Operator Reference

HALCON Operator Reference / OCR / Support Vector Machines

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get_support_vector_ocr_class_svmT_get_support_vector_ocr_class_svmGetSupportVectorOcrClassSvmGetSupportVectorOcrClassSvmget_support_vector_ocr_class_svm (Operator)

get_support_vector_ocr_class_svmT_get_support_vector_ocr_class_svmGetSupportVectorOcrClassSvmGetSupportVectorOcrClassSvmget_support_vector_ocr_class_svm — Return the index of a support vector from a trained OCR classifier that is based on support vector machines.

Signature

get_support_vector_ocr_class_svm( : : OCRHandle, IndexSupportVector : Index)

Herror T_get_support_vector_ocr_class_svm(const Htuple OCRHandle, const Htuple IndexSupportVector, Htuple* Index)

void GetSupportVectorOcrClassSvm(const HTuple& OCRHandle, const HTuple& IndexSupportVector, HTuple* Index)

double HOCRSvm::GetSupportVectorOcrClassSvm(const HTuple& IndexSupportVector) const

static void HOperatorSet.GetSupportVectorOcrClassSvm(HTuple OCRHandle, HTuple indexSupportVector, out HTuple index)

double HOCRSvm.GetSupportVectorOcrClassSvm(HTuple indexSupportVector)

def get_support_vector_ocr_class_svm(ocrhandle: HHandle, index_support_vector: Sequence[int]) -> float

Description

The operator get_support_vector_ocr_class_svmget_support_vector_ocr_class_svmGetSupportVectorOcrClassSvmGetSupportVectorOcrClassSvmget_support_vector_ocr_class_svm maps support vectors of a trained SVM-based OCR classifier (given in OCRHandleOCRHandleOCRHandleOCRHandleocrhandle) to the original training data set. The index of the SV is specified with IndexSupportVectorIndexSupportVectorIndexSupportVectorindexSupportVectorindex_support_vector. The index is counted from 0, i.e., IndexSupportVectorIndexSupportVectorIndexSupportVectorindexSupportVectorindex_support_vector must be a number between 0 and NumSupportVectorsNumSupportVectorsNumSupportVectorsnumSupportVectorsnum_support_vectors - 1, where NumSupportVectorsNumSupportVectorsNumSupportVectorsnumSupportVectorsnum_support_vectors can be determined with get_support_vector_num_ocr_class_svmget_support_vector_num_ocr_class_svmGetSupportVectorNumOcrClassSvmGetSupportVectorNumOcrClassSvmget_support_vector_num_ocr_class_svm. The index of this SV in the training data is returned in IndexIndexIndexindexindex. get_support_vector_ocr_class_svmget_support_vector_ocr_class_svmGetSupportVectorOcrClassSvmGetSupportVectorOcrClassSvmget_support_vector_ocr_class_svm can, for example, be used to visualize the support vectors. To do so, the train file that has been used to train the SVM must be read with read_ocr_trainfread_ocr_trainfReadOcrTrainfReadOcrTrainfread_ocr_trainf. The value returned in IndexIndexIndexindexindex must be incremented by 1 and can then be used to select the support vectors with select_objselect_objSelectObjSelectObjselect_obj from the training characters. If more than one train file has been used in trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvmtrainf_ocr_class_svm IndexIndexIndexindexindex behaves as if all train files had been merged into one train file with concat_ocr_trainfconcat_ocr_trainfConcatOcrTrainfConcatOcrTrainfconcat_ocr_trainf.

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

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

OCR handle.

IndexSupportVectorIndexSupportVectorIndexSupportVectorindexSupportVectorindex_support_vector (input_control)  integer-array → HTupleSequence[int]HTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Number of stored support vectors.

IndexIndexIndexindexindex (output_control)  real → HTuplefloatHTupleHtuple (real) (double) (double) (double)

Index of the support vector in the training set.

Result

If the parameters are valid the operator get_support_vector_ocr_class_svmget_support_vector_ocr_class_svmGetSupportVectorOcrClassSvmGetSupportVectorOcrClassSvmget_support_vector_ocr_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, get_support_vector_num_ocr_class_svmget_support_vector_num_ocr_class_svmGetSupportVectorNumOcrClassSvmGetSupportVectorNumOcrClassSvmget_support_vector_num_ocr_class_svm

See also

create_ocr_class_svmcreate_ocr_class_svmCreateOcrClassSvmCreateOcrClassSvmcreate_ocr_class_svm, read_ocr_trainfread_ocr_trainfReadOcrTrainfReadOcrTrainfread_ocr_trainf, append_ocr_trainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainfappend_ocr_trainf, concat_ocr_trainfconcat_ocr_trainfConcatOcrTrainfConcatOcrTrainfconcat_ocr_trainf

Module

OCR/OCV

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