blocks|key|3153163|text|我使用了一个自制的脚本，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3153164|3153165|将两个|unordered-list-item|3153166|中的所有页面转换为位图PDF+1的页面从PDF白色到PDF+2的透明页面|3153167|将PDF+2中的每个页面覆盖在PDF+1的相应页面之上|3153168|在多核上并行运行转换/着色和叠加|3153169|3153170|使用的软件：|3153171|用于着色、透明度和overlay|3153172|inotify的|3153173|GhostScript，用于同步支持PNG的并行processes|3153174|any图像查看器，用于查看结果|3153175|3153176|3153177|优点：|3153178|使用的|3153179|simple+implementation|3153180|all工具是开源的|3153181|，非常适合查找布局|3153182|中的细微差别|3153183|缺点：|3153184|3153185|转换很慢|3153186|PDF之间的主要差异(例如分页)导致混乱|3153187|位图不适用于黑白文本和图表|3153188|没有易于使用的|3153189|<|3153190|>F241|3153191|3153192|我一直在寻找一个工具，可以做同样的PDF/PostScript级别。|3153193|下面是我们的脚本调用实用程序的方式(请注意，ImageMagick在幕后使用GhostScript进行PDF->PNG转换)：|3153194|$+convert+-density+150x150+-fill+red+-opaque+black+%2Bantialias+1.pdf+back%2502d.png
$+convert+-density+150x150+-transparent+white+%2Bantialias+2.pdf+front%2502d.png
$+composite+front01.png+back01.png+result01.png+#+do+this+for+all+pairs+of+images|code-block|syntax|javascript|3153195|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|21|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|22|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|23|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|24|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|25|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|26|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|27|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|28|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|29|8|@]|9|@]|A|$]]|$1|Q|3|R|5|E|7|2A|8|@]|9|@]|A|$]]|$1|S|3|T|5|E|7|2B|8|@]|9|@]|A|$]]|$1|U|3|V|5|E|7|2C|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|2E|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|2F|8|@]|9|@]|A|$]]|$1|10|3|11|5|6|7|2G|8|@]|9|@]|A|$]]|$1|12|3|13|5|E|7|2H|8|@]|9|@]|A|$]]|$1|14|3|15|5|E|7|2I|8|@]|9|@]|A|$]]|$1|16|3|17|5|E|7|2J|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2K|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|2L|8|@]|9|@]|A|$]]|$1|1C|3|-4|5|6|7|2M|8|@]|9|@]|A|$]]|$1|1D|3|1E|5|E|7|2N|8|@]|9|@]|A|$]]|$1|1F|3|1G|5|E|7|2O|8|@]|9|@]|A|$]]|$1|1H|3|1I|5|E|7|2P|8|@]|9|@]|A|$]]|$1|1J|3|1K|5|E|7|2Q|8|@]|9|@]|A|$]]|$1|1L|3|1M|5|6|7|2R|8|@]|9|@]|A|$]]|$1|1N|3|1O|5|E|7|2S|8|@]|9|@]|A|$]]|$1|1P|3|-4|5|6|7|2T|8|@]|9|@]|A|$]]|$1|1Q|3|1R|5|6|7|2U|8|@]|9|@]|A|$]]|$1|1S|3|1T|5|6|7|2V|8|@]|9|@]|A|$]]|$1|1U|3|1V|5|1W|7|2W|8|@]|9|@]|A|$1X|1Y]]|$1|1Z|3|-4|5|6|7|2X|8|@]|9|@]|A|$]]]|20|$]]

I've used a home-baked script which

<ul>
<li>converts all pages on two PDFs to bitmaps</li>
<li>colors pages of PDF 1 to red-on-white</li>
<li>changes white to transparent on pages of PDF 2</li>
<li>overlays each page from PDF 2 on top of the corresponding page from PDF 1</li>
<li>runs conversion/coloring and overlaying in parallel on multiple cores</li>
</ul>

Software used:

<ul>
<li>GhostScript for PDF-to-bitmap conversion</li>
<li>ImageMagick for coloring, transparency and overlay</li>
<li>inotify for synchronizing parallel processes</li>
<li>any PNG-capable image viewer for reviewing the result</li>
</ul>

Pros:

<ul>
<li>simple implementation</li>
<li>all tools used are open source</li>
<li>great for finding small differences in layout</li>
</ul>

Cons:

<ul>
<li>the conversion is slow</li>
<li>major differences between PDFs (e.g. pagination) result in a mess</li>
<li>bitmaps are not zoomable</li>
<li>only works well for black-and-white text and diagrams</li>
<li>no easy-to-use GUI</li>
</ul>

I've been looking for a tool which would do the same on PDF/PostScript level.

