Release Notes - C++ 3.x

3.2.20 (04/07/2024)

Highlights

• Added confusable character distinguishing: this feature enhances the library’s ability to distinguish between common confusable character sets including {0, o, O}, {1, I, l}, and {5, s, S}, across popular fonts like Arial, Times New Roman, and Verdana, etc.
• Supported confusable character set customization: leveraging the new caching mechanism in the CaptureVisionRouter (CVR) module, the library now enables users to customize confusable character sets to meet the needs of specific scenarios.

Changelogs

Improved

• Improved the speed of TextLineGroup detection by optimizing internal logic.

New

• Added new APIs for users to obtain the cached character items and the character clusters:
  • A new class CBufferedCharacterItemSet to represent a collection of buffered character items and cluster information.
  • A new class CBufferedCharacterItem to represent a basic item of the buffered characters with its image and features information.
  • A new class CCharacterCluster to represent a character cluster generated from the collected buffered character items.
  • Added a new class CBufferedItemsManager to manage the buffered character items.
  • Added a new method GetBufferedItemsManger to get an object of CBufferedItemsManager.
• Added new LabelRecognizerTaskSettings parameters.
  • Added ConfusableCharactersPath to define the path of the resource files that store the confusable characters’ information.
  • Added ClusterSamplesCountThreshold to specify the lowest required sample count for clustering.
• Added new TextLineSpecification parameters.
  • Added ConfusableCharactersCorrection to define which confusable characters you are going to distinguish. You can also specify the font type of the characters.
  • Added ExpectedGroupCount to define the count of TextLineGroups that might exist on the image.
• Added a new method GetSpecificationName to the CTextLineResultItem class to get the name of the TextLineSpecificationobject that generated this CTextLineResultItem.
• Added a new method GetSpecificationName to the CRecognizedTextLineElement class to get the name of the TextLineSpecificationobject that generated this CRecognizedTextLineElement.
• Added a new error code EC_PDF_LIBRARY_LOAD_FAILED.

3.2.10 (03/01/2024)

Improved

• Security update for DynamsoftLabelRecognizer library and other corresponding libraries.
• Supported multiple instances of the class CCaptureVisionRouter.
• Supported the filter configuration of the characters that are not recognized by the Deep Neural Network via the Filter.txt file.
• Improved the usage count logic of the concurrent license mode.
• Improved the experience of local cache usage when failing to connect the license server. The renewal of the local cache is optimized as well.

New

• Added new error codes:
  • EC_RESULT_TYPE_MISMATCH_IRREPLACEABLE
  • EC_LICENSE_CACHE_USED
• Added a virtual destructor to the interface CImageSourceErrorListener to prevent memory leaks.
• Added a new function GetRecognizedTextLinesResult to the CCapturedResult class to get all the result items with the type CRIT_TEXT_LINE.
• Added new virtual destructors to the following interfaces to prevent memory leaks.
  • CCaptureStateListener
  • CImageSourceStateListener

Changed

• Changed the internal logic of the function SetResultUnitTypesOnlyForInput of ObservationParameters. The function only takes effect when the callback of the specified result unit is implemented.

Fixed

• Fixed a crash bug of the Replace method of the IntermediateResultUnit class. The method will return the error code EC_RESULT_TYPE_MISMATCH_IRREPLACEABLE when the result type is mismatched.
• Fixed a bug where error messages are not output when parsing the parameter templates.
• Fixed a bug where multiple results were output from the same text area.
• Fixed a bug where the capture might be blocked due to the network latency.
• Fixed a bug where the DetectAndNormalizeDocument task might be approved without a valid license.
• Fixed the bugs of usage count.
  • Count twice for a single PDF417 barcode when a code parser task is implemented on the result.
  • The barcode decoding result might not be uploaded timely.
  • The usage count of text line recognition might be double counted when the intermediate results are output.
  • The document boundary detection result might be miscounted.
  • Patchcode might be counted even if there is no Patchcode license item.

