1. 需要python包

PyPDF2

glob

pdf2image

numpy

2.?PyPDF2轉圖片步驟

使用PdfFileWriter類可以用來生成一個新的PDF對象pdf_writer。

PdfFileReader是PyPDF2包的一個類，擁有與PDF文檔交互的多種方法，調用了該類創造了一個可用來讀取的對象，這個對象的名稱為pdf?。

調用pdf對象的方法getPage()方法去取得就PDF文件的目標頁，下面代碼中我用來獲取PDF第一頁，也就是此方法的參數為整數零，此方法返回一個頁面對象，名稱為page。

調用pdf_writer.addPage(page)將步驟3中page對象加入pdf_writer列表。

調用pdf_writer.write(outfile)將pdf_writer列表中指定頁面保存到臨時文件中outfile。

調用pdf2image中convert_from_bytes方法將5中臨時文件中outfile生成目標圖片。

3. 需要按照依賴poppler

Poppler是用于呈現可移植文檔格式(PDF)文檔的免費軟件實用程序庫。不同機器安裝poppler方式如下：

3.1 mac機器

Press?Command+Space?and type?Terminal?and press?enter/return?key.

Copy and paste the following command in Terminal app:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
and press?enter/return?key. Wait for the command to finish. If you are prompted to enter a password, please type your Mac user's login password and press ENTER. Mind you, as you type your password, it won't be visible on your Terminal (for security reasons), but rest assured it will work.

Now, copy/paste and run this command to make?brew?command available inside the Terminal:?echo 'eval "$(/opt/homebrew/bin/brew shellenv)"' >> ~/.zprofile

Copy and paste the following command:
brew install poppler

Done! You can now use?poppler.

3.2? window安裝

Poppler for Windows

3.3 linux安裝

apt-get install python-poppler?

或者

sudo apt-get install python3-poppler-qt4

4. Python實現轉圖片代碼

from PyPDF2 import PdfFileReader, PdfFileWriter import glob import os from pdf2image import convert_from_bytes import shutil import numpy as np from time import timedef pdf2image2(pdfPath, imagePath):images = convert_from_bytes(open(pdfPath, 'rb').read())for image in images:if not os.path.exists(imagePath):os.makedirs(imagePath)pngname=pdfPath[6:-4]image.save(imagePath+'/'+pngname+'.jpg', 'JPEG',quality=30)def process_bar(no, total_length):bar = '\r' + str(no) + '|' + str(total_length)print(bar, end='', flush=True)def split_combine(path, pdf_writer):pdf = PdfFileReader(path, strict=False)# lastest pagepage = pdf.getPage(0)pdf_writer.addPage(page)def run():# get curren dir pdf filesstart_time = time()pdf_list = glob.glob('*.pdf')pdf_writer = PdfFileWriter()imgpath="./img/"tmppath="./tmp/"if not os.path.exists(imgpath):os.makedirs(imgpath)if not os.path.exists(tmppath):os.makedirs(tmppath)for i, pdf_file in enumerate(pdf_list):process_bar(i + 1, len(pdf_list))split_combine(pdf_file, pdf_writer)with open(tmppath+pdf_file, 'wb') as output_pdf:pdf_writer.write(output_pdf)pdf2image2(tmppath+pdf_file, imgpath)shutil.rmtree(tmppath)end_time = time()print(end_time-start_time)if __name__ == '__main__':run()

總結

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