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 ?
Measurements of discontinuities were carried out with the use of both scanline and random survey techniques.
Laine, "MATLAB script for analyzing and visualizing scanline data," Computers and Geosciences, vol.
With offices in Los Angeles, Vancouver and Munich, Scanline VFX specializes in creating complex visual effects for high-end feature films and TV commercials.
Calibrated cameras deliver rectified stereo image pairs which ensure epipolar geometry to limit the search for a matching pixel to a single scanline.
Along scanlines, the point of intersection of the fractures with the scanline is recorded and, in the case of faults, throw, dip-direction, dip-angle and vector of movement were also recorded for further geometric and kinematic analysis.
Trace frequency Number of fractures per unit length counted along a vertical and horizontal scanline.
Estimation of discontinuity spacing and trace length using scanline surveys.
Inverse perspective mapping in scanline order onto non-planar quadrilaterals.
The column begins with a normal figure (a line drawing), which runs from scanline 200 to 800, with irregular low values of bits per scanline (the bump at 150 is the heading line on the page).
Rendering modes include ray tracing, scanline and more.
Similar timings were obtained for the Reentrant Polygon Clipping [9] and scanline fill algorithms and listed under Method 2.