Linear (1D) Verification

ANSI Barcode Standards

Scan Reflectance Profile Graphic


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

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


ANSI X3.182-1990 – ensure compliance with 1D barcodes with the following Webscan products:

TruCheck Optima™For users that need to verify both linear (1D) and 2D barcodes. Multiple versions are available to your field of view and minimum x dimension requirements.
TruCheck 2D USBFor imager based verification of 2D Matrix Symbologies and small linear and/or stacked symbols, especially DataBar which is especially small.