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A numerical example will illustrate: a structure is photographed by a stereocamera with interlens separation a c = 25 cm from a distance of 1 m, z c = 100. Hence r c = a c /z c = 0.25 and on the screens the right and left representation of the cube's far edge will be separated by 1 / 4 the distance of the width.
With LCD screens, some manufacturers have opted to measure the contrast ratio and report the viewing angle as the angle where the contrast ratio exceeds 5:1 or 10:1, giving minimally acceptable viewing conditions. The viewing angle is measured from one direction to the opposite, giving a maximum of 180° for a flat, one-sided screen.
The 64:27 aspect ratio is the logical extension of the existing video aspect ratios 4:3 and 16:9. It is the third power of 4:3, whereas 16:9 of widescreen HDTV is 4:3 squared. This allows electronic scalers and optical anamorphic lenses to use an easily implementable 4:3 (1.3 3 ) scaling factor.
While THX still contends that the optimum viewing distance is a position where the display occupies a 40-degree view angle for the viewer, they too provide a range recommendation. The minimum viewing distance is set to approximate a 40-degree view angle, and the maximum viewing distance is set to approximate 28 degrees. [26]
However, this optimal distance has the characteristic of being objective and simple to implement. The latest version of the ITU BT.500 uses it: "The design viewing distance (DVD), or optimal viewing distance, for a digital system is the distance at which two adjacent pixels subtend an angle of 1 arc-min at the viewer's eye". The TABLE 1-1 :
Aspect ratio Example resolutions Notes 1:1 1920×1920 Used in some desktop and professional monitors. 5:4 (1.25:1) 1280×1024: Common until the early 2000s. 4:3 (1. 3:1) 1024×768, 1600×1200 The standard aspect ratio for computer software, videogames, and analog video until the 2000s, as well as for early 35 mm film.
Once seen as an "exotic" aspect ratio, [1] since 2009, it has become the most common aspect ratio for televisions and computer monitors, and is also the universal standard image format for the universal 1080p, 2160p and 4320p formats. 16:9 or "sixteen-nine" is the universal widescreen standard format [2] and Wide-aspect Clear-vision. [3]
Two dual-monitor digital audio workstations. Multi-monitor, also called multi-display and multi-head, is the use of multiple physical display devices, such as monitors, televisions, and projectors, in order to increase the area available for computer programs running on a single computer system.