barcode reading software
The graph below is a representation of a single scan line bisecting the image of the barcode shown underneath. The scale on the Y-axis represents pixel values with distance in pixels on the X-axis. Note that the value of a pixel is derived from the RGB value using the formula (R + G + B) / 3. The …
As the toolkit scans the images in a document, it assigns a “hit-count” to each barcode-like pattern it finds. The hit-count for a very clear barcode will typically be in the region 20 to 100, depending on the size of the barcode and the settings used within the sdk. The PrefOccurrence and MinOccurrence properties specify hit-count levels …
PHP developers may be interested in the following link to an interface to the Softek barcode Reader Toolkit for Linux: http://github.com/mkoppanen/php-bardecode Many thanks to Mikko Koppanen.
2-D barcode formats such as PDF-417 can encode a huge character set, which means that the barcode reader toolkit needs to encode characters outside the normal ASCII range. If the Encoding property is set to 2 then the toolkit will use Unicode encoding, whereby characters can be represented by the string &#N; where N is …
UPC-A barcodes are a subset of EAN-13. For example, the UPC-A barcode “016000336100” is the same as the EAN-13 barcode “0016000336100”. In fact, UPC-A barcodes are the sub-set of EAN-13 barcodes that start with a 0. The ReadEAN13 property controls whether any barcodes of type EAN-13 are recognized – and this includes UPC-A, whether or …
The SDK can be used to convert from TIFF to PDF format as part of the “tiff split” functionality. If the input file for the ScanBarCode method is in TIFF format and the TifSplitPath property is set to a value ending with “.pdf”, then the toolkit will split the input file into sub-files in PDF …
Code 39 barcodes can be generated using either fonts or software such as embedded objects. When using a font, the text should include the start/stop * character at either end of the barcode, but software generated barcodes will often add the * characters automatically. This can sometimes result in barcodes with 2 * characters at either …
2-D barcode formats such as PDF-417 can encode a huge character set, which means that the barcode reader toolkit needs to encode characters outside the normal ASCII range. If the Encoding property is set to 2 then the toolkit will use Unicode encoding, whereby characters can be represented by the string &#N; where N is …
Delphi 2009 developers may have found some problems passing strings to and from the toolkit. This seems to be down to unicode support in Delphi 2009 and can be resolved with some simple code changes. For example, in previous versions of Delphi you might have code similar to: NumCodes:=stScanBarCode(PChar(OpenDialog1.FileName)); …but in Delphi 9 this needs …
This document explains how the properties of the toolkit can effect the speed at which PDF documents are processed. The PDF extension allows you to read barcodes from PDF documents. Version 7.4.1 or later… Version 7.4.1 introduced a faster and more accurate method of processing image-only PDF documents (e.g, a PDF document generated as the …
