scan line

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scan line

[′skan ‚līn]
(electronics)
A horizontal row of pixels on a video screen that are examined or refreshed in succession in one sweep across the screen during the scanning process.

scan line

The line produced on a recording medium frame by a single sweep of a scanner.

scan line

(hardware)
A horizontal line of pixels generated by a single horizontal sweep of the beam from a monitor's electron gun. The number of scanlines that make up a frame is the vertical resolution.

scan line

A horizontal line (a row) in a video frame. Camcorders sense image frames a line at a time, and display systems create images a line at a time. The scan lines are the vertical resolution of the system; for example, an NTSC TV signal uses 525 lines, 480 of which contain image data ("active" scan lines) and 45 are the vertical blanking interval (VBI) in between the frames. Following are the active scan lines of various video formats. See scan rate and horizontal scan frequency.

Analog              ActiveFormats             Scan Lines

  VHS                 240
  8mm                 240
  Sony U-matic 3/4"   250
  Sony U-matic SP     330
  S-VHS               400
  Hi8                 400
  Laserdisc           425
  NTSC                480 out of 525
  PAL/SECAM           580 out of 625


  Digital             ActiveFormats             Scan Lines

  DVD                 480
  DV                  480
  SDTV Digital TV     480
  EDTV Digital TV     480
  HDTV Digital TV     720 & 1080
References in periodicals archive ?
"Instead, NASA would need a slow-scan camera optimized for a smaller format, 320 scan lines of data at 10 frames per second that could be transmitted at just 500 kHz."
Six scan lines have been carried out on six carbonate beds (Figure 4(a)) with different thickness: C1-59 (dolostone, 71cm), C2-3 (wackestone-packstone, 33 cm), C2-5 (wackestone-packstone, 26 cm), C2-6 (dolostone, 43 cm), C2-7 (partially dolomitized limestone, 21cm), and C2-8 (wackestone-packstone, 47 cm) (Figure 4(a)).
Caption: Figure 3: Preliminary Delaunay triangulation of adjacent tooth surface scan lines.
Because the image intensity varies strongly from one scan line to the next, but stays nearly constant over long segments within each line, this fluctuation can be treated as a background for each scan line.
There are many possible uses for these spare channels, such as providing synchronizing signals to allow viewing the mirror scan lines on an oscilloscope, or re-creating any of the 6 signals digitized by the ADC for troubleshooting purposes.
You can look at a photo and you can scan lines of text or even lengthy articles, but there's no way to effectively skim a video.
Three scan lines that are 45 degrees apart and across the droplet center (shown in Fig.
Appearance of scan lines annoy video makers, thus scan frequency must be faster than shutter time in order to avoid such issues.
Standard post-processing includes the R-[theta] conversion to rectangular coordinates from the polar image comprising the original scan lines. However, there are several areas in which further processing can improve performance.
The accuracy is changed by how fine of scan lines are being used in the camera.
In 1080p display resolution, 1080 stands for number of horizontal scan lines and 'p' stands for progressive scan (complete frame is scanned sequentially from top to bottom in horizontal direction) whereas in 720p resolution, there are 720 horizontal scan lines of display.
The time required to produce one image depends on the imaging depth and the number of scan lines to make each image.