75 lines
3.6 KiB
Python
75 lines
3.6 KiB
Python
from typing import List
|
||
from langchain.document_loaders.unstructured import UnstructuredFileLoader
|
||
from configs import PDF_OCR_THRESHOLD,logger
|
||
from document_loaders.ocr import get_ocr
|
||
#PDF_OCR_THRESHOLD= (0.6,0.6)
|
||
#from ocr import get_ocr
|
||
import tqdm
|
||
import re
|
||
|
||
class RapidOCRPDFLoader(UnstructuredFileLoader):
|
||
def _get_elements(self) -> List:
|
||
def pdf2text(filepath):
|
||
import fitz # pyMuPDF里面的fitz包，不要与pip install fitz混淆
|
||
import numpy as np
|
||
ocr = get_ocr()
|
||
doc = fitz.open(filepath)
|
||
resp = ""
|
||
|
||
b_unit = tqdm.tqdm(total=doc.page_count, desc="RapidOCRPDFLoader context page index: 0")
|
||
for i, page in enumerate(doc):
|
||
b_unit.set_description("RapidOCRPDFLoader context page index: {}".format(i))
|
||
b_unit.refresh()
|
||
print(f"****page:{i+1}****")
|
||
text = page.get_text("")
|
||
text_lines = text.strip().split("\n")
|
||
logger.debug(f"文字内容：{text_lines}")
|
||
|
||
img_list = page.get_image_info(xrefs=True)
|
||
ocr_result = []
|
||
for img in img_list:
|
||
if xref := img.get("xref"):
|
||
bbox = img["bbox"]
|
||
# 检查图片尺寸是否超过设定的阈值
|
||
if ((bbox[2] - bbox[0]) / (page.rect.width) < PDF_OCR_THRESHOLD[0]
|
||
or (bbox[3] - bbox[1]) / (page.rect.height) < PDF_OCR_THRESHOLD[1]):
|
||
continue
|
||
pix = fitz.Pixmap(doc, xref)
|
||
img_array = np.frombuffer(pix.samples, dtype=np.uint8).reshape(pix.height, pix.width, -1)
|
||
result, _ = ocr(img_array)
|
||
if result:
|
||
ocr_result = [line[1] for line in result]
|
||
logger.debug(f"图片内容：{ocr_result}")
|
||
#resp += "\n".join(ocr_result)
|
||
|
||
if (len(ocr_result)>0):
|
||
resp += "\n".join(ocr_result)
|
||
else:
|
||
if text_lines:
|
||
# 假设页码在最后一行
|
||
if text_lines[-1].isdigit():
|
||
text = "\n".join(text_lines[:-1])
|
||
logger.debug(f"******去除了页码")
|
||
resp += text + "\n"
|
||
|
||
# 更新进度
|
||
b_unit.update(1)
|
||
|
||
resp = re.sub(r'((?<!.)\d+(?!\.|[a-zA-Z0-9]))', r"\1 ", resp)
|
||
resp = re.sub(r'((?<!.)[a-zA-Z0-9]+\s*\.\s*[a-zA-Z0-9]+(?!\.|[a-zA-Z0-9]))', r"\1 ", resp)
|
||
resp = re.sub(r'((?<!.)[a-zA-Z0-9]+\s*\.\s*[a-zA-Z0-9]+\s*\.\s*[a-zA-Z0-9]+(?!\.|[a-zA-Z0-9]))', r"\1 ", resp)
|
||
return resp
|
||
|
||
text = pdf2text(self.file_path)
|
||
from unstructured.partition.text import partition_text
|
||
return partition_text(text=text, **self.unstructured_kwargs)
|
||
|
||
|
||
if __name__ == "__main__":
|
||
loader = RapidOCRPDFLoader(file_path="/Users/wangvivi/Desktop/Work/思极GPT/数字化部/图片版pdf数据/变电站集中监控验收技术导则.pdf")
|
||
#loader = RapidOCRPDFLoader(file_path="/Users/wangvivi/Desktop/Work/思极GPT/数字化部/原PDF文档/设备/AQ80012007.pdf")
|
||
#loader = RapidOCRPDFLoader(file_path="/Users/wangvivi/Desktop/Work/思极GPT/数字化部/原PDF文档/设备/DL4081991.pdf")
|
||
#loader = RapidOCRPDFLoader(file_path="/Users/wangvivi/Desktop/Work/思极GPT/数字化部/原PDF文档/设备/AQ80032007.pdf")
|
||
docs = loader.load()
|
||
print(docs)
|