3.2.0 (01/16/2024)

Highlights

• Introduced the capability for users to influence the image processing process by altering intermediate results. Users can now clone, edit, and substitute intermediate result units within the callback function of each type. Subsequent operations will then proceed based on the updated unit.
• Introduced a feature for multi-condition filtering across products. Users can now specify filtering criteria for the task results of a TargetROIDef by implementing an OutputTaskSetting based on the task results of varying products from descendant TargetROIDef objects.
• Enhanced the Offset parameter in TargetROIDef. Users now have the capability to meticulously customize components of the coordinate system, including the origin, X-axis, and Y-axis, for precise offset calculation.
• Introduced a feature for grouping text lines. A text line group consists of spatially adjacent lines of text. Through the TextLineSpecification parameters, users can now do two things:
  • Put text lines in groups and also define the spatial relationship between different groups;
  • Specify whether to concatenate text line results within a group, how to do the concatenation and whether to output the concatenated result.

Changelogs

New

• Updated the template system
  • Added StringLengthRange for TextDetectionMode.
  • Added ReferenceTaskNameArray under Location.ReferenceObjectFilter to filter the reference objects generated by the task name.
  • Added the support of the OutputTaskSetting definition. The following subparameters are available in OutputTaskSetting object:
    • OutputCondition
    • TaskResultArray
    • TargetROIDefName
    • TaskSettingNameArray
    • BackwardReferenceOutput
    • ReferenceTaskNameArray
    • ReferenceResultTypeArray
    • Operator
  • Updated TextLineSpecification to support text line group definition. Added the following subparameters:
    • OutputResults
    • ConcatResults
    • ConcatSeparator
    • ConcatStringLengthRange
    • ConcatStringRegExPattern
    • ReferenceGroupName
    • TextLinesCount
    • SubGroups
  • Offset parameter is optimized.
    • Added ReferenceObjectType to specify whether the reference object is an atomic object or the whole image.
    • Added ReferenceXAxis & ReferenceYAxis to define the X & Y axis.
    • Modified FirstPoint, SecondPoint, ThirdPoint & FourthPoint. You can specify whether the X or Y coordinate of the point is measured by percentage.
    • Deprecated ReferenceObjectSize Type.
• The following classes are migrated from DynamsoftCore module to the DynamsoftCaptureVisionRouter module:
  • CIntermediateResultReceiver
  • CapturedResultReceiver
  • CapturedResultFilter
  • CIntermediateResultManager
• Added a new class back method OnShortLinesUnitReceived to the CIntermediateResultReceiver class.
• Added a new class CAbstractIntermediateResultReceiver. It is the super class of the CIntermediateResultReceiver.
• Added methods PauseCapturing and ResumeCapturing. Two new CapturedState members, CS_PAUSED and CS_RESUMED, are added as well.
• Added a new property documentSettings to struct SimplifiedCaptureVisionSettings. The corresponding struct SimplifiedDocumentNormalizerSettings is added to the DynamsoftDocumentNormalizer module to store the documentSettings.
• Added the following methods to the CObservationParameters class to specify the input only result unit.
  • SetResultUnitTypesOnlyForInput
  • GetResultUnitTypesOnlyForInput
  • IsResultUnitTypeOnlyForInput
• Added the following methods to the CRegionObjectElement class to support the intermediate result modification.
  • SetLocation
  • Clone
  • Retain
  • Release
• Added a new method Replace to the CIntermediateResultUnit class to support the replacement of intermediate result units.
• Added SetImageData methods to the following classes:
  • CCapturedResult
  • CCapturedResultItem
  • CRegionObjectElement
  • CIntermediateResultUnit
  • CLocalizedTextLineElement
  • CLocalizedTextLinesUnit
  • CRecognizedTextLineElement
  • CRecognizedTextLinesUnit
  • CRecognizedTextLinesResult
• Added new methods to the CPredetectedRegionsUnit class to add, remove or set the predetected regions.
• Added new methods to the CLineSegmentsUnit class to add, remove or set the line segments.
• Added new methods to the CTextZonesUnit class to add, remove or set the text zones. Added a new class CTextZone to store the information of a single text zone.
• Added a new method SetContours to the CContourUnit class.
• Added new methods to the CTextureDetectionResultUnit class to set the X & Y spacing.
• Added a new intermediate result unit, CShortLinesUnit, to output the detected short lines. The corresponding enumeration member IRUT_SHORT_LINES is added to the IntermediateResultUnitType.
• Added the following methods to the CCapturedResultItem class
  • GetTargetROIDefName
  • GetTaskName
  • Retain
  • Release
• Added the following new error codes
  • EC_IMAGE_SIZE_NOT_MATCH
  • EC_IMAGE_PIXEL_FORMAT_NOT_MATCH
  • EC_SECTION_LEVEL_RESULT_IRREPLACEABLE
  • EC_AXIS_DEFINITION_INCORRECT
  • EC_TEXT_LINE_GROUP_LAYOUT_CONFLICT
  • EC_TEXT_LINE_GROUP_REGEX_CONFLICT
• Added the following methods to the CCapturedResult class.
  • A new override constructor.
  • Retain
  • Release
• Updated CImageData class
  • Change the return value of GetBytesLength from int to unsigned long long.
  • Added a new constructor.
• Added a new supported image pixel format, binary 8 inverted. The corresponding enumeration member is added to the ImagePixelFormat.
• Added return value for the Retain method of the CIntermediateResultUnit class. The method will return the pointer of the current CIntermediateResultUnit.
• Added a new method CreatePredetectedRegionElement to the CImageProcessingModule class to create the predetected region element.
• Added new methods to the CLocalizedTextLinesUnit class to add, set or remove the localized text line elements.
• Added new methods to the CRecognizedTextLinesUnit class to add, set or remove the recognized text line elements.
• Added the following methods to the CRecognizedTextLineElement class
  • A new constructor (the old one is removed)
  • SetText
• Added a new constructor to the CTextLineResultItem class to replace the previous one.
• Added the following methods to the CrecognizedTextLinesResult class.
  • A new constructor
  • Retain
  • Release
• Added the following methods to the CLabelRecognizerModule class to create the corresponding elements.
  • CreateRecognizedTextLineElement
  • CreateLocalizedTextLineElement

