在python中从PDF中提取图像而不重新采样？ [英] Extract images from PDF without resampling, in python?

问题描述

如何以原始分辨率和格式从pdf文档中提取所有图像？ （意思是提取tiff为tiff，jpeg为jpeg等，无需重新采样）。布局是不重要的，我不在乎源图像位于页面上。

How might one extract all images from a pdf document, at native resolution and format? (Meaning extract tiff as tiff, jpeg as jpeg, etc. and without resampling). Layout is unimportant, I don't care were the source image is located on the page.

我正在使用python 2.7，但如果需要可以使用3.x. / p>

I'm using python 2.7 but can use 3.x if required.

推荐答案

通常在PDF中，图像只是按原样存储。例如，插入了jpg的PDF将在中间的某个位置具有一个字节范围，当提取时这些字节是有效的jpg文件。您可以使用它非常简单地从PDF中提取字节范围。我前段时间写过这篇文章的示例代码：从PDF中提取JPG 。

Often in a PDF, the image is simply stored as-is. For example, a PDF with a jpg inserted will have a range of bytes somewhere in the middle that when extracted is a valid jpg file. You can use this to very simply extract byte ranges from the PDF. I wrote about this some time ago, with sample code: Extracting JPGs from PDFs.

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