Name
trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm — Train an OCR classifier.
trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm trains the OCR classifier
OCRHandleOCRHandleOCRHandleOCRHandleOCRHandleOCRHandle with the training characters stored in the OCR
training files given by TrainingFileTrainingFileTrainingFileTrainingFileTrainingFiletrainingFile. The training files
must have been created, e.g., using write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainf, before
calling trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm. The parameters
EpsilonEpsilonEpsilonEpsilonEpsilonepsilon and TrainModeTrainModeTrainModeTrainModeTrainModetrainMode have the same meaning as in
train_class_svmtrain_class_svmTrainClassSvmtrain_class_svmTrainClassSvmTrainClassSvm. Please, note that training characters that have
no corresponding class in the classifier OCRHandleOCRHandleOCRHandleOCRHandleOCRHandleOCRHandle are discarded.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
This operator modifies the state of the following input parameter:
The value of this parameter may not be shared across multiple threads without external synchronization.
Handle of the OCR classifier.
Names of the training files.
Default value:
'ocr.trf'
"ocr.trf"
"ocr.trf"
"ocr.trf"
"ocr.trf"
"ocr.trf"
File extension: .trf, .otr
Stop parameter for training.
Default value: 0.001
Suggested values: 0.00001, 0.0001, 0.001, 0.01, 0.1
Mode of training.
Default value:
'default'
"default"
"default"
"default"
"default"
"default"
List of values: 'add_sv_to_train_set'"add_sv_to_train_set""add_sv_to_train_set""add_sv_to_train_set""add_sv_to_train_set""add_sv_to_train_set", 'default'"default""default""default""default""default"
* Train an OCR classifier
read_ocr_trainf_names ('ocr.trf', CharacterNames, CharacterCount)
create_ocr_class_svm (8, 10, 'constant', 'default', CharacterNames, \
'rbf', 0.01, 0.01, 'one-versus-one', \
'normalization', 81, OCRHandle)
trainf_ocr_class_svm (OCRHandle, 'ocr.trf', 0.001, 'default')
write_ocr_class_svm (OCRHandle, 'ocr.osc')
clear_ocr_class_svm (OCRHandle)
If the parameters are valid the operator
trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm returns the value 2 (H_MSG_TRUE). If necessary,
an exception is raised.
trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm may return the error 9211 (Matrix is
not positive definite) if Preprocessing =
'canonical_variates'"canonical_variates""canonical_variates""canonical_variates""canonical_variates""canonical_variates" is used. This typically indicates
that not enough training samples have been stored for each class.
In this case we recommend to change Preprocessing to
'normalization'"normalization""normalization""normalization""normalization""normalization". Another solution can be to add more
training samples.
create_ocr_class_svmcreate_ocr_class_svmCreateOcrClassSvmcreate_ocr_class_svmCreateOcrClassSvmCreateOcrClassSvm,
write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainf,
append_ocr_trainfappend_ocr_trainfAppendOcrTrainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainf,
write_ocr_trainf_imagewrite_ocr_trainf_imageWriteOcrTrainfImagewrite_ocr_trainf_imageWriteOcrTrainfImageWriteOcrTrainfImage
do_ocr_single_class_svmdo_ocr_single_class_svmDoOcrSingleClassSvmdo_ocr_single_class_svmDoOcrSingleClassSvmDoOcrSingleClassSvm,
do_ocr_multi_class_svmdo_ocr_multi_class_svmDoOcrMultiClassSvmdo_ocr_multi_class_svmDoOcrMultiClassSvmDoOcrMultiClassSvm,
write_ocr_class_svmwrite_ocr_class_svmWriteOcrClassSvmwrite_ocr_class_svmWriteOcrClassSvmWriteOcrClassSvm
read_ocr_class_svmread_ocr_class_svmReadOcrClassSvmread_ocr_class_svmReadOcrClassSvmReadOcrClassSvm
train_class_svmtrain_class_svmTrainClassSvmtrain_class_svmTrainClassSvmTrainClassSvm
OCR/OCV