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A webcam is a video camera which is designed to record or stream to a computer or computer network. They are primarily used in video telephony , live streaming and social media , and security . Webcams can be built-in computer hardware or peripheral devices , and are commonly connected to a device using USB or wireless protocol .
A liveness test, liveness check or liveness detection is an automated means of checking whether a subject is a real person or part of a spoofing attack.. In a video liveness test, users are typically asked to look into a camera and to move, smile or blink, and features of their moving face may then be compared to that of a still image.
Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.
Webcams are video cameras that stream a live video feed to a computer. Many smartphones have built-in video cameras and even high-end smartphones can capture video in 4K resolution. Special camera systems are used for scientific research, e.g. on board a satellite or a space probe, in artificial intelligence and robotics research, and in ...
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Analyzer is a suite of software tools published by DXOMARK, that includes test targets and test equipment. It is used by camera companies, as well as press publications and websites; [34] to test sensors, lenses, and standalone cameras, as well as mobile devices with cameras. Testing can be performed on both RAW and JPEG images, as
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