[英]Pdf miner how to extract images
我正在尝试使用pdfminer.six
从 PDF 文件中提取图像
似乎没有关于如何使用 Python 执行此操作的任何文档。
这是我到目前为止所拥有的:
import os
import pdfminer
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
from io import StringIO
os.chdir('C:\\Users\\zone_\\Desktop')
diretorio = os.getcwd()
file = str(diretorio) + '\\example.pdf'
def convert_pdf_to_txt(path):
rsrcmgr = PDFResourceManager()
retstr = StringIO()
codec = 'utf-8'
laparams = LAParams()
device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
fp = open(path, 'rb')
interpreter = PDFPageInterpreter(rsrcmgr, device)
password = ""
maxpages = 0
caching = True
pagenos=set()
for page in PDFPage.get_pages(fp, pagenos, maxpages=maxpages, password=password,caching=caching, check_extractable=True):
interpreter.process_page(page)
text = retstr.getvalue()
fp.close()
device.close()
retstr.close()
return text
这是提取文本,但如何检索 pdf 中的图像?
最新版本的 PDFMiner 提供pdfminer.image.ImageWriter
class,它处理图像序列化。 你可以像这样使用它:
import pdfminer
from pdfminer.image import ImageWriter
from pdfminer.high_level import extract_pages
pages = list(extract_pages('document.pdf'))
page = pages[0]
def get_image(layout_object):
if isinstance(layout_object, pdfminer.layout.LTImage):
return layout_object
if isinstance(layout_object, pdfminer.layout.LTContainer):
for child in layout_object:
return get_image(child)
else:
return None
def save_images_from_page(page: pdfminer.layout.LTPage):
images = list(filter(bool, map(get_image, page)))
iw = ImageWriter('output_dir')
for image in images:
iw.export_image(image)
save_images_from_page(page)
您也可以使用命令行工具,如 文档中所述。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.