- Source: Human presence detection
Human presence detection is a range of technologies and methods for detecting the presence of a human body in an area of interest (AOI), or verification that computer, smartphone (or other device controlled by software) is operated by human.
Software and hardware technologies are used for human presence detection. Unlike human sensing, that is dealing with human body only, human presence detection technologies are used to verify for safety, security or other reasons that human person, but not any other object is identified. Methods can be used for internet security authentication. These include software technologies such CAPTCHA and reCAPTCHA, as well as hardware technologies such as:
Radar technology
Image recognition of human shapes
Security switch
Fingerprint sensors
Infrared detectors
Acoustic sensors
Vibration sensors
Examples
reCAPTCHA is a CAPTCHA-like system designed to establish that a computer user is human (normally in order to protect websites from bots) and, at the same time, assist in the digitization of books.
A sensor based on a piezoelectric film (EMFI sensor) is used to detect mechanical vibrations and the presence of a person seated on the rear bench of a vehicle. In order to distinguish between humans, heavy objects, and empty seats, signal processing techniques are used. mmWave radar technology can also be used to detect the presence and location of humans in vehicles.
History
The first robot to successfully demonstrate a static motion detection capability was ROBART I, which was Everett's 1981 thesis project at the Naval Postgraduate School.
In 1997 CAPTCHA ("Completely Automated Public Turing test to tell Computers and Humans Apart") was invented. This test is used to ensure that computer is operated by a human, preventing spam robots.
See also
Face detection – Identification of human faces in images
Human sensing – Technologies to detect a human presence
CAPTCHA – Test to determine whether a user is human
Defense strategy (computing) – Concept to reduce computer security risks
Security switch – Physical switch to disable unwanted access or operation by breaking signal or power,