History of QR Codes
The QR Code is a form of two dimensional symbol created by DENSO WAVE (established under the name of DENSO) in 1994, with the primary objective becoming a "code read easily by the scanner equipment". The QR Code is a information matrix that carries meaningful in the vertical direction as nicely as the horizontal, hence the two-dimensional term. By carrying in each directions, QR Codes can carry up to several hundred times the amount of information carried by ordinary bar codes.
Bar Code to 2D Code
Bar codes have become widely popular simply because of their reading speed, accuracy, and superior functionality characteristics. As bar codes became popular and their convenience universally recognized, the market began to call for codes capable of storing much more , much more character kinds, and that could be printed in a smaller space. As a result, numerous efforts had been made to improve the amount of stored by bar codes, such as increasing the quantity of bar code digits or layout multiple bar codes. However, these improvements also caused problems such as enlarging the bar code region, complicating reading operations, and increasing printing cost. 2D Code emerged in response to these requirements and problems.
QR Code Functions
QR Code offers the following functions compared with conventional bar codes.
- High Capacity Encoding of Data
- While conventional bar codes are capable of storing a maximum of roughly 20 digits, QR Code is capable of handling several dozen to several hundred times much more . Up to 7,089 characters can be encoded in 1 symbol.
- Footprint Size Smaller than Conventional Bar Code
- Because QR Code carries each horizontally and vertically, QR Code is capable of encoding the same amount of information in roughly 1-tenth the space of a conventional bar code.
- Dirt and Damage Resistant
- QR Code has error correction capability. Data can be restored even if the symbol is partially dirty or damaged. A maximum 30% of codewords* can be restored**.
- Can be Read From Any Direction in 360°
- QR Code is capable of 360 degree high speed reading. Code accomplishes this job through position detection patterns located at the three corners of the symbol. These position detection patterns guarantee stable high-speed reading, circumventing the negative effects of background interference.
Structured Append Feature
QR Code can be divided into multiple information locations. Conversely, stored in multiple QR Code symbols can be reconstructed as single information symbols. 1 information symbol can be divided into up to 16 symbols, permitting printing in a narrow region.
Open Code Standards
For 2D Code to become widely utilized, it is initial necessary for QR Code specification to be clearly defined and made public. In addition, QR Code must be freely usable by users. The background behind the recognition of bar-codes is specification disclosure. Today, there are extremely few bar codes with closed specifications or strict patent protection. QR Code is open in the sense that the specification of QR Code is disclosed and that the patent right owned by Denso Wave is not exercised.
Error Correction
QR Code has built in error correction capability to restore information if the code is dirty or damaged. 4 error correction levels are accessible for users to select from according to the operating environment. Raising this level improves error correction capability but also increases the amount of information and also QR Code size. The QR Code error correction feature is implemented by adding a Reed-Solomon Code* to the original information.
The error correction capability depends on the amount of information to be corrected. For example, if there are 100 codewords of QR Code to be encoded, 50 of which need to be corrected, 100 codewords of Reed-Solomon Code are required, as Reed-Solomon Code demands twice the amount of codewords to be corrected.
(*) Reed-Solomon Code is a mathematical error correction method utilized for music CDs and so on. The technologies was originally created as a measure against communication noise for artificial satellites and planetary probes. It is capable of generating a correction at the byte level, and is suitable for concentrated burst errors.
Mobile Barcodes in Japan
It all began in 2002 with the Japanese network carriers, handset makers, and a quantity of service businesses, collaborating to produce innovative utilizes for the new cameras in mobile phones. Their favorite concept was an concept to turn a camera telephone into a barcode scanner, delivering encoded -such as URLs that could connect direct to the mobile internet.
QR Codes -The style of barcode that was adopted is known as QR (short for Fast Response) and 5 short years later, QR Codes are recognized by over 90% of Japanese mobile users -and utilized by over 50% of them -for fast and simple access on the move to encoded on the internet. Much more individuals in Japan now surf the web from a mobile telephone than from a PC and QR Codes are discovered everywhere -in advertising and promotional materials, on item packaging and vending machines -to deliver "Fast Response".
