Empty value of the Strings field in MRZ_TestQuality.

In the response received after document processing, you may see the field MRZTestQuality: Strings with an empty value (as shown in the example below):


"MRZTestQuality": {
  "CHECK_SUMS": 1,
  "CONTRAST_PRINT": 2,
  "DOC_FORMAT": 3,
  "MRZ_FORMAT": 2,
  "PRINT_POSITION": 2,
  "STAIN_MRZ": 2,
  "SYMBOLS_PARAM": 2,
  "StrCount": 0,
  "Strings": [],
  "TEXTUAL_FILLING": 0

Purpose of the Strings Check

The Strings check in MRZTestQuality is designed to evaluate:

Ink consistency across different light spectra (e.g., UV, IR).
MRZ string print quality under varying scanning conditions.

This is useful for:

Authenticity validation of documents in specialized environments.
Quality control of MRZ printing for document-issuing printers.

Important

In Web API contexts, where image processing occurs only in white light, the Strings field will be empty. This is standard behavior and requires no adjustment — the check is not applicable in such scenarios.

Additional Resources

Detailed description of MRZTestQuality parameters in Section 5.3.11 of the Programmer's Guide.

Empty value of the Strings field in MRZ_TestQuality.

Purpose of the Strings Check

Important

Additional Resources

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