Barcode is a representation of data, which can be read by barcode scanners. Barcodes are represented in the form of parallel lines and the spacings, which store information. Barcode consists of different parts, they are:
"X" Dimension: The smallest element in a bar code is known as "x" dimension. This can be narrowest bar or space in the code. The dimension can be decided not only on the space present on the document to print the code, but also on the kind of scanner and environment in which the label is scanned. For the most effective and reliable scanning, density must be lowest. It is suitable method to have all bars and spaces in integral multiples of the "x" dimension.
Resolution: Resolution of a scanner means the smallest element it can notice or scan. If the resolution of a scanner is not sufficiently high, it may not be able to read small elements in high-density bar codes. For the most reliable scanning, the resolution of scanning devices must be similar to the narrowest element of any one symbol.
Density: Density can be measured in either character per inch method or by the narrow bar size method. The character per inch density is detected by the combination of the "x" dimension and the element ratio. Narrower bars produce greater density, but they are more prone to print voids, stains, and dirt, which can influence bar width interpretation.
Element Ratio: To enable a scanner to differentiate between the wide and narrow elements, a least possible ratio is required based upon value of resolution used for printing the bar code. The width of the wide element must be minimum twice that of narrow element. Lower the element ratio, smaller the tolerance range. The most successful scanning can be achieved with a wide-to-narrow element ratio, which is near to 3:1 as possible.
Quiet Zone: Code designers established a zone, which is present right and left of a bar code and free from all printing. This quiet zone provides time to the scanner to adjust its opto-electronic measurement circuits to correctly detect the critical width of each bar in the code message and to find out the contrast between the bar and the space between each bar.
"X" Dimension: The smallest element in a bar code is known as "x" dimension. This can be narrowest bar or space in the code. The dimension can be decided not only on the space present on the document to print the code, but also on the kind of scanner and environment in which the label is scanned. For the most effective and reliable scanning, density must be lowest. It is suitable method to have all bars and spaces in integral multiples of the "x" dimension.
Resolution: Resolution of a scanner means the smallest element it can notice or scan. If the resolution of a scanner is not sufficiently high, it may not be able to read small elements in high-density bar codes. For the most reliable scanning, the resolution of scanning devices must be similar to the narrowest element of any one symbol.
Density: Density can be measured in either character per inch method or by the narrow bar size method. The character per inch density is detected by the combination of the "x" dimension and the element ratio. Narrower bars produce greater density, but they are more prone to print voids, stains, and dirt, which can influence bar width interpretation.
Element Ratio: To enable a scanner to differentiate between the wide and narrow elements, a least possible ratio is required based upon value of resolution used for printing the bar code. The width of the wide element must be minimum twice that of narrow element. Lower the element ratio, smaller the tolerance range. The most successful scanning can be achieved with a wide-to-narrow element ratio, which is near to 3:1 as possible.
Quiet Zone: Code designers established a zone, which is present right and left of a bar code and free from all printing. This quiet zone provides time to the scanner to adjust its opto-electronic measurement circuits to correctly detect the critical width of each bar in the code message and to find out the contrast between the bar and the space between each bar.
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