The Japan Story -3Gvision's barcode reader, now known as i-nigma was created to be pre-installed in handsets supplied by all of Japan's main mobile manufacturers -in collaboration with them -to the specification of the Japanese network operators. As a result, this barcode reader has become the standard for camera phones in Japan -in over 80 million handsets, with over 90% market share -creating a marketplace phenomenon that the rest of the world is now embracing
In Japan, all cellphones are able to scan QR Codes. McDonalds utilizes them to display nutrition for it is food products. It is a quick and simple way of getting the nutrition info for the burger on your telephone and saves thousands of dollars annually on printing expenses.
QR Codes and How to Use Them
How it works
QR Codes, or Fast Response codes, are a type of 2D bar code that may be decoded using your Smartphone with a QR Code reader application. From its lowly beginning as a tracking mechanism for auto parts, QR Codes have a confirmed to be extremely helpful in advertising and convenience related applications.
There are two primary issues that you have to have when you deal with QR Codes:
1. A mobile telephone with a camera and Web connectivity
2. A QR Code reader. Most new intelligent phones have a QR Code reader already installed, if not you will need to go to your telephone providers “App Store” and download a reader. Many Android, Nokia, and Blackberry phones come with QR Code readers pre-installed. If you have an older telephone, you will need to download the reader application and install it yourself.
How Do You Scan the QR Code?
Following you have installed the application, start up the reader and snap a picture of the QR Code. Make sure that your hand is steady and that you are able to consist of the entire code into the picture. There will be some instances when a scan fails, do not worry, just maintain snapping! Some of the newest QR Code readers (like i-Nigma for the iPhone) no longer require you to take a picture they simply permit you to scan the barcode with your camera!
Depending on your software, it may take from 5 to thirty seconds for the application to resolve the link for you. That is to say, to decode the written behind the code. For instance, if it is a URL, the QR Code reader will open your web browser and let you view the mobile site the code links to. If it is a vCard, a file that contains a person's get in touch with , it will offer to let you save the into your address book.
How do individuals know what to do when they see a 2d barcode?
2D barcodes are quickly becoming a widely recognized symbol that signifies mobile content to the public. If you want to be sure that individuals know what to do with your code then tell them what to do with a easy notation under or subsequent to the code that says something like “Scan me now for much more information”
Generating QR Codes
Of course if you want to use QR Codes you need to be able to generate them! There are numerous code generators on the internet that you can use for free to produce your own QR Codes. Some will even let you track your codes for free! (for personal use only of course)
Currently the very best on-line QR Code Generators permit you to produce QR Codes for a wide array of information sets and actions such as issues like:
- Browse to a web site.
- Bookmark a web site.
- Make a telephone call.
- Send a short message.
- Send an e-mail.
- Produce a vCard with coordinates to add a get in touch with to your device.
- Produce a meCard to add a get in touch with to your device.
- Produce a vCalendar event to add to your calendar.
- Produce a link to Google Maps URLs.
- Produce a link to Bing Maps URLs. . Produce a link to raw geological coordinates.
- Produce market:// URLs for looking for publishers or packages on Market app for Android.
- Produce special YouTube:// URLs for YouTube app on iPhone.
- Fetch and encode the newest tweet of a Twitter user.
- Overlay a Twitter users profile image over the code. . Produce a mobile URL to tweet on Twitter.
- Initiate a chat to a specific Blackberry PIN on Blackberry Messenger.
- Connect to a WIFI network on Android devices.
- Read plain or free formatted text on your device.
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Can a printed be held liable if the QR which is printed cannot not be read?
I would assume (please understand that I am not giving you legal advice) that if the printer created the QR Code it could but my guess is that the limit of their liability would be the cost of the printing. We recommend that you always test the QR Code (if you create it) before giving it to the printer and whenever possible test the item created by the printer before you release it.
QR Codes are normally readable even if they are exposed to the elements.