Linear Verification

Familiar bar codes such as UPC/EAN, Code 39, Code 128, and the like are “linear”, or “1D” bar code symbols.  These symbols are verified in accordance withe ANSI X3.182-1990 and ISO 15416.

Prior to 1990, when the ANSI specification was published, there was no universally adopted method for bar code verification that adequately addressed the needs of industry.  The publication of ANSI X3.182 marked the beginning of formal verification methods based on the “scan reflectance profile” of a bar code.  The so called ANSI methodology is the basis of most of the verification techniques adopted since.

If you need to very 1D bar codes you have a selection several Webscan products, including:

Product	Reason to use this product for linear verification	Example Product Picture
TruCheck Laser USB	For Windows PC based verification of linear and stacked symbologies.
TruCheck 201	For stand alone verification of linear and stacked symbologies.
TruCheck 2D USB	For imager based verification of 2D Matrix Symbologies and small linear and/or stacked symbols, especially DataBar which is especially small.