Fixed

• Fixed a crash bug that might happen when triggering the SetNextImageToReturn method of the ImageSourceAdapter class.

Break Changes

• Changed the logic of the StopCapturing method.
  • CaptureResultReceiver will not receive results after StopCapturing is triggered with waitForRemainingTasks false.
  • Support stop capturing after the PauseCapturing method is triggered.
• Changed the logic of the capturedResultItemTypes setting of SimplifiedCaptureVisionSettings:
  • If the result item types don’t match the specified template, the method UpdateSettings will return the error code EC_PARAMETER_VALUE_INVALID with the message “The captured result item types do not match the task configurations in the template”.
  • Based on the capturedResultItemTypes setting, the irrelevant tasks will be removed from the template.
  • The capturedResultItemTypes should include at least one of the CRIT_BARCODE, CRIT_TEXT_LINE, CRIT_DETECTED_QUAD, CRIT_NORMALIZED_IMAGE. Otherwise, the method UpdateSettings will return the error code EC_PARAMETER_VALUE_INVALID with the message “ The captured result item types should contain at least one task result type “.
• Refactored the CContour class. Please view API reference - CContour class for more information.
• The destructor functions of the following classes are changed to protected:
  • CCandidateQuadEdgesUnit
  • CCornersUnit
  • CDetectedQuadElement
  • CDetectedQuadsUnit
  • CLongLinesUnit
  • CNormalizedImageElement
  • CNormalizedImageUnit
  • CNormalizedImagesResult
  • CDetectedQuadsResult
• Change the compiler option of the runtime library of Windows DLLs from MD to MT.
• The DeepNeuralNetwork module is separated from the DynamsoftImageProcessing module.

3.0.30 (02/01/2024)

New

• Added internal logic to obtain resources based on the specified template.

