49 lines
1.8 KiB
Python
49 lines
1.8 KiB
Python
from typing import List
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from langchain.document_loaders.unstructured import UnstructuredFileLoader
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import tqdm
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class RapidOCRPDFLoader(UnstructuredFileLoader):
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def _get_elements(self) -> List:
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def pdf2text(filepath):
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import fitz # pyMuPDF里面的fitz包，不要与pip install fitz混淆
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from rapidocr_onnxruntime import RapidOCR
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import numpy as np
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ocr = RapidOCR()
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doc = fitz.open(filepath)
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resp = ""
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b_unit = tqdm.tqdm(total=doc.page_count, desc="RapidOCRPDFLoader context page index: 0")
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for i, page in enumerate(doc):
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# 更新描述
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b_unit.set_description("RapidOCRPDFLoader context page index: {}".format(i))
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# 立即显示进度条更新结果
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b_unit.refresh()
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# TODO: 依据文本与图片顺序调整处理方式
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text = page.get_text("")
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resp += text + "\n"
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img_list = page.get_images()
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for img in img_list:
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pix = fitz.Pixmap(doc, img[0])
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img_array = np.frombuffer(pix.samples, dtype=np.uint8).reshape(pix.height, pix.width, -1)
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result, _ = ocr(img_array)
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if result:
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ocr_result = [line[1] for line in result]
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resp += "\n".join(ocr_result)
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# 更新进度
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b_unit.update(1)
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return resp
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text = pdf2text(self.file_path)
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from unstructured.partition.text import partition_text
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return partition_text(text=text, **self.unstructured_kwargs)
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if __name__ == "__main__":
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loader = RapidOCRPDFLoader(file_path="../tests/samples/ocr_test.pdf")
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docs = loader.load()
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print(docs)
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