read_ocrT_read_ocrReadOcrReadOcr (Operator)


read_ocrT_read_ocrReadOcrReadOcr — Read an OCR classifier from a file.


read_ocrread_ocrReadOcrReadOcrReadOcr is obsolete and is only provided for reasons of backward compatibility.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


read_ocr( : : FileName : OcrHandle)

Herror T_read_ocr(const Htuple FileName, Htuple* OcrHandle)

void ReadOcr(const HTuple& FileName, HTuple* OcrHandle)

void HOCRBox::HOCRBox(const HString& FileName)

void HOCRBox::HOCRBox(const char* FileName)

void HOCRBox::HOCRBox(const wchar_t* FileName)   (Windows only)

void HOCRBox::ReadOcr(const HString& FileName)

void HOCRBox::ReadOcr(const char* FileName)

void HOCRBox::ReadOcr(const wchar_t* FileName)   (Windows only)

static void HOperatorSet.ReadOcr(HTuple fileName, out HTuple ocrHandle)

public HOCRBox(string fileName)

void HOCRBox.ReadOcr(string fileName)


The operator read_ocrread_ocrReadOcrReadOcrReadOcr reads an OCR classifier from a file FileNameFileNameFileNameFileNamefileName. This file will hereby be searched in the directory ($HALCONROOT/ocr/) as well as in the currently used directory. If too many classifiers have been loaded, an error message will be displayed.

Execution Information

This operator returns a handle. Note that the state of an instance of this handle type may be changed by specific operators even though the handle is used as an input parameter by those operators.


FileNameFileNameFileNameFileNamefileName (input_control) HTupleHTupleHtuple (string) (string) (HString) (char*)

Name of the OCR classifier file.

Default value: 'testnet' "testnet" "testnet" "testnet" "testnet"

File extension: .obc, .fnt

OcrHandleOcrHandleOcrHandleOcrHandleocrHandle (output_control)  ocr_box HOCRBox, HTupleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

ID of the read OCR classifier.


If the indicated file is available and the format is correct, the operator read_ocrread_ocrReadOcrReadOcrReadOcr returns the value 2 (H_MSG_TRUE). Otherwise an exception will be raised.

Possible Predecessors


Possible Successors

do_ocr_multido_ocr_multiDoOcrMultiDoOcrMultiDoOcrMulti, do_ocr_singledo_ocr_singleDoOcrSingleDoOcrSingleDoOcrSingle, traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxTraindOcrClassBox, trainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBoxTrainfOcrClassBox

See also

write_ocrwrite_ocrWriteOcrWriteOcrWriteOcr, do_ocr_multido_ocr_multiDoOcrMultiDoOcrMultiDoOcrMulti, traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxTraindOcrClassBox, trainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBoxTrainfOcrClassBox