Operator Reference

HALCON Operator Reference / Legacy / OCR

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ocr_get_featuresT_ocr_get_featuresOcrGetFeaturesOcrGetFeaturesocr_get_features (Operator)

ocr_get_featuresT_ocr_get_featuresOcrGetFeaturesOcrGetFeaturesocr_get_features — Access the features which correspond to a character.

Warning

ocr_get_featuresocr_get_featuresOcrGetFeaturesOcrGetFeaturesocr_get_features is obsolete and is only provided for reasons of backward compatibility. New applications should use the MLP, SVM or CNN based operators instead.

Signature

ocr_get_features(Character : : OcrHandle : FeatureVector)

Herror T_ocr_get_features(const Hobject Character, const Htuple OcrHandle, Htuple* FeatureVector)

void OcrGetFeatures(const HObject& Character, const HTuple& OcrHandle, HTuple* FeatureVector)

HTuple HImage::OcrGetFeatures(const HOCRBox& OcrHandle) const

HTuple HOCRBox::OcrGetFeatures(const HImage& Character) const

static void HOperatorSet.OcrGetFeatures(HObject character, HTuple ocrHandle, out HTuple featureVector)

HTuple HImage.OcrGetFeatures(HOCRBox ocrHandle)

HTuple HOCRBox.OcrGetFeatures(HImage character)

def ocr_get_features(character: HObject, ocr_handle: HHandle) -> Sequence[float]

Description

The operator ocr_get_featuresocr_get_featuresOcrGetFeaturesOcrGetFeaturesocr_get_features calculates the features for the given CharacterCharacterCharactercharactercharacter. The type and number of features is determined by the classifier OcrHandleOcrHandleOcrHandleocrHandleocr_handle. FeatureVectorFeatureVectorFeatureVectorfeatureVectorfeature_vector contains the same values which are used inside operators like traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box or trainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBoxtrainf_ocr_class_box.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

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

Characters to be trained.

OcrHandleOcrHandleOcrHandleocrHandleocr_handle (input_control)  ocr_box → HOCRBox, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

ID of the desired OCR-classifier.

FeatureVectorFeatureVectorFeatureVectorfeatureVectorfeature_vector (output_control)  real-array → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)

Feature vector.

Result

If the parameters are correct, the operator ocr_get_featuresocr_get_featuresOcrGetFeaturesOcrGetFeaturesocr_get_features returns the value 2 ( H_MSG_TRUE) . Otherwise an exception will be raised.

Possible Predecessors

read_ocrread_ocrReadOcrReadOcrread_ocr, reduce_domainreduce_domainReduceDomainReduceDomainreduce_domain, thresholdthresholdThresholdThresholdthreshold, connectionconnectionConnectionConnectionconnection

See also

trainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBoxtrainf_ocr_class_box, traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box

Module

OCR/OCV

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