What is a QR Code and How it Works.
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Table of Contents
What is QR code
QR stands for Quick Response code, is a type of 2D bar
code, first invented in Japan in 1994. The design was modeled on
the coloured pieces from '
target="_blank"
>Go or Weiqi>' a board game. Traditional barcode were already in existence but the amount of
data they could store was limited, given they were scanned horizontally only.
Manufacturing plants specifically car factories needed a technology that
could carry much more information and be read significantly quicker than
existing methods.
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History of QR code
Automotive Components company
Denso Wave
devised the first QR code, short for quick response as it was able to
scan various car components at high speeds enabling them to be sorted
stored or combined much more efficiently.
Adoption of QR code
By the early 2000s use of the codes had become widespread across most of
japan especially in logistics for processes like shipping and handling
but also in everyday life like at airports and on street posters.
The
novelty of the new shape and the rise of phones with built-in cameras
was a match made in heaven and so the technophiles of japan consumed QR
codes in their millions.
Design of QR code
By this point the established design for codes was a trio of black
squares one each in the upper left upper right and lower left corners
which enabled scanning devices to detect their presence immediately.
Their design was soon approved by the International
Organization for Standardization (
>ISO >) and so following the turn of the millennium we began to see them more
in the western
world too.
How QR code works
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Every QR code consists of a number of black squares and dots which
represent certain pieces of information. When your Smartphone scans
this code, it translate that information into something that can be
easily understand by humans.
Quite simply, a QR code is an encoded piece of data. The data in a QR
code can be alphanumeric, numeric or binary.
Use of QR code
In most everyday cases QR codes are simply a replacement for a web
address saving the user from typing out a lengthy URL and allowing them
to simply scan a small barcode with their smartphone. In the last few
years android and apple phones have integrated QR code readers into
their camera apps notifying the user when a code is scanned and detected
then bringing them to the desired web page.
Pros & Cons of QR code
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Pros
QR codes also come with error correction built into their design meaning
they can often still find you the correct redirection even when the code
is damaged or dirty. Buses business cards and magazines are just a few
of the places you can find QR codes today as their use becomes
increasingly common in advertising. Countries like Russia and Ghana have
even featured QR codes on their currency normally to commemorate
historical events linking to a website with further details.
Cons
The codes have won several awards for design and innovation down the
years but admittedly the technology isn't perfect QR codes have become
tools for hackers as they can replicate a well-known website and trick
targets into disclosing their personal information. Their reliance on a
strong internet connection has also been criticized particularly for
tourists and those in rural locations.
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>How 3D Holograms Work >
>How Fingerprint Scanners Work >
Quite informative
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