blocks|key|1572868|text|这真的取决于你的期望。简单的PDF417读起来很快，就像...this或this。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1572869|This永远不会被扫描。|1572870|Borderline是指小的或中等复杂的东西：example+1和example+2。|1572871|我可以读取第一个，但不能读取第二个，尽管第一个更密集--大小会有所帮助。|1572872|确保启用PDF417解码；默认情况下是关闭的，静默区(代码周围的空格)+is+required|1572873|Focus+|unordered-list-item|1572874|1572875|+lot|1572876|1572877|1572878|entityMap|0|LINK|mutability|MUTABLE|url|http://labloguera.net/blogs/jalbert/pdf417sd_thumb_26D74651.png|1|http://www.officialeancode.com/sample_codes/2D%2520PDF417%2520code.jpg|2|http://img.tfd.com/cde/_PDF417.GIF|3|http://mdn.morovia.com/manuals/bax3/images/pdf417-sample1.gif|4|http://www.carolinabarcode.com/images/ArticleImages/Symbology/PDF417-Barcode.jpg^0|V|4|0|10|4|1|0|0|4|2|0|N|9|3|X|9|4|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]|$A|1D|B|1E|1|1F]]|C|$]]|$1|D|3|E|5|6|7|1G|8|@]|9|@$A|1H|B|1I|1|1J]]|C|$]]|$1|F|3|G|5|6|7|1K|8|@]|9|@$A|1L|B|1M|1|1N]|$A|1O|B|1P|1|1Q]]|C|$]]|$1|H|3|I|5|6|7|1R|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|1S|8|@]|9|@]|C|$]]|$1|L|3|M|5|N|7|1T|8|@]|9|@]|C|$]]|$1|O|3|-4|5|N|7|1U|8|@]|9|@]|C|$]]|$1|P|3|Q|5|N|7|1V|8|@]|9|@]|C|$]]|$1|R|3|-4|5|6|7|1W|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1X|8|@]|9|@]|C|$]]|$1|T|3|-4|5|6|7|1Y|8|@]|9|@]|C|$]]]|U|$V|$5|W|X|Y|C|$Z|10]]|11|$5|W|X|Y|C|$Z|12]]|13|$5|W|X|Y|C|$Z|14]]|15|$5|W|X|Y|C|$Z|16]]|17|$5|W|X|Y|C|$Z|18]]]]

It really depends on what you expect. Simple PDF417 reads pretty instantly, like... <a href="http://labloguera.net/blogs/jalbert/pdf417sd_thumb_26D74651.png" rel="noreferrer">this</a> or <a href="http://www.officialeancode.com/sample_codes/2D%20PDF417%20code.jpg" rel="noreferrer">this</a>.

<a href="http://img.tfd.com/cde/_PDF417.GIF" rel="noreferrer">This</a> will never be scanned.

Borderline is stuff that is small or moderately complex: <a href="http://mdn.morovia.com/manuals/bax3/images/pdf417-sample1.gif" rel="noreferrer">example 1</a> and <a href="http://www.carolinabarcode.com/images/ArticleImages/Symbology/PDF417-Barcode.jpg" rel="noreferrer">example 2</a>.

I can read the first but not the second, even though the first is denser -- size helps.

<ul>
<li>Make sure to enable PDF 417 decoding; it's off by default</li>
<li>Quiet zone (white space around the code) is required</li>
<li>Focus and light help a lot</li>
</ul>

blocks|key|1577064|text|您可以试用PDF417.mobi+SDK。如果配备了自动对焦摄像头，它应该可以在低端手机上使用。它是一个商业库，但对开发人员和非商业目的是免费的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1577065|您可以试用演示here或直接使用GitHub中的代码。官方网站在这里http://pdf417.mobi/|offset|length|1577066|免责声明:我是PDF417.mobi团队的一员|1577067|entityMap|0|LINK|mutability|MUTABLE|url|https://play.google.com/store/apps/details?id=mobi.pdf417|1|https://github.com/PDF417/android|2|http://pdf417.mobi/^0|0|7|4|0|G|6|1|Y|J|2|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]|$D|Y|E|Z|1|10]|$D|11|E|12|1|13]]|A|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]|R|$5|K|L|M|A|$N|S]]]]

You can try PDF417.mobi SDK. It should work on low-end phones if equipped with auto-focus camera. It's a commercial library, but free for developers and non-commercial purposes.

