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Document structures

Document structures

Many functions of the Passport Reader system return Document structures as results. The layout of these structures is similar but their exact content depends on the individual functions and the value of some properties. Logically the elements of these structures can be grouped into three levels.

General document elements

Frame elements

Controller elements

Ocr Quality Assurance elements

Other elements

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Document structure

Optical Recognition Functions

There are several functions involving Optical Recognition in the Passport Reader system.
The Recognize function is the most complex one. It recognizes the previously defined document types, and returns full result.
The GetMrz function reads ICAO standard MRZ only. It runs faster than the Recognize function in simpler case. If the mrz quality check option is used, the GetMrz gives back the Ocr Quality Assurance elements.
The GetOcr function can be used to read data without document processing. With this function the Field elements are by-passed and the Ocr elements are computed. This function can be used with ocr parameters. Without these parameters the document will be read as one of the defined document types. The ocr parameters have to be organized into Ocr Parameters structure.
The GetBarcode function reads barcodes. If the structure of the read barcode is recognized, then it will be parsed into Field elements too. E.g. the parsing of personal data found in AAMVA barcodes.


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