Barcode Glossary S

Barcode-Glossary

Barcode-Glossary S

  • Scanning Window

  • The entire area in front of the input unit of a no-touch reading device, in which symbols can be read.

  • Second Read Ratio

  • Number of correct readings in case of two or more reading attempts, divided by the number of reading attempts.
    See also "Fist Read Ratio".

  • Show Through

  • Decrease of the reflectance value (the spaces) occurring in case of transparent packing materials when a dark object lies below the barcode.
    Compare: "Opacity".

  • Single Line (Beam) Scanner

  • A scanner from which the light beam goes into a single direction and thus creates a one-dimensional scanning height or scanning width.

  • Spot

  • A speck of dirt or a different surface with a low reflectance in the area of a symbol whose reflectance ought to be high.
    Compare: "Void".

  • Stacked Barcode

  • Stacked or multi-row barcodes (e.g. PDF 417, Codablock) are also called 2D-Barcodes (two-dimensional barcodes).
    Imagine a 2D-Barcode to be a long text that is wrapped row by row and continued in the following row. The connection is made via line numbers, and all data of one symbol are together checked for accuracy by means of a symbol check character.
    See also "1D-Barcode" and "Matix-Code".

  • Substrate

  • The material or carrier onto which a barcode symbol or OCR character is printed or onto which a coating is applied.

  • Scan-Reflectance-Profile

  • The graphic display of the reflectance fluctuations along the scan-path across as symbol. It represents the analogue wave form, created by the scanning device for this symbol.

  • Scanning

  • Machine-reading of a barcode. Originally used in the sense of "laser-scanning", nowadays generally used in the sense of "reading of barcodes with a device".

  • Scanner

  • An electric device that transforms optical information (e.g. a printed barcode symbols) for the ensuing decoding into electrical signals and transmits these to a computer.
    See also "Barcode Reading Device" "Decoder".

  • Slot Scanner

  • Description of a specific type of omnidirectional scanner used for electronic cash register systems. The scan beams are lead through a window, similar to a slit or a pattern of slits.

  • Self-Checking (Character)

  • Property of barcode symbols using a check algorithm for every character within one code. Self-checking barcodes are intrinsically safe, meaning that a change within a character is detected to be an error and therefore leads to a no-read.
    Substitution errors can occur only when two or more individual printing errors occur within one character. By using an additional check character, this substitution error can also be detected.
    Not self-checking codes normally have a check character added to the encoded data.

  • Spectral Response

  • The photosensitivity of a scanners or a different reading device in case of light with differing wavelengths.

  • Space

  • The light element (an area with a relatively high reflectance) between the bars of a barcode symbol.

  • Specular Reflectance

  • Reflectance of an area where the reflectance angle to the perpendicular is equal to the angle of entry to the perpendicular.
    Compare: "Diffuse Reflectance".

  • Start-Pattern

  • With start patterns, start characters are described that do not correspond to the algorithm of the data characters, as for example with the 2 of 2 Symbologies.

  • Start-Character

  • An additional character that marks the beginning (left edge) of a barcode symbol. In connection with the stop character that is how the readability in two directions and the identification of the barcode symbology (barcode type) is made possible.

  • Stop-Pattern

  • With stop patterns, stop characters are described that do not correspond to the algorithm of the data characters, as for example with the 2 of 2 Symbologies.

  • Stop-Character

  • An additional character that marks the end (right edge) of a barcode symbol.
    In connection with the start character that is how the readability in two directions and the identification of the barcode symbology (barcode type) is made possible.

  • Substitution Error

  • A character that is decoded falsely during reading a barcode symbol and then replaced by a different, valid character. Substitution errors can only be made as near as impossible by using a check digit or a check character.
    Compare: "Misread, No-Read".

  • Symbol

  • See "Barcode Symbol".

  • Symbol Density

  • See also "Barcode Density".

  • Symbol Contrast

  • The reflectance difference between the highest and the lowest reflectance within a Scan-Reflectance-Profile.

  • Symbol Width

  • The overall width of a barcode symbol inclusive quiet zones.

  • Symbology

  • A standardized form of presenting data in a barcode. Each symbology specification determines the relevant specific structure rules and the specific symbol structure.

  • Symbology-Identifier

  • A series of characters, created by the decoder, preceding the transmitted and decoded data; it identifies the symbology as a source of the decoded data.

  • Symbol Check Character

  • A symbol character that is calculated with regard to the remaining symbol characters of a barcode symbol following an algorithm determined in the symbology specification. It is used for checking whether the barcode was read correctly. The symbol check character does not belong to the data encoded in the symbol.
    See "Check Digit, Check character".

  • Symbol Architecture

  • The structure of a barcode symbol.
    See also "Symbology".

  • Symbol Character

  • An array of dark and light elements that usually encodes a data character, an auxiliary character or, under certain conditions, two or more data characters.