Here's how our script invokes the utilities (note that ImageMagick uses GhostScript behind the scenes to do the PDF->PNG conversion):

<pre><code>$ convert -density 150x150 -fill red -opaque black +antialias 1.pdf back%02d.png
$ convert -density 150x150 -transparent white +antialias 2.pdf front%02d.png
$ composite front01.png back01.png result01.png # do this for all pairs of images
</code></pre>

blocks|key|3153231|text|我们还使用了pdftotext+(参见Sklivvz的答案)来生成PDF的ASCII版本，并使用wdiff对它们进行比较。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3153232|使用pdftotext的-layout开关来增强可读性，并了解布局中的一些变化。|style|CODE|3153233|要从wdiff获得漂亮的彩色输出，请使用以下包装器脚本：|3153234|#!/bin/sh
RED=$'\e'"[1;31m"
GREEN=$'\e'"[1;32m"
RESET=$'\e'"[0m"
wdiff+-w$RED+-x$RESET+-y$GREEN+-z$RESET+-n+$1+$2|code-block|syntax|javascript|3153235|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Pdftotext|1|http://www.gnu.org/software/wdiff/^0|6|9|0|1C|5|1|0|C|7|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@$A|16|B|17|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|19|8|@]|9|@]|C|$M|N]]|$1|O|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

We've also used <a href="http://en.wikipedia.org/wiki/Pdftotext" rel="noreferrer">pdftotext</a> (see Sklivvz's answer) to generate ASCII versions of PDFs and <a href="http://www.gnu.org/software/wdiff/" rel="noreferrer">wdiff</a> to compare them.

Use pdftotext's <code>-layout</code> switch to enhance readability and get some idea of changes in the layout.

To get nice colored output from wdiff, use this wrapper script:

<pre><code>#!/bin/sh
RED=$'\e'"[1;31m"
GREEN=$'\e'"[1;32m"
RESET=$'\e'"[0m"
wdiff -w$RED -x$RESET -y$GREEN -z$RESET -n $1 $2
</code></pre>

blocks|key|3366198|text|因为没有这样的工具，所以我们已经编写了一个。您可以下载i-net+PDF+content+comparer并使用它。我希望这能帮助其他人解决同样的问题。如果您对它有问题，或者您对我们有反馈，那么您可以联系我们的支持。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3366199|​|3366200|📷|atomic|3366201|3366202|entityMap|0|LINK|mutability|MUTABLE|url|http://www.inetsoftware.de/products/pdf-content-comparer|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e2f355a7b987bd99c2eba2f56c29dae6.png|imageAlt^0|R|Q|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|I|3|E|5|6|7|16|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]|R|$5|S|N|T|C|$U|V|W|-4]]]]

Because there is no such tool available that we have written one. You can download the <a href="http://www.inetsoftware.de/products/pdf-content-comparer" rel="noreferrer">i-net PDF content comparer</a> and use it. I hope that help other with the same problem. If you have problems with it or you have feedback for us then you can contact our support.

<img src="https://i.stack.imgur.com/CvV5W.png" alt="enter image description here">

blocks|key|3153329|text|蓝光pdf软件将为你做这件事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3153330|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blubeam pdf software will do this for you

blocks|key|3366238|text|您可以批处理compare+pdf文件与Tarkware+Pdf比较器。但它不是免费的，需要Adobe+Acrobat。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3366239|entityMap|0|LINK|mutability|MUTABLE|url|http://www.tarkware.com/comparer.html^0|6|B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You can batch <a href="http://www.tarkware.com/comparer.html" rel="nofollow noreferrer">compare pdf</a> files with Tarkware Pdf Comparer. But it's not free and requires Adobe Acrobat.