You can try the demo <a href="https://play.google.com/store/apps/details?id=mobi.pdf417" rel="nofollow">here</a> or play with code directly from <a href="https://github.com/PDF417/android" rel="nofollow">GitHub</a>.
Official web site is here <a href="http://pdf417.mobi/" rel="nofollow">http://pdf417.mobi/</a>

Disclaimer: I'm part of the team working on PDF417.mobi

blocks|key|4686776|text|已经使用过，它可以扫描PDF417格式。请务必尝试使用包含自动对焦相机的小工具。我已经在三星Galaxy+Tab上试用过了，它工作起来就像一个护身符。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4686777|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|$]]

Have used , It can scan PDF417 format. Make sure you give a try with a Gadget containing Auto Focus camera. Have tried It on Samsung Galaxy Tab it works like a charm.

blocks|key|1572901|text|Zxing的解决方案对我不起作用。我使用DataSymbol解码器(打开2d代码，默认情况下它们是关闭的)在我的三星充电。不到一秒我就拿到了驾照...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1572902|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|$]]

Zxing's solution did not work for me. I used DataSymbol Decoder (turn on 2d codes, by default they are off) on my samsung charge. In less than a second I captured my drivers license...

blocks|key|1577081|text|谷歌的ML+KIT+Barcode+Scanning是谷歌移动视觉库的一部分，它列出了对PDF417条形码的支持。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1577082|它自动解析以下支持格式的二维码、数据矩阵、PDF-417和Aztec值：|1577083|1577084|URL|unordered-list-item|1577085|Contact信息(电子名片等)和日历event|1577086|Email|1577087|Phone|1577088|SMS|1577089|ISBN|1577090|WiFi|1577091|Geo-location+(latitude+|1577092|+longitude)|1577093|AAMVA+|1577094|+license/ID|1577095|1577096|查看Getting+Started+Page或克隆GIT+project以开始使用。|1577097|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.google.com/ml-kit/vision/barcode-scanning|1|https://developers.google.com/ml-kit/vision/barcode-scanning/android|2|https://github.com/googlesamples/mlkit/tree/master/android/vision-quickstart^0|3|N|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|2|K|1|P|B|2|0^^$0|@$1|2|3|4|5|6|7|1I|8|@]|9|@$A|1J|B|1K|1|1L]]|C|$]]|$1|D|3|E|5|6|7|1M|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|1N|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|1O|8|@]|9|@]|C|$]]|$1|J|3|K|5|I|7|1P|8|@]|9|@]|C|$]]|$1|L|3|M|5|I|7|1Q|8|@]|9|@]|C|$]]|$1|N|3|O|5|I|7|1R|8|@]|9|@]|C|$]]|$1|P|3|Q|5|I|7|1S|8|@]|9|@]|C|$]]|$1|R|3|S|5|I|7|1T|8|@]|9|@]|C|$]]|$1|T|3|U|5|I|7|1U|8|@]|9|@]|C|$]]|$1|V|3|W|5|I|7|1V|8|@]|9|@]|C|$]]|$1|X|3|Y|5|6|7|1W|8|@]|9|@]|C|$]]|$1|Z|3|10|5|I|7|1X|8|@]|9|@]|C|$]]|$1|11|3|12|5|I|7|1Y|8|@]|9|@]|C|$]]|$1|13|3|-4|5|6|7|1Z|8|@]|9|@]|C|$]]|$1|14|3|15|5|6|7|20|8|@]|9|@$A|21|B|22|1|23]|$A|24|B|25|1|26]]|C|$]]|$1|16|3|-4|5|6|7|27|8|@]|9|@]|C|$]]]|17|$18|$5|19|1A|1B|C|$1C|1D]]|1E|$5|19|1A|1B|C|$1C|1F]]|1G|$5|19|1A|1B|C|$1C|1H]]]]

