如何隐藏控制台 window 当我 运行 tesseract with pytesseract with CREATE_NO_WINDOW
How to hide the console window when I run tesseract with pytesseract with CREATE_NO_WINDOW
我正在使用 tesseract 在截屏上执行 OCR。我有一个使用 tkinter window 的应用程序，在我的 class 的初始化中利用 self.after 在 tkinter window 中执行持续的图像抓取和更新标签等值。我已经搜索了好几天，但找不到任何具体示例如何在 Windows 平台上利用 CREATE_NO_WINDOW 和 Python3.6 调用 tesseract 和 pytesseract。
这与这个问题有关：
How can I hide the console window when I run tesseract with pytesser
我编程 Python 才 2 周，不明白 what/how 执行上述问题中的步骤。我打开 pytesseract.py 文件并查看并找到了 proc = subprocess.Popen(command, stderr=subproces.PIPE) 行，但是当我尝试编辑它时，我遇到了一堆错误，我无法做到这一点'想不通。
#!/usr/bin/env python
'''
Python-tesseract. For more information: https://github.com/madmaze/pytesseract
'''
try:
import Image
except ImportError:
from PIL import Image
import os
import sys
import subprocess
import tempfile
import shlex
# CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
tesseract_cmd = 'tesseract'
__all__ = ['image_to_string']
def run_tesseract(input_filename, output_filename_base, lang=None, boxes=False,
config=None):
'''
runs the command:
`tesseract_cmd` `input_filename` `output_filename_base`
returns the exit status of tesseract, as well as tesseract's stderr output
'''
command = [tesseract_cmd, input_filename, output_filename_base]
if lang is not None:
command += ['-l', lang]
if boxes:
command += ['batch.nochop', 'makebox']
if config:
command += shlex.split(config)
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
status = proc.wait()
error_string = proc.stderr.read()
proc.stderr.close()
return status, error_string
def cleanup(filename):
''' tries to remove the given filename. Ignores non-existent files '''
try:
os.remove(filename)
except OSError:
pass
def get_errors(error_string):
'''
returns all lines in the error_string that start with the string "error"
'''
error_string = error_string.decode('utf-8')
lines = error_string.splitlines()
error_lines = tuple(line for line in lines if line.find(u'Error') >= 0)
if len(error_lines) > 0:
return u'\n'.join(error_lines)
else:
return error_string.strip()
def tempnam():
''' returns a temporary file-name '''
tmpfile = tempfile.NamedTemporaryFile(prefix="tess_")
return tmpfile.name
class TesseractError(Exception):
def __init__(self, status, message):
self.status = status
self.message = message
self.args = (status, message)
def image_to_string(image, lang=None, boxes=False, config=None):
'''
Runs tesseract on the specified image. First, the image is written to disk,
and then the tesseract command is run on the image. Tesseract's result is
read, and the temporary files are erased.
Also supports boxes and config:
if boxes=True
"batch.nochop makebox" gets added to the tesseract call
if config is set, the config gets appended to the command.
ex: config="-psm 6"
'''
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
input_file_name = '%s.bmp' % tempnam()
output_file_name_base = tempnam()
if not boxes:
output_file_name = '%s.txt' % output_file_name_base
else:
output_file_name = '%s.box' % output_file_name_base
try:
image.save(input_file_name)
status, error_string = run_tesseract(input_file_name,
output_file_name_base,
lang=lang,
boxes=boxes,
config=config)
if status:
errors = get_errors(error_string)
raise TesseractError(status, errors)
f = open(output_file_name, 'rb')
try:
return f.read().decode('utf-8').strip()
finally:
f.close()
finally:
cleanup(input_file_name)
cleanup(output_file_name)
def main():
if len(sys.argv) == 2:
filename = sys.argv[1]
try:
image = Image.open(filename)
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image))
elif len(sys.argv) == 4 and sys.argv[1] == '-l':
lang = sys.argv[2]
filename = sys.argv[3]
try:
image = Image.open(filename)
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image, lang=lang))
else:
sys.stderr.write('Usage: python pytesseract.py [-l lang] input_file\n')
exit(2)
if __name__ == '__main__':
main()
我使用的代码类似于类似问题中的示例：
def get_string(img_path):
# Read image with opencv
img = cv2.imread(img_path)
# Convert to gray
img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Apply dilation and erosion to remove some noise
kernel = np.ones((1, 1), np.uint8)
img = cv2.dilate(img, kernel, iterations=1)
img = cv2.erode(img, kernel, iterations=1)
# Write image after removed noise
cv2.imwrite(src_path + "removed_noise.png", img)
