『Python笔记』依据pdf2image批量将pdf文件转换成png图片！

曾经终败给现在 2022-11-22 05:19 413阅读 0赞

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   <td><font>依据pdf2image批量将pdf文件转换成png图片！</font> </td> 
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### 文章目录 ###

*  1. 安装pdf2image
 *  2. 导入环境变量
 *  3. Python代码
 *  4. 参考文章

>  *  提取图片或将每个页面从PDF保存为JPG：[https://smallpdf.com/cn/pdf-to-jpg][https_smallpdf.com_cn_pdf-to-jpg]

# 1. 安装pdf2image #

>  *  **首先安装pdf2image包：**

conda install -c conda-forge poppler
    pip install pdf2image
    # 或者直接：
    conda install pdf2image

# 2. 导入环境变量 #

>  *  **pdf2image是包装器，poppler是转换过程真正需要的**
>  *  用curl下载：[http://blog.alivate.com.au/wp-content/uploads/2018/10/poppler-0.68.0\_x86.7z][http_blog.alivate.com.au_wp-content_uploads_2018_10_poppler-0.68.0_x86.7z]，解压后，把bin目录添加到PATH环境变量里。

# 3. Python代码 #

>  *  **代码如下**

from pdf2image import convert_from_path
    import os
    import cv2
    
    
    """ 
    @zhangkaifang 2020-11-02，这里为了统一格式，方便后续处理。
    ①、因为后续操作的png图像尺寸都是[3480*2433]的大小，这里直接将pdf转成该尺寸。
    ②、原PDF的大小是 [20.40*14.26 inch], 3480/20.40=170.588约数。意思是每个英寸扫描170个点。
    """
    
    path_all_pdf = './PDF'                    # 存放pdf的文件目录
    pdf_all = os.listdir(path_all_pdf)        # 所有的pdf文件列表
    
    outfile = './PNG'
    if not os.path.exists(outfile):           # 用来保存解析出来的PNG文件目录
        os.mkdir(outfile)
    
    i = 1
    for pdf_name in pdf_all:
        pdf_one = os.path.join(path_all_pdf, pdf_name)
        pages = convert_from_path(pdf_one, 175, thread_count=8)
        png_name = pdf_name.replace('.pdf', '.png')
        png_path = os.path.join(outfile, png_name)
        for page in pages:
            page.save(png_path, 'PNG')
        #==============================
        im1 = cv2.imread(png_path)
        im2 = cv2.resize(im1, (2433, 3480))   # 为图片重新指定尺寸
        cv2.imwrite(png_path, im2)
        print("自动转换第", i, "个pdf文件!", "=========", pdf_name, "图像尺寸：", im2.shape)
        i = i + 1

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FiYzEzNTI2MjIyMTYw_size_16_color_FFFFFF_t_70][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FiYzEzNTI2MjIyMTYw_size_16_color_FFFFFF_t_70 1][]

# 4. 参考文章 #

>  *  [Python报错：PermissionError: \[Errno 13\] Permission denied解决方案详解][Python_PermissionError_ _Errno 13_ Permission denied]
>  *  [Python PDF转image方法小结][Python PDF_image]
>  *  [利用pdf2image，将pdf文件转换成图片][pdf2image_pdf]
>  *  [debian使用pdf2image包 将pdf转化成图片 Poppler安装出问题][Python_PermissionError_ _Errno 13_ Permission denied]

[https_smallpdf.com_cn_pdf-to-jpg]: https://smallpdf.com/cn/pdf-to-jpg
[http_blog.alivate.com.au_wp-content_uploads_2018_10_poppler-0.68.0_x86.7z]: http://blog.alivate.com.au/wp-content/uploads/2018/10/poppler-0.68.0_x86.7z
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FiYzEzNTI2MjIyMTYw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20201105095131532.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FiYzEzNTI2MjIyMTYw,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FiYzEzNTI2MjIyMTYw_size_16_color_FFFFFF_t_70 1]: /images/20221120/5b3819115e7947b18fefb6efa7afd31f.png
[Python_PermissionError_ _Errno 13_ Permission denied]: https://blog.csdn.net/qq_42345446/article/details/101695124
[Python PDF_image]: https://blog.csdn.net/Kiritow/article/details/88176199?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.compare&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.compare
[pdf2image_pdf]: https://blog.csdn.net/wss794/article/details/88243956