File:DVD-Video enhancement using anamorphic lens - 2.png
DVD-Video_enhancement_using_anamorphic_lens_-_2.png (593 × 270 pixels, file size: 36 KB, MIME type: image/png)
Captions
Captions
DescriptionDVD-Video enhancement using anamorphic lens - 2.png |
1) While anamorphically-enhanced DVD-Video contains no wasted resolution for 16:9 (1.78:1) videos, the use of black bars or mattes is necessary for wider formats such as 2.35:1 movies which are too wide to fit into the 16:9 frame. The display device would display these black bars as if they were a part of the video, wasting some of the device's native resolution. 2) To overcome the wasted resolution, the video is scaled (stretched) vertically, eliminating the black bars. This vertical stretch, via pixel en:interpolation, is performed by a video processor which is either a built-in component of the projector or an external model such as a en:Home theater PC. The image, however, becomes distorted in the process and needs to be corrected. 3) To restore the original aspect ratio, an anamorphic lens is placed in the light path of the projected image. The lens uses either vertical compression (VC) or horizontal expansion (HE). Since the lens works optically, the increase in vertical resolution is preserved. In addition, the en:luminance is altered: vertical compression increases the brightness of the video, while horizontal expansion decreases it. |
Date | |
Source | en:User:Shawnc |
Author | en:User:Shawnc, uploaded by Andreas -horn- Hornig |
Permission (Reusing this file) |
en:User:Shawnc put it under the PD-user |
Other versions | original posted en:Image:DVD-Video enhancement using anamorphic lens.gif |
Public domainPublic domainfalsefalse |
![]() |
This work has been released into the public domain by its author, Shawnc. This applies worldwide. In some countries this may not be legally possible; if so: |
![]() |
This file has been superseded by DVD-Video enhancement using anamorphic lens.png. It is recommended to use the other file. Please note that deleting superseded images requires consent. Reason to use the other file: "PNG version is 25% smaller"
|
![]() |
Original upload log
[edit]Date/Time | Dimensions | User | Comment |
---|---|---|---|
15 April 2006, 10:07:32 | 593 × 270 (47854 bytes) | Andreas -horn- Hornig (talk · contribs) | {{Information| |Description = <br> English:<br> '''Increasing the resolution of [[:en:Aspect ratio (image)|2.35:1]] widescreen video on a [[:en:DVD]] disk by eliminating wasted [[:en:pixel]]s due to [[:en:letterbox]]ing. This is normally possible only wi |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 00:30, 7 December 2014 | ![]() | 593 × 270 (36 KB) | GifTagger (talk | contribs) | Bot: Converting file to superior PNG file. (Source: DVD-Video_enhancement_using_anamorphic_lens.gif). This GIF was problematic due to non-greyscale color table. |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
- File:DVD-Video enhancement using anamorphic lens.gif (file redirect)