Question

我正在尝试设置OCR网络服务，以便我可以从多个位置发送图像进行处理。

我从未对cgi做过任何事情，所以我说是时候尝试mod_wsgi了。我花了2天时间来安装所有库，以及opencv和pytesseract。如果我按照“正常方式”（启动一个新的python窗口解释器），我的OCR工作正常。我有很多麻烦使得一些库可以使用mod_wsgi，即使它们正常工作。

我被困在了pytessearct。如果我用：

运行它

tesseract -l myl image.jpe out

一切正常。

即使我这样做：

import pytessearct
from PIL import Image

pytesseract.image_to_string(Image.open('/var/www/path/image.jpe'), lang='myl')

这也有效。

如果我使用mod_wsgi执行此操作，则会在 httpd log 文件中出现此错误：

mod_wsgi (pid=1836): Exception occurred processing WSGI script '/var/www/path/app.wsgi'.
[Mon May 18 06:28:31 2015] [error] [client IP] Traceback (most recent call last):
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/var/www/path/app.wsgi", line 28, in wsgi_app
[Mon May 18 06:28:31 2015] [error] [client IP]     output = check_text('a.jpe')
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/var/www/path/app.wsgi", line 20, in check_text
[Mon May 18 06:28:31 2015] [error] [client IP]     return pytesseract.image_to_string(Image.open('/var/www/path/a.jpe'), lang='myl')
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/usr/local/lib/python2.7/site-packages/pytesseract/pytesseract.py", line 161, in image_to_string
[Mon May 18 06:28:31 2015] [error] [client IP]     boxes=boxes,
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/usr/local/lib/python2.7/site-packages/pytesseract/pytesseract.py", line 94, in run_tesseract
[Mon May 18 06:28:31 2015] [error] [client IP]     stderr=subprocess.PIPE)
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/usr/local/lib/python2.7/subprocess.py", line 710, in __init__
[Mon May 18 06:28:31 2015] [error] [client IP]     errread, errwrite)
[Mon May 18 06:28:31 2015] [error] [client IP]   File "/usr/local/lib/python2.7/subprocess.py", line 1335, in _execute_child
[Mon May 18 06:28:31 2015] [error] [client IP]     raise child_exception
[Mon May 18 06:28:31 2015] [error] [client IP] OSError: [Errno 2] No such file or directory

这是我的 app.wsgi 文件：

#!/usr/local/bin python2.7
#-*- coding: utf-8 -*-

import os
import sys
from subprocess import check_output



sys.path.append('/var/www/path')

import pytesseract
from PIL import Image

def check_text(image_path):
#   return check_output(['pytesseract', '-l', 'myl', '/var/www/path/a.jpe'])
        return pytesseract.image_to_string(Image.open('/var/www/path/a.jpe'), lang='myl')


def wsgi_app(environ, start_response):
        output = sys.version.encode('utf-8')
        status = '200 OK'
        headers = [('Content-type', 'text/plain'), ('Content-Length', str(len(output)))]
        output = check_text('a.jpe')
        start_response(status, headers)
        return os.getcwd()
        return output

# mod_wsgi need the *application* variable to serve our small app
application = wsgi_app

正如你在源代码中看到的那样，我也试过了子进程的check_output，自己开始一个新的pytesseract进程，但是我得到了同样的错误。

我已经从源代码构建了tesseract和mod_wsgi。但同样，我确定它与mod_wsgi有关，因为如果我在python中正常工作它会起作用。

更新：我有一个与mod_wsgi和opencv类似的“奇怪”问题。问题和答案可以在这里找到：Occasional ctypes error importing numpy from mod_wsgi django app

任何建议都将受到赞赏。

Answer 1

为了解决这个问题，我已将/usr/local/lib/python2.7/site-packages/pytesseract/pytesseract.py行tesseract_cmd = 'tesseract'更改为tesseract_cmd = '/usr/local/bin/tesseract'.

与mod_wsgi一起使用时出现pytesseract错误

1 个答案: