Распознание текста с tesseract на различных языках

try:
    from PIL import Image
except ImportError:
    import Image
import pytesseract
 
def ocr_core(filename):
    """
    This function will handle the core OCR processing of images.
    """
    text = pytesseract.image_to_string(Image.open(filename), lang='rus')
    return text
 
print(ocr_core('F:/ocr_core/test.png'))

Traceback (most recent call last):
  File "core_ocr.py", line 14, in <module>
    print(ocr_core('F:/ocr_core/test.png'))
  File "core_ocr.py", line 11, in ocr_core
    text = pytesseract.image_to_string(Image.open(filename), lang='rus')
  File "F:\ocr_core\venv\lib\site-packages\pytesseract\pytesseract.py", line 345, in image_to_string
    }[output_type]()
  File "F:\ocr_core\venv\lib\site-packages\pytesseract\pytesseract.py", line 344, in <lambda>
    Output.STRING: lambda: run_and_get_output(*args),
  File "F:\ocr_core\venv\lib\site-packages\pytesseract\pytesseract.py", line 253, in run_and_get_output
    run_tesseract(**kwargs)
  File "F:\ocr_core\venv\lib\site-packages\pytesseract\pytesseract.py", line 229, in run_tesseract
    raise TesseractError(proc.returncode, get_errors(error_string))
pytesseract.pytesseract.TesseractError: (3221225477, '')