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2. Spy pixel - Wikipedia

   en.wikipedia.org/wiki/Spy_pixel

   Spy pixels or tracker pixels are hyperlinks to remote image files in HTML email messages that have the effect of spying on the person reading the email if the image is downloaded. [1] [2] They are commonly embedded in the HTML of an email as small, imperceptible, transparent graphic files. [3] Spy pixels are commonly used in marketing, and ...

3. Structured-light 3D scanner - Wikipedia

   en.wikipedia.org/wiki/Structured-light_3D_scanner

   A structured-light 3D scanner is a 3D scanning device for measuring the three-dimensional shape of an object using projected light patterns and a camera system. [1] The light source from the scanner head projects a series of parallel patterns onto the scan target. When light projects onto the object's surface, the patterns become distorted.

4. Non-photo blue - Wikipedia

   en.wikipedia.org/wiki/Non-photo_blue

   Non-photo blue (or non-repro blue) is a common tool in the graphic design and print industry, [1] [2] being a particular shade of blue that cannot be detected by graphic arts camera film. This allows layout editors to write notes to the printer on the print flat (the image that is to be photographed and sent to print) which will not show in the ...

5. AIM (software) - Wikipedia

   en.wikipedia.org/wiki/AIM_(software)

   AIM ( AOL Instant Messenger, sometimes stylized as aim) was an instant messaging and presence computer program created by AOL, which used the proprietary OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time. AIM was popular by the late 1990s, in United States and other countries, and was ...

6. Vein matching - Wikipedia

   en.wikipedia.org/wiki/Vein_matching

   Vein matching, also called vascular technology, [1] is a technique of biometric identification through the analysis of the patterns of blood vessels visible from the surface of the skin. [2] Though used by the Federal Bureau of Investigation and the Central Intelligence Agency, [3] this method of identification is still in development and has ...

7. Laser scanning - Wikipedia

   en.wikipedia.org/wiki/Laser_scanning

   Laser scanning is the controlled deflection of laser beams, visible or invisible. Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.