Release Notes - .Net 2.x

2.0 (08/26/2021)

Highlights

• Added image processing modes to enhance the usage scenarios like MRZ reading:
  • Texture area detection
  • Color Conversion
  • Binarization
  • Grayscale image processing

• Added dictionary-based correction. The dictionary is minimal and customizable to only cover a scenario-oriented vocabulary.

• Improved the overall performance by replacing Caffe engine with OpenCV dnn engine

• Improved the readability of recognizing skewed characters.

• Improved the MRZ reading performance.

• Added a core library. Migrated the core structs/classes from the LabelRecognizer library to the core library.

Changelog

New

• Added auto-deskew algorithm to improve the performance on recognizing the skewed characters.
• Added library Dynamsoft.Core.dll. Migrated the Dynamsoft core classes/enums from library Dynamsoft.LabelRecognizer.dll and DynamsoftCommon.dll to library Dynamsoft.Core.dll.
• Added class BarcodeResult for users to interact with Dynamsoft Barcode Reader SDK.
• Added DLR_RuntimeSettings property DictionaryPath and DictionaryCorrectionThreshold for users to further improve the recognizing accuracy by referencing dictionary files.
• Added class DLR_DictionaryCorrectionThreshold.
• Added class DLR_FurtherModes and property DLR_RuntimeSettings.FurtherModes for users to config more processing modes.
• Added enumeration TextureDetectionMode and property DLR_FurtherModes.TextureDetectionModes for users to detect and remove the texture background.
• Added enumeration ColourConversionModes and property DLR_FurtherModes.ColourConversionModes for users to convert color images to grayscale images in differenct ways.
• Added enumeration BinarizationMode and property DLR_RuntimeSettings.BinarizationModes for users to convert grayscale images to binary images in different ways.
• Added enumeration GrayscaleEnhancementMode and property DLR_FurtherModes.GrayscaleEnhancementModes for users to enable grayscale images preprocessing.
• Added CharacterHConfidence, CharacterMConfidence and CharacterLConfidence properties in DLR_CharacterResult class so that more alternative results will be available for users.

Improved

• Improved the neural network performance by replacing Caffe engine with OpenCV DNN engine.

Fixed

• Fixed a bug that might cause wrong line number matching when using LineSpecification.LineNumber.

API Changes

• Modified the InitLicense(string) to static InitLicense(string).
• Modified the parameter type of the method UpdateReferenceRegionFromBarcodeResults from TextResult[] to BarcodeResult[].
• Modified the parameters LabelRecognizerParameter.LetterHeightRange and TextArea.LetterHeightRange. The value unit of the parameters are modified from percentage to thousandth. The available range of the value and the default value are updated as well.
• Renamed class LabelRecognition to LableRecognizer.
• Renamed exception DLR_Exception to LabelRecognizerException.
• Removed method InitLicenseFromLTS.
• Removed method InitLTSConnectionParameters.
• Removed class DMLTSConnectionParameters.