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  • python PDF 图片

    2020-04-26 18:05:35
    python PDF 图片 代码 import fitz import time import re import os def pdf2image(pdf_path):       '''     # 从pdf中提取图片     :param path: ...

    python PDF 转 图片 fitz库

    代码

    import fitz
    import time
    import re
    import os
    def pdf2image(pdf_path):   
        '''
        # 从pdf中提取图片
        :param path: pdf的路径
        :param pic_path: 图片保存的路径
        :return:
        '''
        # 生成图片初始时间
        t0 = time.clock()
        # 使用正则表达式来查找图片
        checkXO = r"/Type(?= */XObject)" 
        checkIM = r"/Subtype(?= */Image)"  
        # 打开pdf
        doc = fitz.open(pdf_path)
        # 图片计数
        imgcount = 0
        lenXREF = doc._getXrefLength()
        # 打印PDF的信息
        print("pdf路径:{}, 页数: {}, 对象: {}".format(pdf_path, len(doc), lenXREF - 1))
        # 遍历每一个对象
        for i in range(1, lenXREF):
            # 定义对象字符串
            text = doc._getXrefString(i)
            isXObject = re.search(checkXO, text)
            # 使用正则表达式查看是否是图片
            isImage = re.search(checkIM, text)
            # 如果不是对象也不是图片,则continue
            if not isXObject or not isImage:
                continue
            imgcount += 1
            # 根据索引生成图像
            pix = fitz.Pixmap(doc, i)
            # 根据pdf的路径生成图片的名称
        #     new_name = path.replace('\\', '-') + "_img{}.png".format(imgcount)
            png_path = pdf_path.replace("pdf","png")
            print("图片路径:",png_path)
            # 如果pix.n<5,可以直接存为PNG
            if pix.n < 5:
                pix.writePNG(png_path)
            # 否则先转换CMYK
            else:
                pix0 = fitz.Pixmap(fitz.csRGB, pix)
                pix0.writePNG(png_path)
                pix0 = None
            # 释放资源
            pix = None
            t1 = time.clock()
            print("运行时间:{}s".format(t1 - t0))
            print("提取了{}张图片".format(imgcount))
            return png_path
        if __name__ == '__main__':
        # pdf_path:pdf文件路径
        pdf_path = r"C:\Users\xiahuadong\Desktop\PDF文字矫正代码\20200310c国发\20200310c国发0007.pdf"
        pdf2image(pdf_path)    
    
    展开全文
  • Python PDF转图片

    千次阅读 2019-10-10 17:32:21
    Python PDF转图片安装PyMuPDF运行代码 安装PyMuPDF pip install PyMuPDF 如果要能力就可以使用别的库,但是我试了几个库感觉还是这个库简单,也不需要修改系统环境变量。 运行代码 import fitz rotate = int(0) ...

    Python PDF转图片

    安装PyMuPDF

    pip install PyMuPDF
    

    如果要能力就可以使用别的库,但是我试了几个库感觉还是这个库简单,也不需要修改系统环境变量。

    运行代码

    import fitz
    rotate = int(0)
    zoom_x = 1.0
    zoom_y = 1.0
    trans = fitz.Matrix(zoom_x, zoom_y).preRotate(rotate)
    open_file_path =...’
    save_file_path = '...'
    
    pdf = fitz.open(open_file_path )
    for i in range(pdf.pageCount):
        pm = pdf[i].getPixmap(matrix=trans, alpha=False)
        pm.writePNG(save_file_path + '/%s.png' % i)
    
    展开全文
  • 前言:在最近的测试中遇到一个与PDF相关的测试需求,其中...下面首先分享一下PythonPDF转换成图片,Java后续有时间在进行分享。需求:我需要先将PDF转换成为PNG图片,并截取图片的一部分存储,然后作为测试目标进...

