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Rendition of SD ECR-1-1978 color bars Colors are only approximate due to different transfers and color spaces used on web pages and video (BT.601 or BT.709). SMPTE color bars are a television test pattern used where the NTSC video standard is utilized, including countries in North America.
The pillarbox effect occurs in widescreen video displays when black bars (mattes or masking) are placed on the sides of the image. It becomes necessary when film or video that was not originally designed for widescreen is shown on a widescreen display, or a narrower widescreen image is displayed within a wider aspect ratio , such as a 16:9 ...
Censor bars are typically used for satire, [3] [4] although they remain in contemporary use to address privacy concerns. Censor bars are also used in art forms such as blackout poetry . Censor bars may also have the words 'censored', 'redacted', 'private information', 'sensitive information', etc. to indicate their presence.
Original, Anamorphic and letterbox. Anamorphic widescreen (also called full-height anamorphic or FHA) is a process by which a widescreen image is horizontally compressed to fit into a storage medium (photographic film or MPEG-2 standard-definition frame, for example) with a narrower aspect ratio, reducing the horizontal resolution of the image while keeping its full original vertical resolution.
In letterboxing, the top of the image is slightly lower than usual, the bottom is higher, and the unused portion of the screen is covered by black bars. For video transfers, transferring a "soft matte" film to a home video format with the full frame exposed, thus removing the mattes at the top and bottom, is referred to as an "open matte transfer."
[3] [4] The name "Letterboxd" is an allusion to letterboxing, the practice of placing black bars on the edges of a screen to preserve a movie's original aspect ratio. [5] Buchanan and von Randow launched an invitation-only beta version on 24 April 2012 [6] [7] and opened the site to the general public on 8 February 2013. [8]
The term "SmileBox" is a registered trademark [4] used to describe a type of letter-boxing for Cinerama films, such as on the Blu-ray release of How the West Was Won.The image is produced by using a map projection-like technique to approximate how the picture might look if projected onto a curved Cinerama screen.
Sometimes this black is filled with a stretched and blurred form of the image. In addition, the SMPTE C RGB primaries used in North American standard definition are different than those of BT.709 (SMPTE C is commonly referred to as NTSC, however it is a different set of primaries and a different white point than the 1953 NTSC. [ 22 ] ).