Passport recognition settings

Aspose.OCR for .NET allows for very flexible customization of passport recognition accuracy, performance, and other settings by configuring the properties of the PassportRecognitionSettings object.

These settings are specifically tailored for processing scanned or photographed passports.

Setting	Type	Default value	Description
AllowedSymbols	string	All characters of the selected language	The whitelist of characters Aspose.OCR engine will look for.
IgnoredSymbols	string	none	A blacklist of characters that are ignored during recognition.
Language	Aspose.OCR.Language	Aspose.OCR.Language.None	Specify a language for recognition.
ThreadsCount	integer	auto	The number of CPU threads used for recognition.
AutomaticColorInversion	boolean	true	Improve recognition accuracy of white text on a dark/black background. If you are not optimizing every aspect of recognition (for example, for online applications or entry-level devices), leave this setting set to true.
Country	Aspose.OCR.Country	NONE	Extract key passport details (such as a number, name, date of birth, and so on) for the specific country in addition to the entire passport text. See Supported countries section below.

Supported countries

A list of countries for retrieving specific details (such as a number, name, date of birth, and so on) from passport images:

Value	Country
Aspose.OCR.Country.NONE	Do not parse passport details (only recognize passport text).
Aspose.OCR.Country.MADAGASCAR	Parse Malagasy passports.
Aspose.OCR.Country.USA	Parse US passports.

Applicable to

• Extracting text from a passport

Example

The following code example shows how to fine-tune passport recognition:

Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
// Add images to OcrInput object
Aspose.OCR.OcrInput input = new Aspose.OCR.OcrInput(Aspose.OCR.InputType.SingleImage);
input.Add("passport1.png");
input.Add("passport2.png");
// Recognition settings
Aspose.OCR.PassportRecognitionSettings recognitionSettings = new Aspose.OCR.PassportRecognitionSettings();
recognitionSettings.Language = Aspose.OCR.Language.ExtLatin;
// Recognize passports
Aspose.OCR.OcrOutput results = recognitionEngine.RecognizePassport(input, recognitionSettings);
foreach(Aspose.OCR.RecognitionResult result in results)
{
	Console.WriteLine(result.RecognitionText);
}