Pytesser
Pytesser copied to clipboard
pytesser.TesseractNotFound
I keep getting the error:
Traceback (most recent call last):
File "C:\Users\phijon0412\Desktop\Ny mapp (2)\test.py", line 6, in <module>
txt = pytesser.image_to_string(image)
File "C:\Users\phijon0412\Desktop\Ny mapp (2)\pytesser.py", line 60, in image_to_string
txt = image_file_to_string(TEMP_IMAGE, lang, psm)
File "C:\Users\phijon0412\Desktop\Ny mapp (2)\pytesser.py", line 65, in image_file_to_string
check_path() #Check if tesseract available in the path
File "C:\Users\phijon0412\Desktop\Ny mapp (2)\pytesser.py", line 35, in check_path
raise TesseractNotFound()
pytesser.TesseractNotFound
But I'm really unsure why.
pytesser.py
import sys
from subprocess import Popen, PIPE
import os
import tempfile
import cv2
PROG_NAME = 'tesseract.exe'
TEMP_IMAGE = tempfile.mktemp()+'.bmp'
TEMP_FILE = tempfile.mktemp()
#All the PSM arguments as a variable name (avoid having to know them)
PSM_OSD_ONLY = 0
PSM_SEG_AND_OSD = 1
PSM_SEG_ONLY = 2
PSM_AUTO = 3
PSM_SINGLE_COLUMN = 4
PSM_VERTICAL_ALIGN = 5
PSM_UNIFORM_BLOCK = 6
PSM_SINGLE_LINE = 7
PSM_SINGLE_WORD = 8
PSM_SINGLE_WORD_CIRCLE = 9
PSM_SINGLE_CHAR = 10
class TesseractException(Exception): #Raised when tesseract does not return 0
pass
class TesseractNotFound(Exception): #When tesseract is not found in the path
pass
def check_path(): #Check if tesseract is in the path raise TesseractNotFound otherwise
for path in os.environ.get('PATH', '').split(':'):
filepath = os.path.join(path, PROG_NAME)
if os.path.exists(filepath) and not os.path.isdir(filepath):
return True
raise TesseractNotFound()
def process_request(input_file, output_file, lang=None, psm=None):
args = [PROG_NAME, input_file, output_file] #Create the arguments
if lang is not None:
args.append("-l")
args.append(lang)
if psm is not None:
args.append("-psm")
args.append(str(psm))
proc = Popen(args, stdout=PIPE, stderr=PIPE) #Open process
ret = proc.communicate() #Launch it
code = proc.returncode
if code != 0:
if code == 2:
raise TesseractException("File not found")
if code == -11:
raise TesseractException("Language code invalid: "+ret[1])
else:
raise TesseractException(ret[1])
def image_to_string(im, lang=None, psm=None):
grayscale_image = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)
cv2.imwrite(TEMP_IMAGE, grayscale_image)
txt = image_file_to_string(TEMP_IMAGE, lang, psm)
os.remove(TEMP_IMAGE)
return txt
def image_file_to_string(file, lang=None, psm=None):
check_path() #Check if tesseract available in the path
grayscale_image = cv2.cvtColor(cv2.imread(file), cv2.COLOR_BGR2GRAY)
cv2.imwrite(TEMP_IMAGE, grayscale_image)
#process_request(file, TEMP_FILE, lang, psm)
process_request(TEMP_IMAGE, TEMP_FILE, lang, psm)
f = open(TEMP_FILE+".txt", "r") #Open back the file
txt = f.read()
f.close()
os.remove(TEMP_FILE+".txt")
os.remove(TEMP_IMAGE)
return txt
if __name__ =='__main__':
print(image_file_to_string(sys.argv[2], sys.argv[1], PSM_AUTO))
Is the tesseract.exe
executable in you path ? It has to be reachable so that subprocess can launch it. pytesser
is just a simple wrapper around this executable.