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Why Are Recognition Results of OCR Inaccurate?

The OCR recognition results may be inaccurate due to the following causes:
  1. The image format is not supported.

    Only images in PNG, JPEG, BMP, or TIFF format can be recognized.

  2. The image is too small to recognize.

    For details about constraints on the image size of each service, see section "Constraints."

  3. The image quality is poor. For example, the image is too dark to recognize.
  4. The image style is incorrect.

    Only special VAT invoices and plain VAT invoices (including electronic invoices) can be recognized. However, volume invoices and toll invoices are not included.

  5. If error code is returned, locate the fault according to the error code.

    For details about error code, see the Optical Character Recognition API Reference.

Parent topic: API