Fixed

• Small fixes and tweaks in the license module.

3.0.20 (10/26/2023)

New

• Added the following preset templates:
  • PT_READ_BARCODES_SPEED_FIRST
  • PT_READ_BARCODES_READ_RATE_FIRST
  • PT_READ_BARCODES_BALANCED
  • PT_READ_SINGLE_BARCODE
  • PT_READ_DENSE_BARCODES
  • PT_READ_DISTANT__BARCODES
  • PT_RECOGNIZE_NUMBERS
  • PT_RECOGNIZE_LETTERS
  • PT_RECOGNIZE_NUMBERS_AND_LETTERS
  • PT_RECOGNIZE_NUMBERS_AND_UPPERCASE_LETTERS
  • PT_RECOGNIZE_UPPERCASE_LETTERS
• Added parameter Page to ImageSource object.
• Added a new method SetPages to the class CDirectoryFetcher and class CFileFetcher.
• Added a new parameter scaleDownThreshold to the struct SimplifiedLabelRecognizerSettings.
• Added CImageSourceErrorListener to receive the errors from an image source.
• Added method SetErrorListener to class CImageSourceAdapter to add the CImageSourceErrorListener.
• Added a new parameter minImageCaptureInterval which can be set via the struct SimplifiedCaptureVisionSettings or the CaptureVisionTemplate object of a JSON template file.
• Added “UNKNOWN” as a supported value of the TextDetectionMode.Direction parameter. Changed the default value of Direction to “UNKNOWN”.
• Added the following error codes:
  • EC_FILE_ALREADY_EXISTS
  • EC_CREATE_FILE_FAILED
  • EC_IMGAE_DATA_INVALID

Improved

• The class CDirectoryFetcher and CFileFetcher will be able to return error codes via CImageSourceErrorListener
• Updated the error codes of the method SaveToFile of the class CImageManager.
• Optimize the logic to support calling CIntermediateResultManager.AddResultReceiver and CIntermediateResultManager.RemoveResultReceiver after StartCapturing.
• Added ability to output all templates via methods OutputSettings and OutputSettingsToFile by specifying “*” for the parameter templateName.

Fixed

• Small fixes and tweaks.

Changed

• Changed the upper limit to the DuplicateForgetTime, which is 3 minutes.
• Changed the timing of OnOriginalImageResultReceived so that it is triggered immediately after receiving the image.
• Changed the constructors of the following classes from public to protected.
  • CImageTag
  • CCapturedResultReceiver
  • CCapturedResultFilter
  • CImageSourceAdapter
  • CProactiveImageSourceAdapter
  • CIntermediateResultUnit
  • CIntermediateResultReceiver
• Remove const modifiers of all callback methods of class CCapturedResultReceiver and class CIntermediateResultReceiver.

3.0.10 (08/08/2023)

New

• Added a new class CVector4 in the core module.

• Added new methods SetTransformMatrix and GetTransformMatrix to the class CIntermediateResultUnit. Enumeration TransformMatrixType is also added to support users specifying the type of the target matrix.

• Added enumeration RasterDataSource to specify the raster data source when reading PDF files. The previous enumeration TargetType is removed. The attribute TargetType type of Class CPDFReadingParameter is replaced by RasterDataSource rasterDataSource.

• Added method GetContours to the CContourUnit class to get all the CContour objects contained in the unit and their hierarchies.

Improved

• Improved the implementation of the StopCapturing method to prevent deadlock when invoked in the management thread.

Fixed

• Fixed crash bugs that happen in rare cases.

• Fixed a bug where the local license is not successfully updated when initialing the license again.

Changed

• Changed the parameters and the return value of the method GetLineSegment of CLineSegmentsUnit class. The method will require an index value as the parameter and return a CLineSegment object as the return value.

• Changed the structure of class CPoint.

• Renamed method GetRawImage to GetOriginalImage.

