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 ?
Giorgioni, "Quantifying uncertainties in multi-scale studies of fractured reservoir analogues: Implemented statistical analysis of scan line data from carbonate rocks," Journal of Structural Geology, vol.
If the user chooses 100 pixels per scan line and the spacing between pixels is significant, the step movement could cause a resonance in the mirror.
The time required to produce one image depends on the imaging depth and the number of scan lines to make each image.
Without this computations, two different scan lines, one intersecting text, and one not (but having a darker background) might have had the same score and this fact could lead to serious errors in page space recognition.
Figure 9 depicts the reconstruction for the investigation domain at the beginning of the second scan line and 3 m long.
The TEGRA sorter, developed by Key technicians and engineers, is completely different from the conventional systems for cleaning coffees known as "channel sorters." The TEGRA is part of the new family of sorters from Key using a belt-fed high speed vision system with up to four cameras across the scan line promoting efficiency, accuracy, and consistency in the processing of the product.
Resolution is the distance from one point to another between scan lines; density is the distance from one point to another within a scan line.
The direction the electron beam is swept to form each scan line is known as the line scan direction and is conventionally from left to right.
These operations generally include high speed automated document scanning and reading equipment that automatically read a preformatted scan line, containing all account and remittance information needed by the utility to automatically post the payment to their Accounts Receivable system.
This number is also called lines per inch, because scanning generally takes place one scan line at a time.
The bitmap is scanned and for every scan line, the runs of dark points are extracted and positions of the edge points are noted and compared with the previous scan line.