Google's <a href="https://developers.google.com/ml-kit/vision/barcode-scanning" rel="nofollow noreferrer">ML KIT Barcode Scanning</a> which is part of google's Mobile Vision library lists support for PDF-417 Barcodes.
It automatically parses QR Codes, Data Matrix, PDF-417, and Aztec values, for the following supported formats:
<ul>
<li>URL</li>
<li>Contact information (VCARD, etc.)</li>
<li>Calendar event</li>
<li>Email</li>
<li>Phone</li>
<li>SMS</li>
<li>ISBN</li>
<li>WiFi</li>
<li>Geo-location (latitude and longitude)</li>
<li>AAMVA driver license/ID</li>
</ul>
Review the <a href="https://developers.google.com/ml-kit/vision/barcode-scanning/android" rel="nofollow noreferrer">Getting Started Page</a> or clone <a href="https://github.com/googlesamples/mlkit/tree/master/android/vision-quickstart" rel="nofollow noreferrer">GIT project</a> to get started.

blocks|key|649494|text|我得到了与@sean-owen所描述的类似的结果，因为只有简单的PDF417被读取。感觉ZXing库对PDF417没有二维码那样的纠错功能。然而，在用户的帮助下，我们能够消除噪音，并通过以下方式创建一个人工安静区域：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|649495|649496|要求用户将手机置于横向模式(这可以最大化从相机捕获的像素，即使在640x480模式下也是如此)|unordered-list-item|649497|要求用户将条形码放入50:18的裁剪矩形内(此比例似乎最适合美国驾照，这样的裁剪矩形将使用户能够裁剪掉大部分噪声)|649498|允许用户控制焦点，倾斜扭曲|649499|649500|通过以上步骤，甚至可以扫描出一些出了名的难处理的PDF417图像。|649501|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|S|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

I got similar results as described by @sean-owen in that only the simple PDF417 were being read. It feels like the ZXing library doesn't have the same error correction for PDF417 that it does for QR Codes. However, with user assistance we were able to eliminate noise and create an artificial quiet zone by:

<ul>
<li>require the user to hold the phone in landscape mode (this maximizes the pixels captured from the camera, even in 640x480 mode)</li>
<li>require the user to fit the barcode inside a 50:18 clipping rectangle (this ratio seems to best fit the US Driver's License and such a clipping rectangle will empower the user to clip away most of the noise)</li>
<li>allow the user control focus, tilt distortions</li>
</ul>

By following the above, even some of the notoriously difficult PDF417 images can be scanned.

Was anybody able to read the <a href="http://en.wikipedia.org/wiki/PDF417" rel="noreferrer">PDF417</a> barcode with use of the <a href="http://code.google.com/p/zxing/" rel="noreferrer">ZXing</a> library on the Android OS? They are supporting this - and according to their page it is in 'alpha' stage.

We are not looking for perfect solution - since the PDF417 is pretty complex and needs a very good camera with auto-focus, we can accept that it will be working only on few pre-selected high end devices.

We have tried also the <a href="http://srowen.com/bsplus/" rel="noreferrer">Barcode Scanner +</a> available on the Android Market - it has the PDF417 option in the settings, but whatever we read it always fails.

We were looking also for commercial SDK, also here on stackoverflow, but with no luck.

Any help is appreciated.

Kind Regards,
STeN

ZXing on Android PDF417

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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有没有人能够在安卓操作系统上使用库来读取条形码？他们正在支持这一点-根据他们的页面，这是在'alpha‘阶段。我们不是在寻找完美的解决方案--因为PDF417相当复杂，需要一个非常好的自动对焦摄像头，我们可以接受它只能在少数预选的高端设备上工作。我们也尝试了安卓市场上的 -它在设置中有PDF417选项，但无论我们读到什么，它总是失败。我们也在寻找商业SDK，同样在stackoverflow上，但没

问安卓PDF417上的ZXing
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