• Renamed method GetSourceImageHashId to GetOriginalImageHashId. This change applies to the following classes:

  • CIntermediateResultUnit

  • CCapturedResult

  • CRecognizedTextLinesResult

• Renamed method GetSourceImageTag to GetOriginalImageTag. This change applies to the following classes:

  • CIntermediateResultUnit

  • CCapturedResult

  • CRecognizedTextLinesResult

• Renamed methods GetCount to GetItemsCount. This change applies to the following classes:

  • CCapturedResult

  • CRecognizedTextLinesResult

• Renamed an enumeration member of CapturedResultItemType from CRIT_RAW_IMAGE to CRIT_ORIGINAL_IMAGE.

• Renamed a method of CapturedResultReceiver from OnRawImageResultReceived to OnOriginalImageResultReceived.

• Renamed a method of CapturedResultFilter from OnRawImageResultReceived to OnOriginalImageResultReceived.

• Renamed the class CRawImageResultItem to COriginalImageResultItem.

• Renamed an enumeration member of BufferOverflowProtectionMode from BOPM_APPEND to BOPM_UPDATE.

• The following methods are renamed:

  • Renamed EnableResultVerification to EnableResultCrossVerification.

  • Renamed isResultVerificationEnable to isResultCrossVerificationEnabled.

  • Renamed EnableDuplicateFilter to EnableResultDeduplication.

  • Renamed isDuplicateFilterEnabled to isResultDeduplicationEnabled.

• Renamed parameter CornerAngleRangeArray to CornerAngleRange. The range of the sub parameter MinValue is restricted to [0,90] and the range of MaxValue is restricted to [90,180].

Removed

• Removed Set/GetLocalToSourceImageTransformMatrix methods from CIntermediateResultUnit class.

• Removed Set/GetRotationTransformMatrix methods from CIntermediateResultUnit class.

• Removed methods GetCount and GetContour from CContourUnit class. Use the method GetContours instead.

3.0.0 (07/04/2023)

DynamsoftLabelRecognizer SDK has been revamped to integrate with DynamsoftCaptureVision (DCV) architecture, which is newly established to aggregate the features of functional products powered by Dynamsoft. The features are designed to be pluggable, customizable and interactable. In addition, the functional products share the computation so that their processing speed is much higher than working individually.

• DynamsoftCaptureVision architecture consists of:
  • ImageSourceAdapter(ISA), the standard input interface for you to convert image data from different sources into the standard input image data. In addition, ISA incorporates an image buffer management system that allows instant access to the buffered image data.
  • CaptureVisionRouter (CVR), an engine for you to update templates, retrieve images from ISA, coordinate corresponding functional products and dispatch the results to the receivers.
  • Functional products that perform image processing, content understanding and semantic processing. The functional products are pluggable and passively called by CVR when they are required.
  • Result receiver interfaces. You can implement CapturedResultReceiver (CRR) to receive the CapturedResults that output when the processing on an image is finalized. You can also implement IntermediateResultReceiver (IRR) to get timely results from different stages of the workflow.
• The parameter template system has been comprehensively upgraded.
  • Multiple algorithm task settings are available. You can define barcode decoding, label recognizing, document scanning and semantic processing tasks in one template file.
  • Extended the feature of the ROI system. By configuring the target ROI parameters, you can not only specify an ROI on the original image but also define the dependencies of the algorithm tasks. This feature enables you to customize the workflow when processing complex scenarios.
  • The image processing parameters are separated from the task parameters so that the template settings become more clear and concise.
• The intermediate result system has been improved.
  • Achieved the intermediate result sharing between different functional products. The results that have the same image source and processing parameters are directly reused, which speeds up the image processing workflow. You don’t need to add any additional code to enable the intermediate result sharing. The library can recognize all the reusable results automatically based on the template file you uploaded.
  • The readability and interactivity of the intermediate results are enhanced. IntermediateResultReceiver allows you to receive up to 27 different types of Intermediate results. You can clearly read which stage of the algorithm each result is output from. In addition, IntermediateResultManager allows you to intervene in the workflows by modifying the intermediate results.