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This type of scanner tends to excel in terms of precision. Ultrasonic fingerprint scanners use high frequency sound waves to penetrate the epidermal (outer) layer of the skin. Thermal scanners sense the temperature differences on the contact surface, in between fingerprint ridges and valleys.
In essence, such a scanner is a mounted camera taking photos of a well-lit environment. Originally, such scanners were expensive and could only be found in archives and museums , but with the availability of cheap, high- resolution digital cameras , DIY planetary scanners have become affordable, and for instance are being used by volunteer scan ...
A progressive scan DVD player is a DVD player that can produce video in a progressive scan format such as 480p or 576p . Players which can output resolutions higher than 480p or 576p are often called upconverting DVD players. Before HDTVs became common, players were sold which could produce 480p or 576p. TVs with this feature were often in the ...
The scanner's processor interprets the results from the sensors, creates a tally for each candidate, and usually stores the image for later review. The ballot is sometimes immediately interpreted at polling stations allowing for voters to be notified by the voting system of voting errors such as an overvote and some types of spoilt votes .
In a raster scan, an image is subdivided into a sequence of (usually horizontal) strips known as "scan lines".Each scan line can be transmitted in the form of an analog signal as it is read from the video source, as in television systems, or can be further divided into discrete pixels for processing in a computer system.
Scanner, the stage name of British electronic musician Robin Rimbaud; Scanner (Code Lyoko), a fictional teleportation device; Scanner , a floating enemy in the Half-Life video game series; Scanners, a 1981 science fiction horror film "Scanners" , an episode of the television series Superstore
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