Introduction Specification FAQs

Introduction

The core of the barcode decoder SDK is the barcode reader from tasman.bars.

Barcode Symbologies

1 Dimensional Barcodes:

• Code 11
• Code 39
• Code 93
• Code 128
• Codabar
• Interleaved 2 of 5
• Code 32
• EAN 13
• EAN 8
• Telepen
• UPC A
• UPC E
• 2 and 5 digit supplementals associated with EAN and UPC barcodes.
• Patch Codes: types 1, 2, 3, 4, 6 and T.


2 Dimensional Barcodes:

• PDF417
• Data Matrix
• QR Code

FAQs

My images can contain several barcodes, but I only need to read particular ones.

The package reports all the barcodes (of the symbology or symbologies that you specify) that it finds in an image. It is simple to loop through all returned barcodes and just extract particular barcodes based on, for example, the position of the barcodes within the image, or the data that they encode.

The barcodes are printed in several orientations within the image

Before reading an image you specify a read direction - one or more of right, left, up, down. The package will normally successfully identify barcodes that are rotated up to 45 degrees from the read direction. So if you specify all four read directions, the package should identify barcodes at any orientation. (But reading in all four directions takes longer than just one direction).

I need to know the position and orientation of barcodes within images

The engine can return the data, position, symbology and orientation of each barcode it finds on the image.