| append_ocr_trainf | Add characters to a training file. |
| concat_ocr_trainf | Concat training files. |
| read_ocr_trainf | Read training characters from files and convert to images. |
| read_ocr_trainf_names | Query which characters are stored in a training file. |
| read_ocr_trainf_select | Read training specific characters from files and convert to images. |
| write_ocr_trainf | Storing of trained characters into a file. |
| write_ocr_trainf_image | Write characters into a training file. |