python - 使用 Textract 提取/抓取 PDF - 不打印文本

Question

我正在尝试使用 Textract 提取 doem PDF 文件中的文本。但是，当我打印代码末尾的文本时，它只是打印出很多空白。谁能指出我正在发生的事情的方向吗？ (顺便说一下，文本不是=“”)

import os
import codecs
import PyPDF2 
import textract
from nltk.tokenize import word_tokenize
from nltk.corpus import stopwords

for filename in os.listdir('Harbour PDF'):
    if '.DS_Store' == filename:
        continue
    filename = 'Harbour PDF/' + filename
    print(filename)

    pdfFileObj = open(filename,'rb')

    pdfReader = PyPDF2.PdfFileReader(pdfFileObj)

    num_pages = pdfReader.numPages
    count = 0
    text = ""

    while count < num_pages:
        pageObj = pdfReader.getPage(count)
        count +=1
        text += pageObj.extractText()


    if text != "":
        text = text
    else:
        text = textract.process(pdfFileObj, method='tesseract', language='eng')

    print(text)

Answer 1

我通过 python 使用 2 个函数(第二个需要 tesseract)。好吧，实际上我更喜欢 tesseract 而不是 pdfminer，但它们实际上做了同样的事情。不确定你的代码有什么问题，但我相信这些是替代的等价物。

from PIL import Image
import pytesseract
import cv2
import os
import subprocess

from pdfminer.converter import TextConverter
from pdfminer.pdfinterp import PDFPageInterpreter
from pdfminer.pdfinterp import PDFResourceManager
from pdfminer.pdfpage import PDFPage

#converts pdf, returns its text content as a string
def convert(fname, pages=None):
    if not pages:
        pagenums = set()
    else:
        pagenums = set(pages)

    output = StringIO()
    manager = PDFResourceManager()
    converter = TextConverter(manager, output, laparams=LAParams())
    interpreter = PDFPageInterpreter(manager, converter)

    infile = open(fname, 'rb')
    for page in PDFPage.get_pages(infile, pagenums):
        interpreter.process_page(page)
    infile.close()
    converter.close()
    text = output.getvalue()
    output.close
    return text

def to_txt(pdf_path, output_dir, name=None):
    if not os.path.exists(output_dir):
        os.makedirs(output_dir)
    if name == None:
        parts = pdf_path.split('\\')
        fname = parts[-1][:-4] + '.txt'
        fname = fname.replace(" ", "_")
        end = output_dir + fname
    else:
        if name[-4:] != '.txt':
            name += '.txt'
        end = output_dir + name
    cmd = ['pdftotext', pdf_path,
           end]
    subprocess.call(cmd)
    print('Converted')