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Maksymalna pojemność kodu PDF417 to 1850 tekstów alfanumerycznych, 2710 cyfr dziesiętnych lub 1108 bajtów danych binarnych. Mechanizm korekcji błędów: W PDF417 używany jest algorytm korekcji błędów Reed-Solomon, który pozwala na odzyskanie danych nawet w przypadku uszkodzenia kodu.
Kod dwuwymiarowy PDF 417 (Portable Data File), to kod kreskowy zapewniający dużą gęstość zapisu danych. Wydrukowany kod zawiera kilka wierszy zakodowanej liniowo informacji.
Pdf417 là một ký hiệu mã vạch hai chiều có khả năng mã hóa cả dữ liệu văn bản và dữ liệu nhị phân. Được phát triển bởi Symbol Technologies vào năm 1991, nó được đặt tên là "Pdf" cho Tệp Dữ liệu Di động và "417" cho cấu trúc rộng 17 mô-đun và cao 4 mô-đun.
Barcode Information | Tutorials | Examples. The PDF417 barcode is a two-dimensional (2D), high-density symbology capable of encoding text, numbers, files and actual data bytes. This FAQ provides information and answers to commonly asked questions. PDF417 Overview. Error Correction Levels. X and Y Dimensions. Row and Column Limits. Truncated PDF417.
A PDF417 data (characters or bytes) may be converted to different codeword sequences, depending on how the PDF417 barcode generator program switches between compaction modes and sub-modes. There is no single specified way to encode data in a PDF417 barcode.
PDF417, a type of dynamic 2D barcode, boasts high density and exceptional data encoding capabilities. The term “PDF” denotes Portable Data File, while “417” symbolizes the pattern within the code—four bars and spaces forming a 17-part codeword.
Barcode Guide. PDF417. You are here: Home > Barcode Symbologies > General-Purpose 2-D Stacked Symbologies > PDF417. PDF417 is a two-dimensional, variable-length stacked symbology that was developed in 1992 to encode large amounts of data in a small area.
