Dynamsoft Barcode Reader SDK一款多功能的条码读取控件，只需要几行代码就可以将条码读取功能嵌入到Web或桌面应用程序。这可以节省数月的开发时间和成本。能支持多种图像文件格式以及从摄像机或扫描仪获取的DIB格式。使用Dynamsoft Barcode Reader SDK，你可以创建强大且实用的条形码扫描仪软件，以满足你的业务需求。
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根据AAMVA的卡设计标准，PDF417二维条形码符号是在符合规定的驾驶执照/身份证明文件中必须具备的最低强制性机器可读技术。条形码编码有关持卡人的关键信息，包括姓名，出生日期，性别，眼睛的颜色，身高等。
有两种方法可以从计算机的驱动程序许可证中提取数据：
使用OCR技术识别ID上打印的字符
使用条形码识别技术解码PDF417符号，然后将其解析为人类可读的格式
一般而言，后者比前者更准确和更具成本效益。在本文中，我们讨论了如何使用条形码技术从驾驶执照中提取文本。
从手机上的驾驶执照PDF417中提取数据
选项1：从Web应用程序中的相机解码PDF417
如果您想从相机来源读取驾驶执照，请参阅文章：如何在JavaScript中识别美国驾驶执照中的说明。
下载完整样本
选项2：在Android和iOS本机应用程序中阅读驾驶执照
如果您希望在本机应用程序中阅读驾驶执照，请参阅文章：如何在Android Mobile Apps上识别美国驾驶执照中的说明。
将PDF417结果解析为人类可读的格式
将PDF417值解码后，我们可以将其解析为单独的字段。
driverLicenseFields = [
{ ‘abbreviation’: ‘DAA’, ‘description’: ‘Full Name’ }
, { ‘abbreviation’: ‘DAB’, ‘description’: ‘Last Name’ }
, { ‘abbreviation’: ‘DAB’, ‘description’: ‘Family Name’ }
, { ‘abbreviation’: ‘DAC’, ‘description’: ‘First Name’ }
, { ‘abbreviation’: ‘DAC’, ‘description’: ‘Given Name’ }
, { ‘abbreviation’: ‘DAD’, ‘description’: ‘Middle Name or Initial’ }
, { ‘abbreviation’: ‘DAD’, ‘description’: ‘Middle Name’ }
, { ‘abbreviation’: ‘DAE’, ‘description’: ‘Name Suffix’ }
, { ‘abbreviation’: ‘DAF’, ‘description’: ‘Name Prefix’ }
, { ‘abbreviation’: ‘DAG’, ‘description’: ‘Mailing Street Address1’ }
, { ‘abbreviation’: ‘DAH’, ‘description’: ‘Mailing Street Address2’ }
, { ‘abbreviation’: ‘DAI’, ‘description’: ‘Mailing City’ }
, { ‘abbreviation’: ‘DAJ’, ‘description’: ‘Mailing Jurisdiction Code’ }
, { ‘abbreviation’: ‘DAK’, ‘description’: ‘Mailing Postal Code’ }
, { ‘abbreviation’: ‘DAL’, ‘description’: ‘Residence Street Address1’ }
, { ‘abbreviation’: ‘DAM’, ‘description’: ‘Residence Street Address2’ }
, { ‘abbreviation’: ‘DAN’, ‘description’: ‘Residence City’ }
, { ‘abbreviation’: ‘DAO’, ‘description’: ‘Residence Jurisdiction Code’ }
, { ‘abbreviation’: ‘DAP’, ‘description’: ‘Residence Postal Code’ }
, { ‘abbreviation’: ‘DAQ’, ‘description’: ‘License or ID Number’ }
, { ‘abbreviation’: ‘DAR’, ‘description’: ‘License Classification Code’ }
, { ‘abbreviation’: ‘DAS’, ‘description’: ‘License Restriction Code’ }
, { ‘abbreviation’: ‘DAT’, ‘description’: ‘License Endorsements Code’ }
, { ‘abbreviation’: ‘DAU’, ‘description’: ‘Height in FT_IN’ }
, { ‘abbreviation’: ‘DAV’, ‘description’: ‘Height in CM’ }
, { ‘abbreviation’: ‘DAW’, ‘description’: ‘Weight in LBS’ }
, { ‘abbreviation’: ‘DAX’, ‘description’: ‘Weight in KG’ }
, { ‘abbreviation’: ‘DAY’, ‘description’: ‘Eye Color’ }
, { ‘abbreviation’: ‘DAZ’, ‘description’: ‘Hair Color’ }
, { ‘abbreviation’: ‘DBA’, ‘description’: ‘License Expiration Date’ }
, { ‘abbreviation’: ‘DBB’, ‘description’: ‘Date of Birth’ }
, { ‘abbreviation’: ‘DBC’, ‘description’: ‘Sex’ }
, { ‘abbreviation’: ‘DBD’, ‘description’: ‘License or ID Document Issue Date’ }
, { ‘abbreviation’: ‘DBE’, ‘description’: ‘Issue Timestamp’ }
, { ‘abbreviation’: ‘DBF’, ‘description’: ‘Number of Duplicates’ }
, { ‘abbreviation’: ‘DBG’, ‘description’: ‘Medical Indicator Codes’ }
, { ‘abbreviation’: ‘DBH’, ‘description’: ‘Organ Donor’ }
, { ‘abbreviation’: ‘DBI’, ‘description’: ‘Non-Resident Indicator’ }
, { ‘abbreviation’: ‘DBJ’, ‘description’: ‘Unique Customer Identifier’ }
, { ‘abbreviation’: ‘DBK’, ‘description’: ‘Social Security Number’ }
, { ‘abbreviation’: ‘DBL’, ‘description’: ‘Date Of Birth’ }
, { ‘abbreviation’: ‘DBM’, ‘description’: ‘Social Security Number’ }
, { ‘abbreviation’: ‘DBN’, ‘description’: ‘Full Name’ }