    前言:在最近的测试中遇到一个与PDF相关的测试需求,其中有一个过程是将PDF转换成图片,然后对图片进行测试。

    粗略的试了好几种方式,其中语言尝试了Python和Java,总体而言所找到的Python方式相对比Java更快一些,更简单一些。

    下面首先分享一下Python将PDF转换成图片,Java后续有时间在进行分享。

    需求:我需要先将PDF转换成为PNG图片,并截取图片的一部分存储,然后作为测试目标进行测试。

    操作:

    1、PDF转PNG图片

    2、对PNG图片进行指定区域截图,在另存到指定文件夹下

    1、PyMuPDF将PDF转换成图片

    import sys, fitzimport osimport datetimedef pyMuPDF_fitz(pdfPath, imagePath):startTime_pdf2img = datetime.datetime.now()#开始时间print("imagePath="+imagePath)pdfDoc = fitz.open(pdfPath)for pg in range(pdfDoc.pageCount):page = pdfDoc[pg]rotate = int(0)# 每个尺寸的缩放系数为1.3,这将为我们生成分辨率提高2.6的图像。# 此处若是不做设置,默认图片大小为:792X612, dpi=96zoom_x = 1.33333333 #(1.33333333-->1056x816) (2-->1584x1224)zoom_y = 1.33333333mat = fitz.Matrix(zoom_x, zoom_y).preRotate(rotate)pix = page.getPixmap(matrix=mat, alpha=False)if not os.path.exists(imagePath):#判断存放图片的文件夹是否存在os.makedirs(imagePath) # 若图片文件夹不存在就创建pix.writePNG(imagePath+'/'+'images_%s.png' % pg)#将图片写入指定的文件夹内endTime_pdf2img = datetime.datetime.now()#结束时间print('pdf2img时间=',(endTime_pdf2img - startTime_pdf2img).seconds)if __name__ == "__main__":pdfPath = '../path/demo.pdf'imagePath = '../path/image'pyMuPDF_fitz(pdfPath, imagePath)

    PDF文档页数超过100页的话需要十几秒,因为先转换成一整张1056X816的图片,再对本地文件中的所有图片进行遍历截图,时间上比较慢,通过查看文档发现:

    还可以在转换的同时指定图片的大小,对图片指定区域进行截取,这样快很多,一步到位,省去了二次截图的过程,前提是我们必须要知道想要截取哪一块区域并保存。

    官方示例代码如下:

    #下面的这段代码就是想要从一页PDF的中心点为起点截取到右下角的区域,截取整张图的1/4.>>> mat = fitz.Matrix(2, 2) # 在每个方向缩放因子2>>> rect = page.rect # 页面的矩形>>> mp = rect.tl + (rect.br - rect.tl) * 0.5 # 矩形的中心>>> clip = fitz.Rect(mp, rect.br) # 我们想要的剪切区域>>> pix = page.getPixmap(matrix = mat, clip = clip)

    实际用到的例子是:

    整张图片导出之后是1056*816,但是我想要的是这张图片最底部的部分1056*75,相当于PDF文档的页脚部分。

    import sys, fitzimport osimport datetimedef pyMuPDF_fitz(pdfPath, imagePath):startTime_pdf2img = datetime.datetime.now()#开始时间pdfDoc = fitz.open(pdfPath)for pg in range(pdfDoc.pageCount):page = pdfDoc[pg]rotate = int(0)# 每个尺寸的缩放系数为1.3,这将为我们生成分辨率提高2.6的图像。# 此处若是不做设置,默认图片大小为:792X612, dpi=96zoom_x = 1.33333333 #(1.33333333-->1056x816) (2-->1584x1224)zoom_y = 1.33333333mat = fitz.Matrix(zoom_x, zoom_y).preRotate(rotate)pix = page.getPixmap(matrix=mat, alpha=False)if not os.path.exists(imagePath):#判断存放图片的文件夹是否存在os.makedirs(imagePath) # 若图片文件夹不存在就创建pix.writePNG(imagePath+'/'+'images_%s.png' % pg)#将图片写入指定的文件夹内endTime_pdf2img = datetime.datetime.now()#结束时间print('pdf2img时间=',(endTime_pdf2img - startTime_pdf2img).seconds)def pyMuPDF2_fitz(pdfPath, imagePath):pdfDoc = fitz.open(pdfPath) # open documentfor pg in range(pdfDoc.pageCount): # iterate through the pagespage = pdfDoc[pg]rotate = int(0)# 每个尺寸的缩放系数为1.3,这将为我们生成分辨率提高2.6的图像# 此处若是不做设置,默认图片大小为:792X612, dpi=96zoom_x = 1.33333333 #(1.33333333-->1056x816) (2-->1584x1224)zoom_y = 1.33333333mat = fitz.Matrix(zoom_x, zoom_y).preRotate(rotate) # 缩放系数1.3在每个维度 .preRotate(rotate)是执行一个旋转rect = page.rect # 页面大小mp = rect.tl + (rect.bl - (0,75/zoom_x)) # 矩形区域 56=75/1.3333clip = fitz.Rect(mp, rect.br) # 想要截取的区域pix = page.getPixmap(matrix=mat, alpha=False, clip=clip) # 将页面转换为图像if not os.path.exists(imagePath):os.makedirs(imagePath)pix.writePNG(imagePath+'/'+'psReport_%s.png' % pg)# store image as a PNGif __name__ == "__main__":pdfPath = '../path/demo.pdf'imagePath = '../path/image'#pyMuPDF_fitz(pdfPath, imagePath)#只是转换图片pyMuPDF2_fitz(pdfPath, imagePath)#指定想要的区域转换成图片

