay. Pixabay.com is a free stock photography and royalty-free stock media website. It is used for sharing photos, illustrations, vector graphics, film footage, stock music and sound effects, exclusively under the custom Pixabay license, which generally allows the free use of the material with some restrictions.