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Most people sit about 60 cm away from their monitors and have quite a good feel about screen sizes at that distance. To convert the manufacturer's apparent screen size to a desktop monitor position, divide the screen size by the distance in feet, then multiply by 2. Consumer-level HMDs typically offer a FOV of about 110°.
Usually the technology measures the distance between points of a person's face. Three-dimensional facial recognition using infrared also exists. [3] Developers of facial recognition have realized that ears are just as unique as faces, so technology is being developed to identify people by their ears. [4]
Here, each l i represents the distance from the transmitter to each of the three receivers, calculated based on the travel time of the ultrasonic wave using the equation l = ct us. The constant c denotes the speed of sound, which is equal to 343.2 m/s in dry air at temperature 20°C.
A flat-panel display (FPD) computer monitor A cathode-ray tube (CRT) computer monitor A computer monitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a visual display , support electronics, power supply, housing , electrical connectors , and external user controls.
Fitts's law: draft of target size W and distance to target D. Fitts's law (often cited as Fitts' law) is a predictive model of human movement primarily used in human–computer interaction and ergonomics.
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On 2D displays, such as computer monitors and TVs, display size or viewable image size (VIS) refers to the physical size of the area where pictures and videos are displayed. The size of a screen is usually described by the length of its diagonal , which is the distance between opposite corners, typically measured in inches.
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