    当然上面这种是综合下来最快的,另外PyMuPDF还可以对PDF进行追加删除之类的功能。

    下面再介绍一种方法pdf2image

    2、pdf2image将PDF转换成图片pdf2image也是个包装器,真正的转换工具是poppler

    GitHub地址:https://github.com/Belval/pdf2image,上面也有相关的配置说明。

    1、安装pdf2image: pip install pdf2image

    2、Windows安装配置poppler(这里只介绍Windows,Mac和Linux去上面Github地址里面参考官网)

    Windows用户必须为Windows安装poppler (http://blog.alivate.com.au/poppler-windows/),然后将bin/文件夹添加到PATH(开始>输入env>编辑系统环境变量>环境变量...>系统变量>Path)

    注意:这里配置之后需要重启一下电脑才会生效,不然会报如下错误:

    ERROE:FileNotFoundError: [WinError 2] The system cannot find the file specified

    During handling of the above exception, another exception occurred:

    3、pip install pillow (如果你还没有安装过的话)

    from pdf2image import convert_from_path,convert_from_bytesimport tempfilefrom pdf2image.exceptions import (PDFInfoNotInstalledError,PDFPageCountError,PDFSyntaxError)def pdf2image2(pdfPath, imagePath, pageNum):#方法一:#convert_from_path('a.pdf', dpi=500, "output",fmt="JPEG",output_file="ok",thread_count=4)#这会将a.pdf转换成在output文件夹下形如ok_线程id-页码.jpg的一些文件。#若不指定thread_count则默认为1,并且在文件名中显示id. 这种转换是直接写入到磁盘上的,因此不会占用太多内存。#下面的写法直接写入到内存,images = convert_from_path(pdfPath, dpi=96)for image in images:if not os.path.exists(imagePath):os.makedirs(imagePath)image.save(imagePath+'/'+'psReport_%s.png' % images.index(image), 'PNG')#方法二:images = convert_from_bytes(open('/home/belval/example.pdf', 'rb').read())for image in images:if not os.path.exists(imagePath):os.makedirs(imagePath)image.save(imagePath+'/'+'psReport_%s.png' % images.index(image), 'PNG')#方法三,也是最推荐的方法with tempfile.TemporaryDirectory() as path:images_from_path = convert_from_path(pdfPath, output_folder=path, dpi=96)for image in images_from_path:if not os.path.exists(imagePath):os.makedirs(imagePath)image.save(imagePath+'/'+'psReport_%s.png' % images_from_path.index(image), 'PNG')print(images_from_path)

