Namespace ScanbotSDK.MAUI.Core.GenericDocument
Classes
- CommonFieldTypeConverter
Common field types.
- Field
Generic document field.
- FieldDataFormatConverter
Type of parsing applied to field.
- FieldParsedData
Parsed data.
- FieldType
Generic Document Type.
- FieldValidationStatusConverter
Field validation status.
Optical character recognition (OCR) invariably introduces errors in the recognized text. There are numerous ways to verify that what has been recognized is, in fact, what was written in the document.
The best way to validate the value of a field is for it to have a known format or validation logic. For example, an IBAN number has a known format and two check digits that make it very unlikely that a value with OCR errors will pass validation. Fields with known validation rules will have a validation status of either VALID or INVALID.
Fields whose value can be inferred from other fields, or from domain knowledge (for example, the field may have the same value in every instance of this type of document), will have the status INFERRED. Inferring the value of a field is a strong validation method, provided that there are no unexpected changes to the document format.
Fields that do not have validation rules and cannot be inferred can still be validated by checking whether the same value is recognized from multiple attempts, e.g. across multiple frames of a camera stream. If the same value is recognized in multiple frames, the value is considered CONFIRMED, otherwise it will have the status NONE. This is the least strict validation method, as it does not protect from systemic OCR errors, but in practice it still provides good results for most fields.
- GenericDocument
Generic document.
- GenericDocumentType
Generic Document Type.
- OcrResult
Result of OCR text recognition.