A QR code, or Quick response code, is,
according to Denso (the inventor of the QR code), is a machine
readable 2 dimensional code. One way to look at a QR code is a more
advanced version of the standard bar code. While a bar code can be
read in a linear fashion to identify an item that the bar code is
tied to it can only be read across; thus, being a 1-Dimension code.
Adding another Dimension with the QR code gives several benefits
above the bar code. One major benefit is ability for QR codes to be
able to have data correction. For instance, let us say that the QR
code has stains or is damaged in some way, one would still be able to
read the code if below 30 percent of it is damaged. A list of other
benefits includes higher capacity of data holding, ability to hold a
greater variety of data such as different languages, being able to
have the same amount of data in a bar code but in a smaller form, and
being able to be scanned from any angle as well as on distorted
surfaces.
A QR code is used in several ways to
make track or categorize different item. But one important way to use
a QR code is one that can link you to websites. SANS Securing the
Human advises being careful when using QR codes as they may link to a
malicious site and may give mal-ware to the device you are using. So,
as with anything linking to the internet be sure that the link or QR
code is legitimate and safe.
Hi Johnathan! I like your blog, especially the minimalist feel to it. It's readable and not cluttered. The post was a good overview of QR codes and their functions. It would definitely be a good place to start for someone who wanted basic information about QR codes and their data correction, information-holding capacity, and versatility. You also make a good point about the risks of scanning an unknown QR code.
ReplyDeleteBefore posting to your blog, you should walk away for a bit, then give it a careful once-over before submitting. There are a few sentences that don't make sense ("thus, being a 1-Dimension code" isn't a full sentence, for example) and every now and then you missed a word ("One major benefit is ability[...]"). Proofreading is your friend!
(Also, make sure you fill out your profile before blogs are graded)