    以下是参数定义:

    pdf_path -->要转换的PDF文档路径

    dpi -->DPI中的图像质量(默认为200),Windows默认为96dpi

    output_folder -->将生成的图像写入文件夹(而不是直接写入内存)若是path不做指定的话,path的默认地址是:C:\Users\pzhang7\AppData\Local\Temp\生成的uuid4。

    first_page -->从哪一页开始转换,默认是PDF的第一页

    last_page -->转换到哪一页,默认是PDF的最后一页

    fmt --> 输出图像格式默认格式是ppm,还可以设置为png和jpeg等

    thread_count -->允许生成多少个线程进行处理,一般不超过4个线程;

    userpw -->PDF的密码(若有密码的话需要添加)

    use_cropbox --> 使用cropbox而不是mediabox

    strict -->参数允许您使用自定义类型PDFSyntaxError捕获pdftoppm语法错误

    transparent -->参数允许生成没有背景的图像,而不是通常的白色图像(为此需要pdftocairo)

    single_file -->使用pdftoppm / pdftocairo中的-singlefile选项

    output_file --> 输出文件名是什么

    poppler_path -->查找poppler二进制文件的路径,允许用户使用poppler_path指定poppler的安装路径;默认不指定的话需要将bin添加到系统PATH

    pdf2image应该也可以对指定区域进行截取,暂时还没详细研究其方法,因为已经找到更快的方法解决问题了,对比如下所示:

    3、比较PyMuPDF和pdf2image

    以下是对一份75页的PDF,输出DPI=96的时间性能对比,pdf2image使用的是默认线程数,下面的对比并没有设置多线程,使用多线程会快一点,当线程数设为5的时候,速度是9秒。

    可以看出使用pyMuPDF_Fitz明显快一倍多,最终选取了这种方式。

    4、Wand将PDF转换成图片

    和pdf2image一样,wand都是包装接口(bindings),而实际进行转换的工具是ImageMagick.

    Wind官网:

    http://docs.wand-py.org/en/0.5.6/

    ImageMagick官网:

    https://imagemagick.org/script/download.php#windows

    from wand.image import Imagefilename="somefile.pdf"with(Image(filename=filename, resolution=120)) as source:images = source.sequencepages = len(images)for i in range(pages):n = i + 1newfilename = filename[:-4] + str(n) + '.jpeg'Image(images[i]).save(filename=newfilename)

    由于问题已经解决,而且性能也还不错,就没有具体去研究Wind这种方式了,感兴趣的可以去看看。

    万水千山总是情,点个“在看”行不行

    展开全文
  • 1 importpdfkit2 importrequests3 from bs4 importBeautifulSoup4 from PIL importImage5 from pdf2image importconvert_from_path678 defmain():9 header={10 "Accept": "text/html,application/xhtml+xml,...

    1 importpdfkit2 importrequests3 from bs4 importBeautifulSoup4 from PIL importImage5 from pdf2image importconvert_from_path6

    7

    8 defmain():9 header={10 "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3",11 "Referer": "http://192.168.10.10/kb/",12 "Accept-Language": "zh-CN,zh;q=0.9",13 "Content-Type": "application/x-www-form-urlencoded",14 "Accept-Encoding": "gzip, deflate",15 "Connection": "Keep-Alive",16 "User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36",17 "Accept-Encoding": "gzip, deflate",18 "Origin": "http://192.168.10.10",19 "Upgrade-Insecure-Requests": "1",20 "Cache-Control": "max-age=0",21 "Content-Length": "113"

    22 }23

    24 url = 'http://192.168.10.10/kb/index.php/kcb/kcb/submit' #这是所在学校的课表查询响应页面,外网不可访问!

    25

    26 yx = ["1院信息工程学院", "2院智能制造与控制术学院","3院外国语学院","4院经济与管理学院","5院艺术与设计学院"]27 ulist =[]28 n =029

    30 #自动获取班号

    31 kburl = 'http://192.168.10.10/kb/'#这是所在学校的课表查询查询页面,外网不可访问!

    32 r =requests.get(kburl)33 r.encoding =r.apparent_encoding34 soup2 = BeautifulSoup(r.text, 'html.parser')35 script = soup2.find('script', {'language': "JavaScript", 'type': "text/javascript"}) #获取js片段

    36 bjhs = script.text[13:-287].split(',\r\n\r\n') #截取js需求区间,以空格符号为界,此处对嵌入式js处理!

