Release Notes for .Net - 1.x

1.2.1 (06/08/2021)

New

• Added a new property products to DMLTSConnectionParameters.
• Added a new enumeration EnumProduct.

Fixed

• Fixed a bug of license client.

1.2 (05/18/2021)

New

• Added a new parameter LabelRecognitionParameter.Timeout. Should the recognition time pass the value of this parameter, a new error code DLRERR_RECOGNITION_TIMEOUT will be returned.

• Added a new parameter LabelRecognitionParameter.Pages that specifies a page or a subset of pages of a single file to run the recognition process on.

• Added the following error codes: DLRERR_TIFF_READ_FAILED , DLRERR_PDF_READ_FAILED and DLRERR_PDF_DLL_MISSING. These error codes will be returned when the recognizer fails to read a TIFF file, a PDF file, or if the PDF DLL is missing, respectively.

• Added a new property PageNumber to DLR_Result to identify the page on which the result is located.

• Added parameters TextStringLengthRange and LineStringLengthRange that can be used to define the minimum and maximum string length when running the recognition process on a text area or a specific line, respectively. They are available as:
  • LabelRecognitionParameter.TextStringLengthRange
  • LabelRecognitionParameter.LineStringLengthRange
  • TextArea.TextStringLengthRange
  • TextArea.LineStringLengthRange
  • LineSpecification.LineStringLengthRange
• Added a new parameter MaxLineCharacterSpacing to limit the spacing between characters treated as one line. They are available as:
  • LabelRecognitionParameter.MaxLineCharacterSpacing
  • TextArea.MaxLineCharacterSpacing

• Added parameters LineSpecification.FirstPoint, LineSpecification.SecondPoint, LineSpecification.ThirdPoint, and LineSpecification.FourthPoint to specify the coordinates of a line.

• Added a new API AppendSettingsFromFile to allow appending settings directly from a JSON file.

Improved

• Improved the recognition performance.

• Improved the regular expression parameter by supporting more RegEx pattern syntaxes.

• Improved the recognition accuracy when dealing with skewed and italics characters.

• Improved the recognition accuracy for serif fonts.

1.0 (02/24/2021)

• Supports recognition of A-Z, a-z, 0-9, ., -, _, (blank space), / and : characters.
• Supports text recognition from BMP, JPEG, PNG and single-page TIFF files.
• Supports zonal OCR and provides three ways to localize text areas:
  • Pre-define an area manually in pixel or percentage.
  • Specify an area relative to the barcode zone, which allows you to recognize accompanying texts near the barcode.
  • Specify an area relative to blocks which share the same colour or uses the same font colour. A common example would be a price tag, where the text of interest is always on a yellow square background, the yellow square can serve as the reference region.
• Supports specifying a regular expression to improve recognition accuracy and robustness.