write_ocr_trainfwrite_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainf (Operator)

Name

write_ocr_trainfwrite_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainf — Storing of trained characters into a file.

Signature

Description

The operator write_ocr_trainfwrite_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainf serves to prepare the training with the operator trainf_ocr_class_mlptrainf_ocr_class_mlptrainf_ocr_class_mlpTrainfOcrClassMlpTrainfOcrClassMlp, trainf_ocr_class_svmtrainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm, or trainf_ocr_class_boxtrainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBox. Hereby regions, representing characters, including their gray values (region and pixel) and the corresponding class name will be written into a file. An arbitrary number of regions within one image is supported. For each character (region) in CharacterCharacterCharacterCharactercharacter the corresponding class name must be specified in ClassClassClassClassclassVal. The gray values are passed via the parameter ImageImageImageImageimage. If no file extension is specified in FileNameFileNameFileNameFileNamefileName the extension '.trf' is appended to the file name. The version of the file format used for writing data can be defined by the parameter 'ocr_trainf_version'"ocr_trainf_version""ocr_trainf_version""ocr_trainf_version""ocr_trainf_version" of the operator set_systemset_systemset_systemSetSystemSetSystem.

Parallelization

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

Parameters

char       name[128];
HTuple     Class,Name;

read_image(&Image,"character.tiff");
bin_threshold(Image,&Dark);
connection(Dark,&Character);
count_obj(Character,&num);
create_tuple(&Class,num);
open_window(0,0,-1,-1,0,"","",&WindowHandle);
set_color(WindowHandle,"red");
for (i=0; i<num; i++) {
  select_obj(Character,&SingleCharacter,i);
  clear_window(WindowHandle);
  disp_region(SingleCharacter,WindowHandle);
  printf("class of character %d ?\n",i);
  scanf("%s\n",name);
  set_s(Class,name,i);
}
create_tuple(&Name,1);
set_s(Class,Name,"trainfile");
T_write_ocr_trainf(Character,Image,Class,Name);

Result

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

Possible Predecessors

thresholdthresholdthresholdThresholdThreshold, connectionconnectionconnectionConnectionConnection, create_ocr_class_boxcreate_ocr_class_boxcreate_ocr_class_boxCreateOcrClassBoxCreateOcrClassBox, read_ocrread_ocrread_ocrReadOcrReadOcr

Possible Successors

trainf_ocr_class_mlptrainf_ocr_class_mlptrainf_ocr_class_mlpTrainfOcrClassMlpTrainfOcrClassMlp, trainf_ocr_class_svmtrainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvm, trainf_ocr_class_boxtrainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBox, info_ocr_class_boxinfo_ocr_class_boxinfo_ocr_class_boxInfoOcrClassBoxInfoOcrClassBox, write_ocrwrite_ocrwrite_ocrWriteOcrWriteOcr, do_ocr_multido_ocr_multido_ocr_multiDoOcrMultiDoOcrMulti, do_ocr_singledo_ocr_singledo_ocr_singleDoOcrSingleDoOcrSingle

Module

OCR/OCV