tesseract python The system cannot find the file specified

Question

I am running a python test framework that uses Tesseract.

When I run a test that uses tesseract however I get the following error :

WindowsError: [Error 2] The system cannot find the file specified

I managed to go through the logs and found it breaks at:

File "C:\Python27\lib\subprocess.py", line 212, in check_output
process = Popen(stdout=PIPE, *popenargs, **kwargs)
File "C:\Python27\lib\subprocess.py", line 390, in __init__
errread, errwrite)
File "C:\Python27\lib\subprocess.py", line 640, in _execute_child
startupinfo)

The subprocess is called by a non python lib command from the framework

def process_frame_text(single_char=False):
    tess_list = ['tesseract', 'tmp/ocr_image.png', 'tmp/ocr_output']
    tess_list += ['-psm', '10'] if single_char else []
    check_output(tess_list, stderr=STDOUT)[:-1]

I have installed windows Tesseract on my machine at C:\Program Files x86\Tesseract-OCR

Appreciate you ideas.

Thanks

thewaywewere · Accepted Answer · 2017-04-07 12:28:45Z

5

Apparently, subprocess module is not able to find tesseract.exe and invoke it from Windows shell. If path to the executable, C:\Program Files x86\Tesseract-OCR, is not added to Windows environment variables, then modify tess_list to provide full file path.

EDIT:

For your case, should set:

TESSDATA_PREFIX = C:\Program Files x86\Tesseract\tessdata that points to the trained language data files.
C:\Program Files (x86)\Tesseract-OCR which is the tesseract.exe file path should be added to Windows system PATH variable as an addition value, such as PATH=%PATH%;"C:\Program Files (x86)\Tesseract-OCR" if added by command for temporary use.

edited Apr 7, 2017 at 12:28

answered Apr 6, 2017 at 20:05

thewaywewere

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4 Comments

mogoli Over a year ago

Thats exactly what the problem is, thank you. Ive added the path directly.

mogoli Over a year ago

It is already an environment variable TESSDATA_PREFIX: C:/Program Files (x86)/Tesseract-OCR/tesseract.exe so im going to investigate why that doesnt work

thewaywewere Over a year ago

@mogoli, check my additional info in Answer under EDIT. Your TESSDATA_PREFIX setting is incorrect.

chaviaras michalis Over a year ago

Worked for me, I just did the second bullet after the "EDIT"

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