Maximizing Bar Code Performance: A Look at Error Correction
October 05, 2007
by Bob Dunphy and Ben Hejl 
An ideal printing and imaging environment for reading bar codes would include each symbol printed according to it’s specifications without printing defects and each perfect bar code would be scanned into digital memory with good focus, good modulation, no distortion and no noise. These images would always be decoded with no errors and error detection or error correction would not be necessary.    full article

An Evaluation of 2D Bar Codes in Document Processing Applications
August 02, 2007
by Bob Dunphy and Ben Hejl 
A brief article focussing on the use of 2D symbols in document processing applications. In particular, the relative merits of three popular public domain 2D symbologies are compared: Data Matrix, QR Code and Micro QR Code. Following a brief overview of each symbology, a comparison of their data density, error correction, and relative processing speed is conducted.   full article

The Effects of Fax Transmission on Bar Code Decoding
June 01, 2007
by Bob Dunphy and Ben Hejl 
A brief article describing the challenges of decoding bar codes on documents that have been faxed multiple times Recomendations for selecting the best 1D and 2D barcodes for fax applications as well as methods for increasing the readability of the selected codes is given.   full article

Selecting the Correct Bar Code when Image Binarization is Required
May 01, 2007
by Bob Dunphy and Ben Hejl 
A brief article detailing the effects that a binarized image has on the readability of bar codes found in those images. It also specifies specifically which types of bar code symbologies are the best to use for binarized image applications. Both 1D and 2D symbologies are discussed.   full article