Pdf417.EncodingControl = Pdf417EncodingControl.ByteOnly Pdf417.EncodingControl = Pdf417EncodingControl.Auto However, you can restrict the encoding to only bytes or only text and bytes. The program has an algorithm to divide the data input into these three types to compress the data. There are three types of codewords: byte, text and numeric. The PDF417 encoder encodes Input bytes into codewords. Set optional parameters to control the encoding process. This object can be reused serially to produce multiple barcodes. PdfImage BarcodeImage = new PdfImage(Document, Pdf417) Ĭontents.DrawImage(BarcodeImage, 1.1, 5.2, 2.5) Ĭreate PDF417 barcode object. convert Pdf417 to black and white image Pdf417Encoder Pdf417 = new Pdf417Encoder()
#PDF417ENCODER PDF#
The final step is the creation of a black and white image.Īdding PDF417 barcode to your PDF document must follow the steps below. Once the total number of data codewords and error correction codewords is known, the encoder divides the codewords into data rows and data columns. The encoder adds error correction codewords for error detection and recovery. This conversion process compresses the bytes into codewords. The decoder must do the reverse process to recover the text. Encoding Unicode text requires converting Unicode characters into bytes. The PDF417 barcode encodes array of bytes into an image of black and white bars. I strongly recommend that you download this document if you want to fully understand the encoding options. An early version of the specifications can be downloaded from this website for free. The PDF417 standard can be purchased from the ISO organization at this website.
Wikipedia provides a good introduction to PDF417.
The PDF417 barcode documentation and specification can be found in the following websites.
#PDF417ENCODER SOFTWARE#
Technical information, documentation and samples may be found here.PDF417 barcode support software is based on article PDF417 Barcode Encoder Class Library and Demo App.
#PDF417ENCODER DRIVER#
It has become the most general purpose 2D code and is used in a wide variety of applications including driver licenses and ID cards, ticketing, postage franking, transportation boarding passes, hazardous waste identification, automobile registration and inspection stickers, document automation and processing, mobile computing and logistics. PDF417 symbols can be scanned using linear scanners, rastering laser scanners, and two-dimensional imaging devices, including mobile smartphones equipped with cameras.
#PDF417ENCODER PORTABLE#
Portable Data File 417, or PDF417, is a multi-row, variable-length symbology offering high data capacity and error-correction capability for real-world applications where portions of symbols may be damaged or destroyed during handling. Our PDF417 encoders and associated fonts allow governments, insurance companies and shippers to encode and print machine readable information as industry standard PDF417 “2D barcodes” on their documents and shipping labels using their existing computers and printers.
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