BARCODE IMAGE SERIAL NUMBER
BARCODE IMAGE GENERATOR
BARCODE IMAGE LICENSE
BARCODE IMAGE WINDOWS

BARCODE IMAGE LICENSE

They are basically a license plate that is linked to data files. Here’s an easy way to understand how barcodes work: think of them as a more technologically savvy way to transfer strings of characters. If (cCheckDigit = ( char)(( int)(uCheckSum + 32)))īut it doesn't work in case checksum is, I use all length of 'sResult' not minus one.Barcode Types Explaining the Different Barcode types UCheckSum = (uCheckSum - uCheckDigit) % 103

Uint uCheckDigit = ( uint)(( int)((( int)cCheckDigit) - 32) * iCodes) SResult = sResult.Substring( 0, iLength - 1) SResult = sResult.Substring( 0, iLength - 2) Added VB.NET translation of the barcode detection class and the COM interface provided by Alessandro Gubbiotti.ĬCheckDigit = ( char)(Convert.ToInt32(sResult.Substring(iLength - 2)) + 32)

October 19, 2009: Improved Code39 detection, bugfixes.

BARCODE IMAGE GENERATOR

For implementing Code 128: the character table and checksum calculation as published on, and the barcode generator published by Inc., for testing.

For implementing EAN detection: Wikipedia articles on the European Article Number, EAN-2, and EAN-5.

I used the following references while writing this project:

BARCODE IMAGE SERIAL NUMBER

In Code128test-CodeC.png, this enables the software to read both the serial number and the UPC code that are printed side-by-side. I have added the concept of 'barcode zones', to allow detection of differently scaled barcodes on the same scan line.In Code39, we only need to distinguish between narrow and wide bars, but the other barcode types use four different bar widths. This should allow for better detection rates when reading EAN and Code128. The code uses a more advanced approach for measuring the 'narrow bar width' than qlipoth's and Liedblad's versions.

The serial number in the sample image Code128test-CodeC.png starts as Code C, but the last digit is added as Code B.

The Code128 reader has mixed code page support.

As shown in the screenshot, a supplemental barcode will be returned as a separate barcode string starting with 'S'.

The EAN reader also reads the 2 or 5 digits supplemental barcodes often found on books and periodicals.

The EAN reader will also detect UPC codes. Supported types are Code39, EAN, and Code128. ScanPage( ref CodesRead, bmp, numscans, ScanDirection.Vertical,īarcodeType.Code39 | BarcodeType.Code128) The included TestApp (written in VB.NET) demonstrates the basic use:

BARCODE IMAGE WINDOWS

To use the code, call FullScanPage or ScanPage with the Windows Bitmap object containing your image. NET 1.1 compatible, so the actual code should also be compilable in Visual Studio 2003 or 2005. However, I have not used any constructs that are not. To open the solution, you'll need Visual Studio 2008.

Fixed some bugs that were reported for qlipoth's project and for the related project Reading Barcodes from an Image published by Benjamin Liedblad in 2004.

The original project could only detect Code39 barcodes.

Added EAN/UPC and Code128 barcode support.

The main problem in the original project was that it used Bitmap.RotateFlip, and that function is quite slow. The code has much less chance of detecting a 'barcode' that is not actually present.

Validation is added for Code39 barcodes.

This code has several improvements compared to the original code written in 2005: In the end, my changes amounted to a significant rewrite that justifies a new CodeProject publication.

His code came a long way towards what I wanted, but I needed a few improvements. When searching for a solution in C#, I found qlipoth's CodeProject article: Reading Barcodes from an Image - II. My company has a need for reading barcodes from images that also contain text on the same page as the barcode(s). I asked and got permission from qlipoth to publish an enhanced version of his code. This project is based on the CodeProject article: Reading Barcodes from an Image - II by qlipoth.

Barcode image