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 ?
Data acquisition of the images is accomplished by recording the 16-bit image values and storing them into a linear scan line array.
Standard post-processing includes the R-[theta] conversion to rectangular coordinates from the polar image comprising the original scan lines.
The sector size affects the number of scan lines needed per image.
Raster scanning involves the deflection of the electron beam over the entire usable surface of the phosphor-coated CRT screen in a series of regularly spaced lines known as scan lines (Figure 1).
If two or more runs in the current scan line are connected to the same run in the previous scan line, new chains are opened.
In this example, the radar beam passes through the EW receivers location on the second scan line.
Open mail, process payments and deposit funds using guidelines established by the City of Lowell and the Vendor Vendor must have the capability to process documents with the OCR A scan line.
Similar to its predecessor, 3M Model 812's sophisticated laser scanner is effective for virtually any bar code location or orientation, and provides a visible scan line that helps the user place items correctly.
The awarded vendor will be required to provide 25 TEST Run Samples with OCR SCAN LINE by August 1, 2015.
integration (link to the scan line document repository).
The output of the project will be a "hands free" micro-scan tool, to be carried on the arm or the finger of the operator, capable of deflecting a laser beam to obtain a scan line and to sense the light diffused by a target, typically a bar code, so producing an electrical output signal.
In addition to its class-leading 68 scan line pattern and aggressive 6000 scans per second performance, Stratos has a number of profit-producing features.