# Apply threshold to get image with only black and white
# Write the image after apply opencv to do some ...
cv2.imwrite(src_path + "thres.png", img)
# Recognize text with tesseract for python
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
return result
当它到达下一行时，黑色控制台闪烁 window 不到一秒，然后在运行命令时关闭。
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
这是控制台的图片window:
Program Files (x86)_Tesseract
这是另一个问题的建议：
You're currently working in IDLE, in which case I don't think it
really matters if a console window pops up. If you're planning to
develop a GUI app with this library, then you'll need to modify the
subprocess.Popen call in pytesser.py to hide the console. I'd first
try the CREATE_NO_WINDOW process creation flag. – eryksun
对于如何使用 CREATE_NO_WINDOW 修改 pytesseract.py 库文件中的 subprocess.Popen 调用，我将不胜感激。我也不确定 pytesseract.py 和 pytesser.py 库文件之间的区别。我会在另一个问题上发表评论以要求澄清，但我不能在这个网站上获得更多声誉。
我做了更多研究，并决定更多地了解 subprocess.Popen:
我还参考了以下文章：
using python subprocess.popen..can't prevent exe stopped working prompt
我把pytesseract.py中原来的一行代码改成了：
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
以下内容：
proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW)
我运行代码并得到以下错误：
Exception in Tkinter callback Traceback (most recent call last):
File
"C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\tkinter__init__.py",
line 1699, in call
return self.func(*args) File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
403, in gather_data
update_cash_button() File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
208, in update_cash_button
currentCash = get_string(src_path + "cash.png") File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
150, in get_string
result = pytesseract.image_to_string(Image.open(src_path + "thres.png")) File
"C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py",
line 125, in image_to_string
config=config) File "C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py",
line 49, in run_tesseract
proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW) NameError: name 'CREATE_NO_WINDOW'
is not defined
然后我定义了 CREATE_NO_WINDOW 变量：
#Assignment of the value of CREATE_NO_WINDOW
CREATE_NO_WINDOW = 0x08000000
我从上面的链接文章中得到了 0x08000000 的值。添加定义后，我 运行 应用程序，我没有再收到任何控制台 window 弹出窗口。
我正在使用 tesseract 在截屏上执行 OCR。我有一个使用 tkinter window 的应用程序，在我的 class 的初始化中利用 self.after 在 tkinter window 中执行持续的图像抓取和更新标签等值。我已经搜索了好几天，但找不到任何具体示例如何在 Windows 平台上利用 CREATE_NO_WINDOW 和 Python3.6 调用 tesseract 和 pytesseract。
这与这个问题有关：
How can I hide the console window when I run tesseract with pytesser
我编程 Python 才 2 周，不明白 what/how 执行上述问题中的步骤。我打开 pytesseract.py 文件并查看并找到了 proc = subprocess.Popen(command, stderr=subproces.PIPE) 行，但是当我尝试编辑它时，我遇到了一堆错误，我无法做到这一点'想不通。
#!/usr/bin/env python
'''
Python-tesseract. For more information: https://github.com/madmaze/pytesseract
'''
try:
import Image
except ImportError:
from PIL import Image
import os
import sys
import subprocess
import tempfile
import shlex
# CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
tesseract_cmd = 'tesseract'
__all__ = ['image_to_string']
def run_tesseract(input_filename, output_filename_base, lang=None, boxes=False,
config=None):
'''
runs the command:
`tesseract_cmd` `input_filename` `output_filename_base`
returns the exit status of tesseract, as well as tesseract's stderr output
'''
command = [tesseract_cmd, input_filename, output_filename_base]
if lang is not None:
command += ['-l', lang]
if boxes:
command += ['batch.nochop', 'makebox']
if config:
command += shlex.split(config)
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
status = proc.wait()
error_string = proc.stderr.read()
proc.stderr.close()
return status, error_string
def cleanup(filename):
''' tries to remove the given filename. Ignores non-existent files '''
try:
os.remove(filename)
except OSError:
pass
def get_errors(error_string):
'''
returns all lines in the error_string that start with the string "error"
'''
error_string = error_string.decode('utf-8')
lines = error_string.splitlines()
error_lines = tuple(line for line in lines if line.find(u'Error') >= 0)
if len(error_lines) > 0:
return u'\n'.join(error_lines)
else:
return error_string.strip()
def tempnam():
''' returns a temporary file-name '''
tmpfile = tempfile.NamedTemporaryFile(prefix="tess_")
return tmpfile.name
class TesseractError(Exception):
def __init__(self, status, message):
self.status = status
self.message = message
self.args = (status, message)
def image_to_string(image, lang=None, boxes=False, config=None):
'''
Runs tesseract on the specified image. First, the image is written to disk,
and then the tesseract command is run on the image. Tesseract's result is
read, and the temporary files are erased.
