테서렉트 사용 방법
Google Tesseract 사용 방법 정리
설치 방법¶
- Windows: Tesseract at UB Mannheim에서 설치파일 다운로드 가능
- Linux: 아래 명령어들로 다운로드 및 설치 가능
사용 방법¶
주요 언어별 tesseract 사용 보조 패키지
- Python: pytesseract
CLI에서 Tesseract 설치 위치에 접근하여 tesseract.exe 파일을 실행하면 아래와 같이 기초 사용법을 확인할 수 있음
Usage:
tesseract.exe --help | --help-extra | --version
tesseract.exe --list-langs
tesseract.exe imagename outputbase [options...] [configfile...]
OCR options:
-l LANG[+LANG] Specify language(s) used for OCR.
NOTE: These options must occur before any configfile.
Single options:
--help Show this help message.
--help-extra Show extra help for advanced users.
--version Show version information.
--list-langs List available languages for tesseract engine.
전체 명령어 확인 방법
Usage:
tesseract.exe --help | --help-extra | --help-psm | --help-oem | --version
tesseract.exe --list-langs [--tessdata-dir PATH]
tesseract.exe --print-fonts-table [options...] [configfile...]
tesseract.exe --print-parameters [options...] [configfile...]
tesseract.exe imagename|imagelist|stdin outputbase|stdout [options...] [configfile...]
OCR options:
--tessdata-dir PATH Specify the location of tessdata path.
--user-words PATH Specify the location of user words file.
--user-patterns PATH Specify the location of user patterns file.
--dpi VALUE Specify DPI for input image.
--loglevel LEVEL Specify logging level. LEVEL can be
ALL, TRACE, DEBUG, INFO, WARN, ERROR, FATAL or OFF.
-l LANG[+LANG] Specify language(s) used for OCR.
-c VAR=VALUE Set value for config variables.
Multiple -c arguments are allowed.
--psm NUM Specify page segmentation mode.
--oem NUM Specify OCR Engine mode.
NOTE: These options must occur before any configfile.
Page segmentation modes:
0 Orientation and script detection (OSD) only.
1 Automatic page segmentation with OSD.
2 Automatic page segmentation, but no OSD, or OCR. (not implemented)
3 Fully automatic page segmentation, but no OSD. (Default)
4 Assume a single column of text of variable sizes.
5 Assume a single uniform block of vertically aligned text.
6 Assume a single uniform block of text.
7 Treat the image as a single text line.
8 Treat the image as a single word.
9 Treat the image as a single word in a circle.
10 Treat the image as a single character.
11 Sparse text. Find as much text as possible in no particular order.
12 Sparse text with OSD.
13 Raw line. Treat the image as a single text line,
bypassing hacks that are Tesseract-specific.
OCR Engine modes:
0 Legacy engine only.
1 Neural nets LSTM engine only.
2 Legacy + LSTM engines.
3 Default, based on what is available.
Single options:
-h, --help Show minimal help message.
--help-extra Show extra help for advanced users.
--help-psm Show page segmentation modes.
--help-oem Show OCR Engine modes.
-v, --version Show version information.
--list-langs List available languages for tesseract engine.
--print-fonts-table Print tesseract fonts table.
--print-parameters Print tesseract parameters.
현재 환경에 설치 된 인식 언어 확인 명령어
실행 옵션¶
- PSM
Page segmentation modes:
0 Orientation and script detection (OSD) only.
1 Automatic page segmentation with OSD.
2 Automatic page segmentation, but no OSD, or OCR. (not implemented)
3 Fully automatic page segmentation, but no OSD. (Default)
4 Assume a single column of text of variable sizes.
5 Assume a single uniform block of vertically aligned text.
6 Assume a single uniform block of text.
7 Treat the image as a single text line.
8 Treat the image as a single word.
9 Treat the image as a single word in a circle.
10 Treat the image as a single character.
11 Sparse text. Find as much text as possible in no particular order.
12 Sparse text with OSD.
13 Raw line. Treat the image as a single text line,
bypassing hacks that are Tesseract-specific.
- OEM