blocks|key|5426074|text|我有一个同事在做ZXing+(“斑马穿越”)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5426075|它有各种各样的平台支持。|5426076|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/zxing/^0|8|5|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

I have a colleague who worked on <a href="http://code.google.com/p/zxing/" rel="noreferrer">ZXing</a> ("Zebra Crossing").

That's got a fair variety of platform support.

blocks|key|4015388|text|QR+Code+Demystified+-+Part+1|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4015389|QR+Code+Demystified+-+Part+2|4015390|QR+Code+Demystified+-+Part+3|4015391|QR+Code+Demystified+-+Part+4|4015392|QR+Code+Demystified+-+Part+5|4015393|QR+Code+Demystified+-+Part+6|4015394|和|4015395|http://www.thonky.com/qr-code-tutorial/introduction/|4015396|要了解其背后的数学理论，可以在Math+Stackexchange中进行讨论|4015397|https://math.stackexchange.com/questions/76045/reed-solomon-polynomial-generator|4015398|entityMap|0|LINK|mutability|MUTABLE|url|https://www.matchadesign.com/news/blog/qr-code-demystified-part-1/|1|https://www.matchadesign.com/news/blog/qr-code-demystified-part-2/|2|https://www.matchadesign.com/news/blog/qr-code-demystified-part-3/|3|https://www.matchadesign.com/news/blog/qr-code-demystified-part-4/|4|https://www.matchadesign.com/news/blog/qr-code-demystified-part-5/|5|https://www.matchadesign.com/news/blog/qr-code-demystified-part-6/|6|7^0|0|S|0|0|0|S|1|0|0|S|2|0|0|S|3|0|0|S|4|0|0|S|5|0|0|0|1G|6|0|0|0|28|7|0^^$0|@$1|2|3|4|5|6|7|1F|8|@]|9|@$A|1G|B|1H|1|1I]]|C|$]]|$1|D|3|E|5|6|7|1J|8|@]|9|@$A|1K|B|1L|1|1M]]|C|$]]|$1|F|3|G|5|6|7|1N|8|@]|9|@$A|1O|B|1P|1|1Q]]|C|$]]|$1|H|3|I|5|6|7|1R|8|@]|9|@$A|1S|B|1T|1|1U]]|C|$]]|$1|J|3|K|5|6|7|1V|8|@]|9|@$A|1W|B|1X|1|1Y]]|C|$]]|$1|L|3|M|5|6|7|1Z|8|@]|9|@$A|20|B|21|1|22]]|C|$]]|$1|N|3|O|5|6|7|23|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|24|8|@]|9|@$A|25|B|26|1|27]]|C|$]]|$1|R|3|S|5|6|7|28|8|@]|9|@]|C|$]]|$1|T|3|U|5|6|7|29|8|@]|9|@$A|2A|B|2B|1|2C]]|C|$]]|$1|V|3|-4|5|6|7|2D|8|@]|9|@]|C|$]]]|W|$X|$5|Y|Z|10|C|$11|12]]|13|$5|Y|Z|10|C|$11|14]]|15|$5|Y|Z|10|C|$11|16]]|17|$5|Y|Z|10|C|$11|18]]|19|$5|Y|Z|10|C|$11|1A]]|1B|$5|Y|Z|10|C|$11|1C]]|1D|$5|Y|Z|10|C|$11|Q]]|1E|$5|Y|Z|10|C|$11|U]]]]

<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-1/" rel="noreferrer">QR Code Demystified - Part 1</a> 
<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-2/" rel="noreferrer">QR Code Demystified - Part 2</a> 
<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-3/" rel="noreferrer">QR Code Demystified - Part 3</a> 
<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-4/" rel="noreferrer">QR Code Demystified - Part 4</a> 
<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-5/" rel="noreferrer">QR Code Demystified - Part 5</a> 
<a href="https://www.matchadesign.com/news/blog/qr-code-demystified-part-6/" rel="noreferrer">QR Code Demystified - Part 6</a> 

and 

<a href="http://www.thonky.com/qr-code-tutorial/introduction/" rel="noreferrer">http://www.thonky.com/qr-code-tutorial/introduction/</a>

To know the Mathematics theory behind it there is a discussion in Math Stackexchange 

<a href="https://math.stackexchange.com/questions/76045/reed-solomon-polynomial-generator">https://math.stackexchange.com/questions/76045/reed-solomon-polynomial-generator</a>

blocks|key|4015204|text|http://www.swetake.com/qrcode/qr1_en.html|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4015205|我想我应该提到这一点，它解释了它们是如何工作的。|4015206|entityMap|0|LINK|mutability|MUTABLE|url^0|0|15|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]]|C|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|4]]]]

<a href="http://www.swetake.com/qrcode/qr1_en.html" rel="nofollow noreferrer">http://www.swetake.com/qrcode/qr1_en.html</a>
Just thought I'd mention this one which is explaining HOW they work.

blocks|key|4015168|text|(回答那些询问PHP二维码的人)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4015169|如果您不期望有大量的流量，或者如果您可以缓存图像，那么Google+Charts+QR+chart+type可能会为您工作。它非常容易使用-只需将要编码的文本放入URL中即可。|offset|length|4015170|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/apis/chart/types.html#qrcodes^0|0|R|R|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

(In response to those asking about QR codes in PHP)

