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A Closer Look At 1-D Barcodes

1-D barcodes are linear codes that contain up to 25 characters of numeric-only or alphanumeric data. Each character in the code represents something different about the product and a database provides information on what each character means.

In most cases, 1-D barcodes are read from left to right. The widths of the spaces and bars relate to a specific character in the barcode. Most 1-D barcodes typically include the following elements:

closer_look_at_1d

Quiet zone or margin: A blank space around a barcode that separates the barcode from neighboring graphics, shapes and textures

Guard patterns: Usually a pair of bars that indicate the beginning and end of specific data strings

Check digit: The digit on the far right of the code used to verify that the code is complete and not damaged or otherwise missing information

There are many different types of 1-D barcodes. The most common symbologies include:

closer_look_at_1d_2


Want to learn more? Visit the Symbologies section of the Cognex website for in-depth information barcode specifications and advantages and disadvantages of each barcode format.

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