blocks|key|3153401|text|我们的产品--+http://www.premediasystems.com/pdfc.html“--将非常优雅和高效地完成这项工作，它也不是免费的，而且是Mac独有的应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3153402|entityMap|0|LINK|mutability|MUTABLE|url|http://www.premediasystems.com/pdfc.html^0|8|14|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Our product, PDF Comparator - <a href="http://www.premediasystems.com/pdfc.html" rel="nofollow noreferrer">http://www.premediasystems.com/pdfc.html</a>" - will do this quite elegantly and efficiently. It's also not free, and is a Mac OS X only application.

blocks|key|360929|text|根据您的需要，转换为文本的解决方案将是最简单和最直接的。我确实认为位图的想法很酷。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|360930|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Based on your needs, a convert to text solution would be the easiest and most direct. I did think the bitmap idea was pretty cool.

blocks|key|3366311|text|实际上有一个diffpdf工具。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3366312|http://www.qtrac.eu/diffpdf.html|offset|length|3366313|它的缺点是，当添加内容使新文本部分转移到新页面时，它不会做出很好的反应。例如，如果要将旧的第4页与第5页的末尾和第6页的开头进行比较，则需要移动参数以分别比较这两个分片。|3366314|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|W|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

There is actually a diffpdf tool.

<a href="http://www.qtrac.eu/diffpdf.html">http://www.qtrac.eu/diffpdf.html</a>

Its weakness is that it doesn't react well when additions make new text shift partially to a new page. For instance, if old page 4 should be compared to the end of page 5 and the beginning of page 6, you'll need to shift parameters to compare the two slices separately.

blocks|key|3366335|text|我似乎无法在这里看到这一点，所以这里是:通过superuser:+How+to+compare+the+differences+between+two+PDF+files?+(answer+#229891,+by+@slestak)，有|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3366336|https://github.com/vslavik/diff-pdf|3366337|(+Ubuntu+Natty的构建步骤可以在get-diff-pdf.sh中找到)|3366338|据我所知，它基本上覆盖了pdf(s)中每个页面的文本/图形，允许您轻松查看是否有任何更改……|3366339|干杯!|3366340|entityMap|0|LINK|mutability|MUTABLE|url|https://superuser.com/questions/46123/how-to-compare-the-differences-between-two-pdf-files/229891#229891|1|2|http://sdaaubckp.svn.sourceforge.net/viewvc/sdaaubckp/source-build-scripts/get-diff-pdf.sh?content-type=text%252Fplain^0|M|2M|0|0|0|Z|1|0|M|F|2|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@$A|15|B|16|1|17]]|C|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|19|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]|T|$5|O|P|Q|C|$R|E]]|U|$5|O|P|Q|C|$R|V]]]]

I don't seem to be able to see this here, so here it is: via <a href="https://superuser.com/questions/46123/how-to-compare-the-differences-between-two-pdf-files/229891#229891">superuser: How to compare the differences between two PDF files? (answer #229891, by @slestak)</a>, there is 

<a href="https://github.com/vslavik/diff-pdf" rel="nofollow noreferrer">https://github.com/vslavik/diff-pdf</a>

(build steps for Ubuntu Natty can be found in <a href="http://sdaaubckp.svn.sourceforge.net/viewvc/sdaaubckp/source-build-scripts/get-diff-pdf.sh?content-type=text%2Fplain" rel="nofollow noreferrer">get-diff-pdf.sh</a>)

As far as I can see, it basically overlays the text/graphics of each page in the pdf(s), allowing you to easily see if there were any changes... 

Cheers!

I need to compare large count of PDF files for it optical content. Because the PDF files was created on different platforms and with different versions of the software there are structural differences. For example:

<ul>
<li>the chunking of text can be different</li>
<li>the write order can be different</li>
<li>the position can be differ some pixels</li>
</ul>

It should compare the content like a human people and not the internal structure. I want test for regressions between different versions of the PDF generator that we used.

Tool to compare large numbers of PDF files?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我需要比较大量的PDF文件的光学内容。由于PDF文件是在不同的平台上创建的，并且软件的版本不同，因此存在结构上的差异。例如：文本的分块可以是不同的写顺序可以是不同的位置可以是不同的像素它应该像人类一样比较内容，而不是内部结构。我想测试我们使用的PDF生成器的不同版本之间的回归。

问比较大量PDF文件的工具？
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问比较大量PDF文件的工具？
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