python导出PDF文件中的图片_lenxrf

直接上代码，不过要先安装pymupdf，使用pymupdf中的fitz导出PDF中的图片

pip install pymupdf

代码：

import fitz
import re
import os
import sys
import _thread
import threading
import time
 
 
# PDF转图像函数
def pdf2image(path, pic_path):
    checkIM = r"/Subtype(?= */Image)"
    pdf = fitz.open(path)
    lenXREF = pdf.xref_length()
    count = 1
    imgThreadList = []
    # 创建目录
    if not os.path.exists(pic_path):
        os.mkdir(pic_path)
    # 遍历所有对象
    for i in range(1, lenXREF):
        text = pdf.xref_object(i)
        isImage = re.search(checkIM, text)
        if not isImage:
            continue
        print('开始转换 ' + str(i) + '/' + str(lenXREF))
        pix = fitz.Pixmap(pdf, i)
        # 判断图像大小
        if pix.w < 100 or pix.h < 100:
            print('图像过小(' + str(pix.w()) + ',' + str(pix.h()) + ')')
            continue
        # 图像文件路径名称
        new_name = os.path.join(pic_path, f"img_{count}.png")
 
        clock1 = time.monotonic()
 
        # 直接保存
        #pix.writePNG(new_name) #废弃
        pix.save(new_name)
        
        clock2 = time.monotonic()
        print('转换完成(time:' + str(clock2-clock1) + ') ' + str(i) + '/' + str(lenXREF) + ' 图片 -> ' + str(count) + ': ' + new_name)
        count += 1
        pix = None
     
 
 
#####################################################################################################
if __name__=='__main__':
    file_path = r'5.pdf' # PDF 文件路径
    dir_path = r'pics' # 存放图片的文件夹
    # 文件当前路径
    print(os.path.split(sys.argv[0])[0])
    print(os.path.split(os.path.realpath(__file__))[0])
    curPath = os.path.split(os.path.realpath(__file__))[0]
 
    # 开始转换指定文件
    pdf2image(os.path.join(curPath, file_path), os.path.join(curPath, dir_path))
 
 

多线程版，实际尝试了一下似乎没什么效果，暂时只保留代码

import fitz
import re
import os
import sys
import _thread
import threading
import time
 
 
 
# 自定义保存图片线程类
class myThread (threading.Thread):
    def __init__(self, pdfImg, imgFileName):
        threading.Thread.__init__(self)
        self.pdfImg = pdfImg
        self.imgFileName = imgFileName
    def run(self):
        print ("开始线程：" + self.imgFileName)
        time.sleep(1)
        self.pdfImg.save(self.imgFileName)
        print ("退出线程：" + self.imgFileName)
 
# 保存图像函数
def mysaveImg(pdfImg, imgFileName):
    time.sleep(1)
    print ("开始保存图片：" + imgFileName)
    pdfImg.save(imgFileName)
    print ("结束保存图片：" + imgFileName)
 
 
 
# PDF转图像函数
def pdf2image(path, pic_path):
    checkIM = r"/Subtype(?= */Image)"
    pdf = fitz.open(path)
    lenXREF = pdf.xref_length()
    count = 1
    imgThreadList = []
    # 创建目录
    if not os.path.exists(pic_path):
        os.mkdir(pic_path)
    # 遍历所有对象
    for i in range(1, lenXREF):
        text = pdf.xref_object(i)
        isImage = re.search(checkIM, text)
        if not isImage:
            continue
        print('开始转换 ' + str(i) + '/' + str(lenXREF))
        pix = fitz.Pixmap(pdf, i)
        # 判断图像大小
        if pix.w < 100 or pix.h < 100:
            print('图像过小(' + str(pix.w()) + ',' + str(pix.h()) + ')')
            continue
        # 图像文件路径名称
        new_name = os.path.join(pic_path, f"img_{count}.png")
 
        clock1 = time.monotonic()
 
        # 直接保存
        #pix.writePNG(new_name) #废弃
        #pix.save(new_name)
        
        # 虽然使用了多线程，但是保存还是一张一张的保存，原因未知
 
        #启动一个线程处理
        #thread1 = None
        #thread1 = myThread(pix, new_name)
        #thread1.start()
        #thread1 = None
 
        # 线程放入一个列表，等会一起启动
        #imgThreadList.append(myThread(pix, new_name))
        
        # 使用线程函数处理
        _thread.start_new_thread( mysaveImg, (pix, new_name, ) )
        
        clock2 = time.monotonic()
        print('转换完成(time:' + str(clock2-clock1) + ') ' + str(i) + '/' + str(lenXREF) + ' 图片 -> ' + str(count) + ': ' + new_name)
        count += 1
        pix = None
    
    # 启动所有线程
    #for imgThread in imgThreadList:
    #    imgThread.start()  
 
 
 
#####################################################################################################
if __name__=='__main__':
    file_path = r'5.pdf' # PDF 文件路径
    dir_path = r'5556' # 存放图片的文件夹
    # 文件当前路径
    print(os.path.split(sys.argv[0])[0])
    print(os.path.split(os.path.realpath(__file__))[0])
    curPath = os.path.split(os.path.realpath(__file__))[0]
    # 开始转换指定文件
    #pdf2image(os.path.join(curPath, file_path), os.path.join(curPath, dir_path))
    # 转换多个文件
    for index in range(1, 5+1, 1):
         print('文件：' + os.path.join(curPath, str(index)) + '.pdf')
         pdf2image(os.path.join(curPath, str(index)) + '.pdf', os.path.join(curPath, str(index)))
         
 
 
 
 

参考：

https://blog.csdn.net/weixin_46737755/article/details/113085763

https://blog.csdn.net/qq_15969343/article/details/81673302

https://blog.csdn.net/weixin_46737755/article/details/113085763