Also supports boxes and config:
if boxes=True
"batch.nochop makebox" gets added to the tesseract call
if config is set, the config gets appended to the command.
ex: config="-psm 6"
'''
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
input_file_name = '%s.bmp' % tempnam()
output_file_name_base = tempnam()
if not boxes:
output_file_name = '%s.txt' % output_file_name_base
else:
output_file_name = '%s.box' % output_file_name_base
try:
image.save(input_file_name)
status, error_string = run_tesseract(input_file_name,
output_file_name_base,
lang=lang,
boxes=boxes,
config=config)
if status:
errors = get_errors(error_string)
raise TesseractError(status, errors)
f = open(output_file_name, 'rb')
try:
return f.read().decode('utf-8').strip()
finally:
f.close()
finally:
cleanup(input_file_name)
cleanup(output_file_name)
def main():
if len(sys.argv) == 2:
filename = sys.argv[1]
try:
image = Image.open(filename)
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image))
elif len(sys.argv) == 4 and sys.argv[1] == '-l':
lang = sys.argv[2]
filename = sys.argv[3]
try:
image = Image.open(filename)
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image, lang=lang))
else:
sys.stderr.write('Usage: python pytesseract.py [-l lang] input_file\n')
exit(2)
if __name__ == '__main__':
main()
我使用的代码类似于类似问题中的示例：
def get_string(img_path):
# Read image with opencv
img = cv2.imread(img_path)
# Convert to gray
img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Apply dilation and erosion to remove some noise
kernel = np.ones((1, 1), np.uint8)
img = cv2.dilate(img, kernel, iterations=1)
img = cv2.erode(img, kernel, iterations=1)
# Write image after removed noise
cv2.imwrite(src_path + "removed_noise.png", img)
# Apply threshold to get image with only black and white
# Write the image after apply opencv to do some ...
cv2.imwrite(src_path + "thres.png", img)
# Recognize text with tesseract for python
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
return result
当它到达下一行时，黑色控制台闪烁 window 不到一秒，然后在运行命令时关闭。
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
这是控制台的图片window:
Program Files (x86)_Tesseract
这是另一个问题的建议：
You're currently working in IDLE, in which case I don't think it really matters if a console window pops up. If you're planning to develop a GUI app with this library, then you'll need to modify the subprocess.Popen call in pytesser.py to hide the console. I'd first try the CREATE_NO_WINDOW process creation flag. – eryksun
对于如何使用 CREATE_NO_WINDOW 修改 pytesseract.py 库文件中的 subprocess.Popen 调用，我将不胜感激。我也不确定 pytesseract.py 和 pytesser.py 库文件之间的区别。我会在另一个问题上发表评论以要求澄清，但我不能在这个网站上获得更多声誉。
我做了更多研究，并决定更多地了解 subprocess.Popen:
我还参考了以下文章：
using python subprocess.popen..can't prevent exe stopped working prompt
我把pytesseract.py中原来的一行代码改成了：
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
以下内容：
proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW)
我运行代码并得到以下错误：
Exception in Tkinter callback Traceback (most recent call last):
File "C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\tkinter__init__.py", line 1699, in call return self.func(*args) File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line 403, in gather_data update_cash_button() File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line 208, in update_cash_button currentCash = get_string(src_path + "cash.png") File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line 150, in get_string result = pytesseract.image_to_string(Image.open(src_path + "thres.png")) File "C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py", line 125, in image_to_string config=config) File "C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py", line 49, in run_tesseract proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW) NameError: name 'CREATE_NO_WINDOW' is not defined
然后我定义了 CREATE_NO_WINDOW 变量：
#Assignment of the value of CREATE_NO_WINDOW
CREATE_NO_WINDOW = 0x08000000
我从上面的链接文章中得到了 0x08000000 的值。添加定义后，我 运行 应用程序，我没有再收到任何控制台 window 弹出窗口。