How QR Codes Are Built

[@christopherwillson4269]

Most of the "How QR codes work" videos are not actually how they work, but how they are used. You rang true. Excellent video!

[@ezinafauda4394]

Same. I was getting annoyed. I wanted to this THIS type of video but had to go through ten videos to get to this one.

[@andylindsaytunes]

There are countless videos claiming to do it, but this is the only vid that claims to explain how QR codes work, that actually does explain how they work.

[@mateodillon9412]

yessss

[@maximoaugustus1768]

You probably dont care but does anyone know a way to log back into an Instagram account..? I stupidly forgot my login password. I appreciate any assistance you can give me.

[@Nhatanh0475]

@@maximoaugustus1768 Ask Instagram assistant. And youtube ain't a place for that.

[@RageBearer]

Took me way to many videos to find this...hopfully we can get this to front page so someone else can find what they are looking for

[@chaosa928]

@@maximoaugustus1768 this is bait

[@ellipsiswellbeing1691]

I made the effort to sign in to google, just to give this video the recognition it deserves. As others have noted, very few other videos explain exactly how QR codes work - thank you for such a clear video!

[@jupeter8086]

I was literally searching whole of KZbin for this.....

[@MrMcChicken10]

@Jaime Bodie OH MY GOODNESS STOP

[@sudeepjainsudeep]

Absolutely, others are busy explaining how QR code has invented and its applications. Thanks for this video..

[@gooze3888]

@@MrMcChicken10 dont use God's name in vain please :(

[@MrMcChicken10]

@@gooze3888 sorry :(

[@sudheerkumarchivukula8328]

Damn .. Same here

[@nosknut]

Awesome work! Thank you for not just making a "long list of no information" like everyone else who seems like their videos are English essays!

[@PaulVaucher-CH]

Exactly what I was looking for! A clear, synthetic summary of how QR codes work!

[@veganconservative1109]

Finally! I may not still understand it, but I gathered a lot more of the gist than the other 'instructional' "how do qr codes work" YT vids I watched.

[@mushchlowastaken]

excellent video mate. straight to the point, spoken clearly, and exactly what was advertised. subscribing and hoping for more videos in this style :)

[@beskamir5977]

That was really cool! Glad I found your channel through Matt Parker's math puzzles.

[@pavany4506]

This really explains how it is built and each cell's importance.

[@llspragulus]

This was the best explanation of a QR code. Thanks for this!

[@brick_layer541]

THANK YOU JAMES. Every other video I clicked was bogus clickbait. This was perfect.

[@harshvardhan01]

This is the stuff I was looking for almost half an hour.

[@Nhatanh0475]

When you invert it, my phone literally pick it up right away. These tech are amazing!

[@AgentM124]

You deserve so more subs man.

[@Gustavo.Andreotti]

wow very good explanation. Finally someone REALLY showed how this works

[@huanchanic6776]

if anyone was curius the qr code on the title just says to look up "james explains"

[@antoniogabrielchaconmenke83]

Oh wow, that was a really good explanation, and in just ~6 minutes! Great video

[@Pax.YouTube]

Beautifully explained.

[@thathuman4237]

Could you do a full guide in error correction data it is also really hard to find anything on how to do it?

[@MuhammadKhan-yl7mt]

Omg who invented this, must be mathematical genius

[@ainurkurniawan4445]

1994 by Masahiro Hara

[@Pimp-Master]

Hardly, computer data packets use identical nomenclature... for what, 60 years now? Message start message end message check...

[@reggiep75]

Nah, just Japanese and the Japanese are the OTG's - Original Tech Gangstahs. 😂

[@jaikowalik966]

Exactly the video I was looking to explain it! Thanks a lot - very helpful!

[@DeenSheriffdeen]

Excellent Video. Clearly explained.

[@AgentM124]

So I would love to see an explanation for the reed Solomon. Maybe other version of QR, or other barcodes.

[@JamesExplains]

Yeah, I'm hoping to make one for Reed Solomon, but I've gotta try to wrap my head around it first and work out a good way to explain it!

[@AgentM124]

@@JamesExplains sounds good! Take your time, it's a lot of complicated formulas.

[@ultimatelegoman1279]

@@JamesExplains please post all your sources down below.

[@SKF358]

How is it read? By a laser light that zig zags from bottom right and up and down?