    37 bjh =[]38 for bjhx in range(5):39 a = bjhs[bjhx][1:-1].replace('"', '') #删除多余引号

    40 bjh.append(a.split(',')) #追加新数组,字符串转化为数组

    41

    42 #以下开始爬取课表

    43 path = input('请粘贴存储地址:') #手动输入文件保存地址44 for i ,j in zip(yx,bjh):#以学院进行外循环

    45 for g in range(len(j)):#以班号进行内循环

    46 data = {"province": i,47 "bjh": j[g],48 "Submit": "查 询"}#post查询提交参数

    49

    50 Gg = path + r'\\'+ str(j[g]) + '.html' #爬取网页暂存地址

    51 Pp = path + r'\\'+ str(j[g]) + '.pdf' #网页转pdf暂存地址

    52 Pu = path + r'\\'+ str(j[g]) + '.jpeg' #pdf转图片暂存地址

    53 r = requests.post(url,data=data,headers=header) #发起查询请求,获取响应页面

    54 soup = BeautifulSoup(r.content,'html.parser') #解析网页格式

    55 body = soup.find_all(name='body') #爬取响应内容的课表部分

    56 html = str(body) #转换内容格式,方便后续操作。(此处为调错添加)

    57 with open(Gg,'w',encoding='utf-8') as f: #保存爬取到的课表,html格式

    58 f.write(html)59 f.close()60

    61 #以上过程,课表爬取结束,初始爬取结果为html。以下为格式处理过程(html-pdf,pdf-.jpg)

    62 Pppath_wk = r'D:\wkhtmltopdf\bin\wkhtmltopdf.exe'#wkhtmltopdf安装位置

    63 #Pupath_wk = r'D:\wkhtmltopdf\bin\wkhtmltoimage.exe' #这里原准备用它pdf来转图片

    64 Ppconfig = pdfkit.configuration(wkhtmltopdf=Pppath_wk) #设置调用程序路径位置(环境变量)

    65 #Puconfig = pdfkit.configuration(wkhtmltopdf=Pupath_wk)

    66

    67

    68 options1 ={69 'page-size':'Letter',70 'encoding':'UTF-8',71 'custom-header': [('Accept-Encoding', 'gzip')]72 } #options1为设置保存pdf的格式

    73 '''options2 = {74 'page-size': 'Letter',75 'encoding': 'base64',76 'custom-header': [('Accept-Encoding', 'gzip')]77 }'''#options2为设置保存图片的格式,未使用到,注释以便后续研究

    78 pdfkit.from_file(Gg,Pp,options=options1,configuration=Ppconfig)#转换html文件为pdf

    79 #pdfkit.from_file(Gg,Pu,options=options2,configuration=Puconfig)

    80

    81 try:82 convert_from_path(Pp, 300, path, fmt="JPEG", output_file=str(j[g]), thread_count=1) #pdf转为图片格式,此处注意保存路径的设置!

    83

    84 except(OSError, NameError):85 pass

    86

    87 n+=1

    88 print('正在打印第%s张课表!' %n)89 print("*" * 100)90 print('%s打印完毕!'%str(i))91

    92

    93

    94 main()95

    96 '''

    97 **********第一版本需手动输入班级列表格式(供参考)************98 bjh = [99 ["10111501","10111502","10111503","10111504","10121501","10121502","10121503","10131501","10141501","10111503","10111504","10121503","ZB0111501","ZB0131501","ZB0141501","10111601","10111602","10111603","10121601","10121602","10131601","10141601","10161601","ZB0111601","ZB0121601","ZB0131601","10111701","10111702","10111703","10111704","10111705","10121701","10121702","10121703","10131701","10141701","10161701","ZB0111701","10211501","10211502","10211503","10211504","10211505","10221501","10221502","10221503","10231501","10231502","10241501","10241502","ZB0211501","ZB0221501","10211601","10211602","10221601","10231601","10241601","ZB0211601","ZB0221601","ZB0231601","10211701","10211702","10221701","10231701","10241701","ZB0211701","101011801","101011802","101011803","101011804","101021801","101021802","101021803","101031801","101041801","101051801","101051802","101061801","101071801","201011801","201051801"],100

