Operator Reference

HALCON Operator Reference / OCR / Support Vector Machines
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do_ocr_multi_class_svmT_do_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm (Operator)

do_ocr_multi_class_svmT_do_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm — Classify multiple characters with an SVM-based OCR classifier.

Signature

do_ocr_multi_class_svm(Character, Image : : OCRHandle : Class)

Herror T_do_ocr_multi_class_svm(const Hobject Character, const Hobject Image, const Htuple OCRHandle, Htuple* Class)

void DoOcrMultiClassSvm(const HObject& Character, const HObject& Image, const HTuple& OCRHandle, HTuple* Class)

HTuple HRegion::DoOcrMultiClassSvm(const HImage& Image, const HOCRSvm& OCRHandle) const

HTuple HOCRSvm::DoOcrMultiClassSvm(const HRegion& Character, const HImage& Image) const

static void HOperatorSet.DoOcrMultiClassSvm(HObject character, HObject image, HTuple OCRHandle, out HTuple classVal)

HTuple HRegion.DoOcrMultiClassSvm(HImage image, HOCRSvm OCRHandle)

HTuple HOCRSvm.DoOcrMultiClassSvm(HRegion character, HImage image)

def do_ocr_multi_class_svm(character: HObject, image: HObject, ocrhandle: HHandle) -> Sequence[str]

def do_ocr_multi_class_svm_s(character: HObject, image: HObject, ocrhandle: HHandle) -> str

Description

do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm computes the best class for each of the characters given by the regions CharacterCharacterCharactercharactercharacter and the gray values ImageImageImageimageimage with the SVM-based OCR classifier OCRHandleOCRHandleOCRHandleOCRHandleocrhandle and returns the classes in ClassClassClassclassValclass. In contrast to do_ocr_single_class_svmdo_ocr_single_class_svmDoOcrSingleClassSvmDoOcrSingleClassSvmdo_ocr_single_class_svm, do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm can classify multiple characters in one call, and therefore typically is faster than a loop that uses do_ocr_single_class_svmdo_ocr_single_class_svmDoOcrSingleClassSvmDoOcrSingleClassSvmdo_ocr_single_class_svm to classify single characters. However, do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm can only return the best class of each character. Before calling do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm, the classifier must be trained with trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvmtrainf_ocr_class_svm.

Execution Information

  • Multithreading type: reentrant (runs in parallel with non-exclusive operators).
  • Multithreading scope: global (may be called from any thread).
  • Automatically parallelized on tuple level.

Parameters

CharacterCharacterCharactercharactercharacter (input_object)  region(-array) → objectHRegionHObjectHObjectHobject

Characters to be recognized.

ImageImageImageimageimage (input_object)  singlechannelimage → objectHImageHObjectHObjectHobject (byte / uint2)

Gray values of the characters.

OCRHandleOCRHandleOCRHandleOCRHandleocrhandle (input_control)  ocr_svm → HOCRSvm, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Handle of the OCR classifier.

ClassClassClassclassValclass (output_control)  string(-array) → HTupleSequence[str]HTupleHtuple (string) (string) (HString) (char*)

Result of classifying the characters with the SVM.

Result

If the parameters are valid the operator do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvmdo_ocr_multi_class_svm returns the value 2 ( H_MSG_TRUE) . If necessary, an exception is raised.

Possible Predecessors

trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvmtrainf_ocr_class_svm, read_ocr_class_svmread_ocr_class_svmReadOcrClassSvmReadOcrClassSvmread_ocr_class_svm

Alternatives

do_ocr_single_class_svmdo_ocr_single_class_svmDoOcrSingleClassSvmDoOcrSingleClassSvmdo_ocr_single_class_svm

See also

create_ocr_class_svmcreate_ocr_class_svmCreateOcrClassSvmCreateOcrClassSvmcreate_ocr_class_svm, classify_class_svmclassify_class_svmClassifyClassSvmClassifyClassSvmclassify_class_svm

Module

OCR/OCV

ClassesClasses | | Operators