[@SpokenWordPoet]

Perfect content! - Thank you so much! (The channel logo makes me wonder, if the gears will ever be able to rotate.)

[@NMA_NoMoreAmmo]

Yes, they will. As soon as one will fail.

[@Anonymous-u8r8j]

I am a 13 year old who has to program a gui program in C that can create an QR code of 3 different standards. This was so helpful because I was stressing about this project so much.

[@meowrel]

Bruh

[@StuffBudDuz]

@1:04 "at a size of 1 pixel." I don't think that's correct. A square can be made of many pixels, and in some cases the QR code may not even be screen-based. They exist on paper, as well.

[@Blank-n7c]

6:06 Rick roll QR code? No, it’s you James Explains

[@reggiep75]

Finally, some clarity on the original 21x21 QR code and how data is stored without having to go thru the dark archives (THE DARKIVES? 😂) of the internet. I have found the DENSO white paper which is a nice read at 12 pages that expands on codes that were developed. Will have lurk around your vids and if there's stuff that entertains my mind, I'll sub. 👍

[@ascourter]

This was great, thank you for explaining how they are built!

[@joaogusatti4925]

very intresting video, nice pfp btw a question: what is the meaning of "%" in 1:47 ?

[@joaogusatti4925]

ok nvm I just discovered by myself, thanks for everyone support!! it means the same as mod or rest of the divison (note that counting starts at zero, not at one)

[@mickhernandez2665]

i cant believe after 7 years since QR code exist, 7 billion users, theres still no 2 of the same QR code patterns

[@ConcreteJungle95]

Fantastic video, thank you so much my curiosity is now satisfied

[@olivieryamadeoeiderusli3224]

Thank you for the clear and short explanation :D

[@oceanman7868]

Somebody who gives me a propper explanation and not just the history or why qr code is usefull. Thanks!

[@krystalfox007]

OMG The Rick Roll... I dont know what I expected.

[@bigsykedaddy999]

That was great! 😂

[@akshat0306]

I am lucky enough to find this video first try! (Definitely did not waste 46 minutes to find it)

[@SterlingSansing]

This code says James Explains... I had to see what you created 🤪

[@jakubrejzekjunior7349]

I was trying to search this for like a week or two

[@bryanredd4654]

Truly excellent video!

[@karl-ve2of]

Greatly explained! Thanks for video

[@FrightfulMC]

Im making a qr code generator and was wondering if the correction bit changes based on the input value

[@iolair1973]

Exactly the info I was looking for; thank you!

[@navtejkalkat7482]

I I love this I love this show because it shows is all about QR codes that’s it

[@bsmithril]

Reed-Solomon error correction. Thanks for specifying that!

[@ashwin_raikar]

Thanks for this simplified explanation

[@SamHawleywood]

Hi! This video was so informative - thank you! Can you have QR Codes that look different but take you to the same location?

[@subiektywnykomentarzd7676]

Top of the top, great work!

[@tpp1677]

Thumpnail: James Explains 6:02: James Explains

[@ssunlimited9]

I was looking for how QR code’s work

[@jonsaircond8520]

Great explanation

[@Alphag11]

Hi sorry for the question I was left the homework where I have 18 lines and I have to put them into a QR code. It’s like they gave me the 18 lines with numbers and spaces, which I have to fill into a QR

[@jebronekitty]

Finally a video that understand what I'm trying to search. I got all these awful videos on, "go to stupid, pay to create, QR code"

[@loremipsum6113]

You deserve more subs, that's a cool explanation

[@Cheese145b]

Exellent i learned a bit of qr code but idont know how the error correction works

[@SweDownhill]

Incredibly well explained! Thanks for sharing. 😍😃😎

[@shulkerdragon8653]

A very good explanation!

[@lumichromek]

I love how thumbnail says Jaymes explains

[@hyrokon5767]

Me right now : 03:00 am, trying to sleep My brain : how tf the qr code work? It just a black and white spot

[@cgMediaWorks]

Very well done! Thank you! My question is: how does the information stored in the code remain editable? Is that information (link, contact info, etc.) actually stored on and referenced through a server? Or does the pattern just by itself generate the information through the camera reader software? If so, how then does the information remain editable? For example, even with free QR generators, I can simply load up the image to change the linked info, but the image pattern does not change. So the QR on all my printed business cards still works but displays updated info. Ok, thank you again. Appreciated your thoughtful visual approach.