    101 ["10611501","10611502","10611503","10611504","10621501","10641501","10641502","10641503","ZB0641501","ZB0611501","10611601","10611602","10611603","10621601","10641601","10641602","ZB0611601","ZB0641601","10611701","10611702","10621701","10641701","10641702","ZB0611701","10911501","10911502","10921501","10921502","10931501","10931502","ZB0911501","ZB0921501","10911601","10921601","10931601","10911701","10931701","102011801","102011802","102021801","102031801","102041801","102041802","102051801","202011801","202051801"],102

    103 ["10311501","10311502","10311503","10331501","10341501","ZB0311501","10311601","10311602","10311603","10311604","10311605","10311606","10321501","10321601","10331601","10331602","10341601","10351601","ZB0311601","10311701","10311702","10311703","10311704","10311705","10311706","10311707","10321701","10331701","10331702","10341701","10351701","ZB0311701","SX0341701","103011801","103011802","103011803","103011804","103011805","103011806","103011807","103011808","103011809","103031801","103031802","103041801","103051801","203011801"],104

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    110 **********制作人:秦小道************111 **********版本号:第二版************112 ********发布日期:2019.6.21*********113 '''

    展开全文
  • 之前在网上找了很多利用python程序实现图片格式转pdf文件的方法,发现不是操作过程麻烦,就是方法老旧已经失效,要不就是利用库PythonMagick可以实现这个功能,安装和实现过程巨麻烦。因此在外网找到简单的操作方法...
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  • 最近工作中需要把pdf文件转化为图片,想用python来实现,于是在网上找啊找啊找啊找,找了半天,倒是找到一些代码。1、第一个找到的代码,我试了一下好像是反了,只能实现把图片转为pdf,而不能把pdf转为图片。。。...
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  • code save_path='./doutu/'+img_url.split('/')[-1] # print save_path # sys.exit() with open(save_path, 'wb') as f: print u'正在下载'+img_url.split('/')[-1] f.write(img_content) 多线程 调用下载图片方法 ...
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  • Python 3.6.1 Mac OSX关于Tesseract,我尝试了很多不同的示例/模板代码,我在网上找到了PDF-&gt;Text和Image-&gt;Text。他们似乎都不管用。在请告诉我,如果你知道一个有效的代码,或一个网站有一个很好的...
  • pdf文件成文本 pdf文件按页图片 windows 这是个很小众的东西,网上很多都不能用,很折腾人。
  • Python进行PDF转图片pdfplumber的可视化调试使用pdfplumber这个Python工具库,pdfplumber基于pdfminer.six。使用pdfplumber进行PDF转图片,简单快捷。同时pdfplumber还提供可视化的PDF内容提取调试支持,如上图。...
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  • import osimport sysfrom reportlab.lib.pagesizes import A4, landscapefrom reportlab.pdfgen import canvas'''遍历当前目录下所有的jpg文件,并按照文件夹名称合并成pdf文档python 3.4.4图片文件用数字按顺序命名'...
  • 本篇文章记录如何使用pythonpdf文件切分成一张一张图片,包括环境配置、版本兼容问题。环境配置(mac)安装ImageMagickbrew install imagemagick这里有个坑,brew安装都是7.x版本,使用wand时会出错,需要你安装6.x...
  • Python3 PDF转图片

    千次阅读 2019-10-28 16:23:11
    最近要把PDF转换为png图片,用到了Pythonpdf2image模块。 pdf2image是对pdftoppm和pdftocairo的封装,可以转换PDF到PIL图片对象。 安装 pip install pdf2image windows下还需要下载poppler,并且把bin/目录加到...
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  • 原标题:20多行 Python 代码优雅搞定 PDF 转换成图片源/ 程序员大咖本文利用 PyPDF包来处理 PDF文件,为了方便快捷,我这里直接将一个页面转换成图片,就不需要去识别页面中的每一个 PDF元素了,这是没必要的。...
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  • 上一篇文章中已经介绍了简单的python爬网页下载文档,但下载后的文档多为doc或pdf,对于数据处理仍然有很多限制,所以将doc/pdf转换成txt显得尤为重要。查找了很多资料,在linux下要将doc转换成txt确实有难度,所以...

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