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2. Laser rangefinder - Wikipedia

   en.wikipedia.org/wiki/Laser_rangefinder

   To measure a large object like a room with a tape measure, one would need another person to hold the tape at the far wall and a clear line straight across the room to stretch the tape. With a laser measuring tool, the job can be completed by one operator with just a line of sight. Although tape measures are technically perfectly accurate, laser ...

3. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   A measuring instrument for lengths: a typical tape measure with both metric and imperial units and two US pennies for comparison A measuring instrument is a device to measure a physical quantity . In the physical sciences , quality assurance , and engineering , measurement is the activity of obtaining and comparing physical quantities of real ...

4. Video motion analysis - Wikipedia

   en.wikipedia.org/wiki/Video_motion_analysis

   A digital video camera is mounted on a tripod.The moving object of interest is filmed doing a motion with a scale in clear view on the camera. Using video motion analysis software, the image on screen can be calibrated to the size of the scale enabling measurement of real world values.

5. DV (video format) - Wikipedia

   en.wikipedia.org/wiki/DV_(video_format)

   Tape is enclosed into videocassette of four different sizes: small, medium, large and extra-large. All DV cassettes use 1 ⁄ 4 inch (6.4 mm) wide tape. DV on magnetic tape uses helical scan, which wraps the tape around a tilted, rotating head drum with video heads mounted to it. As the drum rotates, the heads read the tape diagonally.

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7. Videotape - Wikipedia

   en.wikipedia.org/wiki/Videotape

   A 14-inch reel of 2-inch quad videotape compared with a modern-day MiniDV videocassette. Both media store one hour of color video. The first commercial professional broadcast quality videotape machines capable of replacing kinescopes were the two-inch quadruplex videotape (Quad) machines introduced by Ampex on April 14, 1956, at the National Association of Broadcasters convention in Chicago.

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