, { ‘abbreviation’: ‘DBO’, ‘description’: ‘Last Name’ }
, { ‘abbreviation’: ‘DBO’, ‘description’: ‘Family Name’ }
, { ‘abbreviation’: ‘DBP’, ‘description’: ‘First Name’ }
, { ‘abbreviation’: ‘DBP’, ‘description’: ‘Given Name’ }
, { ‘abbreviation’: ‘DBQ’, ‘description’: ‘Middle Name’ }
, { ‘abbreviation’: ‘DBQ’, ‘description’: ‘Middle Name or Initial’ }
, { ‘abbreviation’: ‘DBR’, ‘description’: ‘Suffix’ }
, { ‘abbreviation’: ‘DBS’, ‘description’: ‘Prefix’ }
, { ‘abbreviation’: ‘DCA’, ‘description’: ‘Virginia Specific Class’ }
, { ‘abbreviation’: ‘DCB’, ‘description’: ‘Virginia Specific Restrictions’ }
, { ‘abbreviation’: ‘DCD’, ‘description’: ‘Virginia Specific Endorsements’ }
, { ‘abbreviation’: ‘DCE’, ‘description’: ‘Physical Description Weight Range’ }
, { ‘abbreviation’: ‘DCF’, ‘description’: ‘Document Discriminator’ }
, { ‘abbreviation’: ‘DCG’, ‘description’: ‘Country territory of issuance’ }
, { ‘abbreviation’: ‘DCH’, ‘description’: ‘Federal Commercial Vehicle Codes’ }
, { ‘abbreviation’: ‘DCI’, ‘description’: ‘Place of birth’ }
, { ‘abbreviation’: ‘DCJ’, ‘description’: ‘Audit information’ }
, { ‘abbreviation’: ‘DCK’, ‘description’: ‘Inventory Control Number’ }
, { ‘abbreviation’: ‘DCL’, ‘description’: ‘Race Ethnicity’ }
, { ‘abbreviation’: ‘DCM’, ‘description’: ‘Standard vehicle classification’ }
, { ‘abbreviation’: ‘DCN’, ‘description’: ‘Standard endorsement code’ }
, { ‘abbreviation’: ‘DCO’, ‘description’: ‘Standard restriction code’ }
, { ‘abbreviation’: ‘DCP’, ‘description’: ‘Jurisdiction specific vehicle classification description’ }
, { ‘abbreviation’: ‘DCQ’, ‘description’: ‘Jurisdiction-specific’ }
, { ‘abbreviation’: ‘DCR’, ‘description’: ‘Jurisdiction specific restriction code description’ }
, { ‘abbreviation’: ‘DCS’, ‘description’: ‘Family Name’ }
, { ‘abbreviation’: ‘DCS’, ‘description’: ‘Last Name’ }
, { ‘abbreviation’: ‘DCT’, ‘description’: ‘Given Name’ }
, { ‘abbreviation’: ‘DCT’, ‘description’: ‘First Name’ }
, { ‘abbreviation’: ‘DCU’, ‘description’: ‘Suffix’ }
, { ‘abbreviation’: ‘DDA’, ‘description’: ‘Compliance Type’ }
, { ‘abbreviation’: ‘DDB’, ‘description’: ‘Card Revision Date’ }
, { ‘abbreviation’: ‘DDC’, ‘description’: ‘HazMat Endorsement Expiry Date’ }
, { ‘abbreviation’: ‘DDD’, ‘description’: ‘Limited Duration Document Indicator’ }
, { ‘abbreviation’: ‘DDE’, ‘description’: ‘Family Name Truncation’ }
, { ‘abbreviation’: ‘DDF’, ‘description’: ‘First Names Truncation’ }
, { ‘abbreviation’: ‘DDG’, ‘description’: ‘Middle Names Truncation’ }
, { ‘abbreviation’: ‘DDH’, ‘description’: ‘Under 18 Until’ }
, { ‘abbreviation’: ‘DDI’, ‘description’: ‘Under 19 Until’ }
, { ‘abbreviation’: ‘DDJ’, ‘description’: ‘Under 21 Until’ }
, { ‘abbreviation’: ‘DDK’, ‘description’: ‘Organ Donor Indicator’ }
, { ‘abbreviation’: ‘DDL’, ‘description’: ‘Veteran Indicator’ }
, { ‘abbreviation’: ‘PAA’, ‘description’: ‘Permit Classification Code’ }
, { ‘abbreviation’: ‘PAB’, ‘description’: ‘Permit Expiration Date’ }
, { ‘abbreviation’: ‘PAC’, ‘description’: ‘Permit Identifier’ }
, { ‘abbreviation’: ‘PAD’, ‘description’: ‘Permit IssueDate’ }
, { ‘abbreviation’: ‘PAE’, ‘description’: ‘Permit Restriction Code’ }
, { ‘abbreviation’: ‘PAF’, ‘description’: ‘Permit Endorsement Code’ }
, { ‘abbreviation’: ‘ZVA’, ‘description’: ‘Court Restriction Code’ }
]
从扫描仪阅读PDF417
如果将驾驶执照复印在纸上，则可以先使用Dynamic Web TWAIN从文档扫描仪将其数字化。
要查看其工作原理，可以在此处的演示中进行尝试。
请注意，该演示还具有文档扫描功能，该功能由Dynamsoft的Web TWAIN SDK提供支持。
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原文链接：https://www.evget.com/article/2021/1/6/39999.html