More QRCode fun
This post's a bit terse 'cause the last verbose one was a bit annihilated.
I love these QRCodes, they're like modern machine-readable heiroglyphics, I think they're pretty neat indeed. Here's a few downloadable or web apps for creating your own QRCodes if you haven't got a capable phone,
but be aware they're all Japanese only. I'm going to put together an English version, but in the meantime, this is all you get.
[update] I made the English version I promised.
Psytec has a great app that updates the QRCode as you type, so you can see what effect your verbosity has in realtime, which is quite interesting to watch. You can download it here (top central link).
Vodafone has a couple of apps, a pro and an standard version (both on this page, near the bottom. The bottom one is Pro) but the Pro one seems to only offer a number of tweakboxes that basically break things, so I recommend the Standard one.
There's a great web app for making i-mode codes here that uses the free PHP script created by swetake.com. You can download both a perl and PHP version of this script, as well as English documentation, from this page.
I've put together a chart showing the maximum character capacity of QRCodes version 1-10, which was ripped off from a Japanese DoCoMo page. I also found this page on the Denso Wave English site which details versions 1-40. The versions effectively relate the size of a QRCode, each 'version' is larger by four 'modules' (pixels) per side, and therefore is capable of holding more data. Naturally increasing the redundancy or the number of characters used requires a bigger code, so as it's needed the QRCode goes up in 'versions'.
According to the official spec my V-601SH phone is rated to only read up to version 10 QRCodes but I've successfully used it to read up to version 16, which is an 81x81 pixel matrix capable of containing over 1400 numbers, or more than 850 alphanumeric characters. Neat! There's a detailed breakdown of versions 1-40 (40 is the max @ 177x177 pixels) on Denso Wave's site here.
QRCodes have another nice feature: effective compression. For numbers 10 bits are used to store 3 digits, and for alphanumeric 11 bits hold 2 characters. Using standard ASCII would require 8 bits for each character. The QR Code spec is an ISO standard now, but it costs USD $155 to get the 114 page document. Happily swetake.com has detailed a lot of the frightening math you'd find in this ISO document, saving everyone some money.
For more English details, see Denso Wave's English data pages.
23:59 | NFG | Tech
Comments
I want to create QR Code from my own Programming anyone can tell , the concept for generation QR Codes
Renu
Hello,I find your pages by Google.I have read your article and download your program. I want to write a program like yours QREdit by delphi or VB. Can you sent me some resources about this? Specially, do you have some OCX or VCL component? I will appreciate your any help.
Jan 19 05 - 22:06 - Comment from LawrenceI didn't write this software. Try swetake.com for free programming tools.
Mar 11 05 - 22:27 - Comment from _TsL of bit8beat (URL)Dear John!
thanx for QR spreading. i have a lot of fun intriguing people here in Kiev, Ukraine. thanx for Opera Panel also.
can i use that panel on my website? it would be good for your traffic driving (and my too ;).
hi. i've been looking for a code for decoding qrcode. i have actually created an encoding and decoding software for qrcode. there are several things lacking in the decoding however. in particular, there is no finder/alignment pattern detection. the decoding program simply assumes that the qrcode image is already ready for decoding. swetake doesn't seem to have any code for decoding. any help on this one? thanks in advance.
Jul 18 05 - 05:51 - Comment from Nakata Kennichi ()Konnichiwa, I am working on a project which involves application of QR code for security purpose. This project involves encoding and decoding QR code. As I am student I am not been able to get ISO 18004 standards of QR code. Will anyone provide me resources or information required for making this software? Thank you in advance
Sep 13 05 - 03:45 - Comment from green thistle ()hi all, i having the same problem which Nakata Kennichi facing, currently im doing a "PC" version of QR code reader. my project will read the QRcode via PC's Webcam and encode it, im using java (JMF and JAI) for image processing, but i dont have any information about how to read QRcode structure. can anyone send me a version of QR code format? thank u very.much. ....
Sep 13 05 - 17:40 - Comment from mormegil ()there's already a code in java for qrcode decoding.
check out http://sourceforge.jp/projects/qrcode/ by yanbe
hi all,
I am looking for an application decoding QrCode for a mobilephone on Linux OS. Does it exist? thanks in advance
Sorry, but my email address was no correct in my previous comment.
Sep 20 05 - 22:15 - Comment from Teraflop ()Hi from France where QR code are only used in profesionnal apps not yet for fun, add, and consumer oriented stuff. And the reader are dedicated scanner, not phones.
I'm wondering how scanning is done, is it through a Java app that manipulate the camera, or is there additionnal guear on your brand new phone ?
One more question, you say there is an ocr included, is it working the same way as the QR reader ?
thanks for staying us tune !
Japanese phones have the QRCode reading feature built-in. It's only useful on phones with macro mode, or auto-focusing lenses, as fixed-focus cameras cna't see close-up images like a QRCode.
The OCR feature in the Sharp phone works in a similar fashion. When the camera is active pressing a button (6 I think) will activate OCR mode, and 4 activates QRCode. Simply highlight a line of text between the blue bars, press 'go' and the text is converted. It only works on English text, since the goal is to allow Japanese users to convert English to Japanese.
I found a java application that decodes and encodes QR codes
http://www.intelcomcorp.com/2d/english/d..
Nice site, thanks.
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I've found a good QRcode reader for mobile phones from kaywa.com. It's Kaywareader.
Sep 07 06 - 17:48 - Comment from Missle ()Nice app. I have a quest. How did u get it so that when u make a contact QR code for Docomo. It writes in a little link on the top for saving to the address book in the phone. Is there a tag I can use for this process for manually inputting it into my QR code from the Raw text?