The <a href="http://code.google.com/apis/chart/types.html#qrcodes" rel="nofollow noreferrer">Google Charts QR chart type</a> might work for you, if you don't expect a lot of traffic, or if you can cache the images. It's extremely easy to use- just put the text to encode in the URL.

blocks|key|5426129|text|这里有一个很好的二维码libqrencode编码LGPL库|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5426130|5426131|+Libqrencode是一个C库，用于对二维码符号中的数据进行编码，二维码符号是一种可以由手持终端扫描的二维符号，例如带有CCD的手机。二维码容量高达7000位或4000个字符，具有很强的健壮性。|blockquote|5426132|5426133|5426134|这是一个针对iPhone的Google+code+project+that+decodes+QR+code，但它是LGPL的，源代码是可用的。应该是适应性强的。|5426135|-Adam|5426136|entityMap|0|LINK|mutability|MUTABLE|url|http://megaui.net/fukuchi/works/qrencode/index.en.html|1|http://code.google.com/p/iphone-qrcode/^0|B|B|0|0|0|0|0|0|D|14|1|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|-4|5|6|7|11|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|12|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|13|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|14|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]]|C|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@]|C|$]]|$1|N|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|O|$P|$5|Q|R|S|C|$T|U]]|V|$5|Q|R|S|C|$T|W]]]]

Here's a good LGPL library for encoding QR code <a href="http://megaui.net/fukuchi/works/qrencode/index.en.html" rel="noreferrer">libqrencode</a>

<blockquote>
 Libqrencode is a C library for
 encoding data in a QR Code symbol, a
 kind of 2D symbology that can be
 scanned by handy terminals such as a
 mobile phone with CCD. The capacity of
 QR Code is up to 7000 digits or 4000
 characters, and is highly robust.
</blockquote>

Here's a <a href="http://code.google.com/p/iphone-qrcode/" rel="noreferrer">Google code project that decodes QR code</a> - aimed at iPhone, but is LGPL and the source is available. Should be adaptable...

-Adam

blocks|key|3168653|text|PyQrCodec是一个Python库，用于将二维码编码为PNG，并将其从各种图像格式解码。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3168654|entityMap|0|LINK|mutability|MUTABLE|url|http://pyqrcode.sourceforge.net/^0|0|9|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]]]]

<a href="http://pyqrcode.sourceforge.net/" rel="nofollow noreferrer">PyQrCodec</a> is a Python library for encoding Qr codes to a PNG and decoding them from a variety of image formats.

blocks|key|4015255|text|你可以在这里免费找到c#示例http://twit88.com/home/opensource/qrcode+(只需要注册)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4015256|entityMap|0|LINK|mutability|MUTABLE|url|http://twit88.com/home/opensource/qrcode^0|E|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]]]]

You can find c# example here <a href="http://twit88.com/home/opensource/qrcode" rel="nofollow">http://twit88.com/home/opensource/qrcode</a> for free (only need to register)

blocks|key|5426420|text|您可以直接使用zbar来解码qrcode。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5426421|#!/usr/bin/python

from+sys+import+argv
import+zbar
import+Image


#+create+a+reader
scanner+=+zbar.ImageScanner()

#+configure+the+reader
scanner.parse_config('enable')

#+obtain+image+data++++
pil+=+Image.open("base.png").convert('L')
width,+height+=+pil.size
raw+=+pil.tostring()

#+wrap+image+data
image+=+zbar.Image(width,+height,+'Y800',+raw)

#+scan+the+image+for+barcodes
scanner.scan(image)

#+extract+results
for+symbol+in+image:
++++#+do+something+useful+with+results
++++print+'decoded',+symbol.type,+'symbol',+'"%25s"'+%25+symbol.data

#+clean+up
del(image)|code-block|syntax|javascript|5426422|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use zbar directly to decode the qrcode.

<pre><code>#!/usr/bin/python

from sys import argv
import zbar
import Image


# create a reader
scanner = zbar.ImageScanner()

# configure the reader
scanner.parse_config('enable')

# obtain image data 
pil = Image.open("base.png").convert('L')
width, height = pil.size
raw = pil.tostring()

# wrap image data
image = zbar.Image(width, height, 'Y800', raw)

# scan the image for barcodes
scanner.scan(image)

# extract results
for symbol in image:
 # do something useful with results
 print 'decoded', symbol.type, 'symbol', '"%s"' % symbol.data

# clean up
del(image)
</code></pre>

blocks|key|5426376|text|你可以试试python-qrtools：https://launchpad.net/qr-tools，它使用qrencode生成，zbar解码(从摄像头或文件;-)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|5426377|entityMap|0|LINK|mutability|MUTABLE|url|https://launchpad.net/qr-tools^0|K|U|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 try python-qrtools: <a href="https://launchpad.net/qr-tools" rel="nofollow">https://launchpad.net/qr-tools</a>
It uses qrencode for generating and zbar for decoding (from webcam or a file ;-)

Looking for free/opensource code or description of algorithms to code (simple) and decode (hard) the 2D barcode <a href="http://en.wikipedia.org/wiki/QR_Code" rel="noreferrer">QR code</a>.

It doesn't seem like a trivial problem, but it's so popular in Japan that there must be something already available...

QR code (2D barcode) coding and decoding algorithms?

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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寻找免费/开源代码或算法描述，以编码(简单)和解码(硬)的二维条形码。这看起来不是一个微不足道的问题，但它在日本如此受欢迎，以至于肯定有一些已经可用的东西……

问QR码(2D条形码)编码和解码算法？
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