如何从PDF文件提取文本和文本坐标? [英] How to extract text and text coordinates from a PDF file?

问题描述

我想使用PDFMiner从PDF文件中提取所有文本框和文本框坐标.

I want to extract all the text boxes and text box coordinates from a PDF file with PDFMiner.

许多其他Stack Overflow帖子都介绍了如何以有序方式提取所有文本，但是我该如何执行获取文本和文本位置的中间步骤?

Many other Stack Overflow posts address how to extract all text in an ordered fashion, but how can I do the intermediate step of getting the text and text locations?

给出一个PDF文件，输出应类似于:

Given a PDF file, output should look something like:

   489, 41,  "Signature"
   500, 52,  "b"
   630, 202, "a_g_i_r"

推荐答案

换行符在最终输出中转换为下划线.这是我发现的最小工作解决方案.

Newlines are converted to underscores in final output. This is the minimal working solution that I found.

from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdfpage import PDFPage
from pdfminer.pdfpage import PDFTextExtractionNotAllowed
from pdfminer.pdfinterp import PDFResourceManager
from pdfminer.pdfinterp import PDFPageInterpreter
from pdfminer.pdfdevice import PDFDevice
from pdfminer.layout import LAParams
from pdfminer.converter import PDFPageAggregator
import pdfminer

# Open a PDF file.
fp = open('/Users/me/Downloads/test.pdf', 'rb')

# Create a PDF parser object associated with the file object.
parser = PDFParser(fp)

# Create a PDF document object that stores the document structure.
# Password for initialization as 2nd parameter
document = PDFDocument(parser)

# Check if the document allows text extraction. If not, abort.
if not document.is_extractable:
    raise PDFTextExtractionNotAllowed

# Create a PDF resource manager object that stores shared resources.
rsrcmgr = PDFResourceManager()

# Create a PDF device object.
device = PDFDevice(rsrcmgr)

# BEGIN LAYOUT ANALYSIS
# Set parameters for analysis.
laparams = LAParams()

# Create a PDF page aggregator object.
device = PDFPageAggregator(rsrcmgr, laparams=laparams)

# Create a PDF interpreter object.
interpreter = PDFPageInterpreter(rsrcmgr, device)

def parse_obj(lt_objs):

    # loop over the object list
    for obj in lt_objs:

        # if it's a textbox, print text and location
        if isinstance(obj, pdfminer.layout.LTTextBoxHorizontal):
            print "%6d, %6d, %s" % (obj.bbox[0], obj.bbox[1], obj.get_text().replace('\n', '_'))

        # if it's a container, recurse
        elif isinstance(obj, pdfminer.layout.LTFigure):
            parse_obj(obj._objs)

# loop over all pages in the document
for page in PDFPage.create_pages(document):

    # read the page into a layout object
    interpreter.process_page(page)
    layout = device.get_result()

    # extract text from this object
    parse_obj(layout._objs)

这篇关于如何从PDF文件提取文本和文本坐标?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！