PIL导入图像和pytesser导入时出错

Question

我是Python的新手。我正在尝试创建一个Python OCR程序，并且正在遵循它的在线教程。下面是我推荐使用的代码：

from PIL import Image
from pytesser import *

image_file = 'menu.tif'
im = Image.open(image_file)
text = image_to_string(im)
text = image_file_to_string(image_file)
text = image_file_to_string(image_file, graceful_errors=True)
print "=====output=======\n"
print text

教程链接位于here。然而，在运行这段代码时，我得到了这个错误。

    from pytesser import *
ImportError: No module named 'pytesser'

我遵循了在code(dot)google(dot)com/archive/p/pytesser/downloads安装OCR here和PyTesser库的说明(对不起，因为<10 rep我不能发布超过2个链接)。

这是迄今为止我的安装文件的屏幕截图(见下面的gyazo )，其中"pytesser_v0.0.1“是我的pytesser文件夹，" tesseract -master”是在GitHub上找到的(可能并不相关)，"tessinstall“是我安装tesseract的文件夹，最后pyimgr.py是我尝试运行的文件。

gyazo(dot)com/333f8a3333e87895558f26875a8a8487

我之前也得到了一个关于PIL导入图像的错误。我不应该使用PIL，那么有没有其他方法可以在没有PIL的情况下导入Image？要枕头吗？

我的Python版本是3.5.2，我使用的是windows10。

Answer 1

我的第一个预感是，您的库安装在Python不知道的位置。

import sys
print sys.path

如果您在Python中执行这些代码行，它将向您显示Python将在何处查找鸡蛋。pytesser库在那里吗？

此外:顺便说一句：pip3 search tesseract将向您展示一些其他的tesseract Python包。所以您可以使用Python包管理器。

Answer 2

将代码更改为：

"""OCR in Python using the Tesseract engine from Google
http://code.google.com/p/pytesser/
by Michael J.T. O'Kelly
V 0.0.1, 3/10/07"""

import PIL.Image
import subprocess

import util
import errors

tesseract_exe_name = 'tesseract' # Name of executable to be called at command line
scratch_image_name = "temp.bmp" # This file must be .bmp or other Tesseract-compatible format
scratch_text_name_root = "temp" # Leave out the .txt extension
cleanup_scratch_flag = True  # Temporary files cleaned up after OCR operation

def call_tesseract(input_filename, output_filename):
    """Calls external tesseract.exe on input file (restrictions on types),
    outputting output_filename+'txt'"""
    args = [tesseract_exe_name, input_filename, output_filename]
    proc = subprocess.Popen(args)
    retcode = proc.wait()
    if retcode!=0:
        errors.check_for_errors()

def image_to_string(im, cleanup = cleanup_scratch_flag):
    """Converts im to file, applies tesseract, and fetches resulting text.
    If cleanup=True, delete scratch files after operation."""
    try:
        util.image_to_scratch(im, scratch_image_name)
        call_tesseract(scratch_image_name, scratch_text_name_root)
        text = util.retrieve_text(scratch_text_name_root)
    finally:
        if cleanup:
            util.perform_cleanup(scratch_image_name, scratch_text_name_root)
    return text

def image_file_to_string(filename, cleanup = cleanup_scratch_flag, graceful_errors=True):
    """Applies tesseract to filename; or, if image is incompatible and graceful_errors=True,
    converts to compatible format and then applies tesseract.  Fetches resulting text.
    If cleanup=True, delete scratch files after operation."""
    try:
        try:
            call_tesseract(filename, scratch_text_name_root)
            text = util.retrieve_text(scratch_text_name_root)
        except errors.Tesser_General_Exception:
            if graceful_errors:
                im = PIL.Image.open(filename)
                text = image_to_string(im, cleanup)
            else:
                raise
    finally:
        if cleanup:
            util.perform_cleanup(scratch_image_name, scratch_text_name_root)
    return text


if __name__=='__main__':
    im = PIL.Image.open('phototest.tif')
    text = image_to_string(im)
    print text
    try:
        text = image_file_to_string('fnord.tif', graceful_errors=False)
    except errors.Tesser_General_Exception, value:
        print "fnord.tif is incompatible filetype.  Try graceful_errors=True"
        print value
    text = image_file_to_string('fnord.tif', graceful_errors=True)
    print "fnord.tif contents:", text
    text = image_file_to_string('fonts_test.png', graceful_errors=True)
    print text