[@JamesExplains]

There's multiple ways it can be done. The QR code is just the data displayed in a visual way, so the raw data of the card (name and contact details and such) could be stored but then changes to them would change the QR code itself. It would most likely be the case that the system you use for your business card stores the contact details on their server, and the QR code contains the link to wherever the data is stored. That way the link to the data is always the same even when the data itself changes.

[@AndrewBrowner]

@@JamesExplains how many variations are there on modern QR cards? is it approaching infinite? ive noticed this local government service generates a QR code for each person and contains their name among other information but every time you refresh, reprint, or log in to get the page the QR code is visibly different this would mean there could be thousands of these QR codes for each person if everyone refreshed the page that many times further more none of this information is linked to servers as the scanners/codes work without an internet connection how hard would it be to edit such QR codes, are there any software programs available to do such?

[@GnobarEl]

Great video! Best explanation I found!

[@MA-naconitor]

The theee masking bits doesn’t allign with the QR masking standard (example: 000 should be (i+j)%2=0, not (i*j)%2+(i*j)%3=0 (which incidently is 101)

[@ong1]

Easy and full explanation

[@bcgibson22]

Fascinating!!

[@Billy_Dali]

thank you, this is helpful for understanding how it works. I am planning to get a QR code tattoo.

[@zuizi5200]

Ohh!! Thats cool :D

[@cedrictheveneau9141]

Really useful ! Thank you !!

[@anonymusanonymus2638]

It works! Thank you for your help!

[@charak100able]

well explained, James 😀

[@CarstenBauer]

Very amazing, thank you. I now understand QR codes a bit more.

[@ronytesler]

Shouldn't High be able to restore more than Quartile?

[@janicenelson4235]

What are the different parts of the qr code??

[@thorwaldjohanson2526]

Excellent video!

[@blackphantom374]

Thanks for the knowledge

[@lappa_]

Numeric Alphanumeric Kanji and Bytes and ... what are the others? the more comlicatet ones? (i'm from germany and i'm bad at english)

[@sandermez3856]

how to get the timing between the big squares??!!!

[@runedemeyere3992]

2:12 does he mean the timing-structures with the 5 bits??

[@runedemeyere3992]

can anyone explain this?

[@electricityandfire]

can I generate a qr code without error corection, if not can I find a simple way to gererate reed solomon error codes?

[@DeenQuery]

What a great video! thanks a lot for the explanation :-)

[@hobby_coding]

that was very helpful

[@HinaFirdaus]

Simple and amazing 😮

[@BigBlockOverland]

It’s like super sudoku lmao. Joking. I’m going to watch a few more times so I can understand this.

[@brianseo477]

Thanks for the video. Bless you!

[@vladislavkaras491]

Thanks for the video!

[@bloodsucker5643]

You deserve more views

[@jetfurious]

i scanned the 117x1177 p qr code and it said the whole lyrics of never gonna give you up

[@phuonglu1332]

Extremely helpful! Also I wonder what will happen if you scan it..

[@bigsykedaddy999]

You get "Rick Rolled" 😆

[@abulhashem7941]

What is 'mirrored in both sections of the formatting pattern?

[@AndrewBrowner]

is there any available software to upload QR codes to and edit them to contain different information in certain sections?

[@varunagarwal8395]

Great explanation subbed!

[@jerrybanks9216]

Excellent video much thanks 😊

[@powervirus3260]

The cool thig that if you scan the QR code of the thumbnail it will give you the link to this video 🙌

[@Usedsuperagent]

Is it weird that I think how qr codes work is actually really sick

[@melyssahand7851]

one and only easy and working method

[@RunningRunner46]

Only one thing I need to learn is the reed solomon error correction. Make a video for it please

[@JamesExplains]

It's in progress!

[@maxim25o2]

Did You try with DATAMATRIX? Is another type of QR code?

[@ranggakd]

I don't understand the timing part, can you explain it to me why it matters?

[@mrbit7038]

Does anyone know, how many bytes you can store on QR code?

[@imyasharya]

Hey James, recently the quick select tool of photoshop is getting me into thinking it really works. Is it all AI (which I also don't understand much about) or it is just an algorithm? I will be happy if you can throw some light on it.

[@tjnguyen746]

Thanks! 🙂🙂🙂