The Math behind QR code, what happens inside there?

[@jjsara123]

what on earth was the point of the first 2:20? I though it was going to be an interesting fact that the positioning block was a ratio of the overall dimesions. Nope!

[@ronytesler]

You forgot the message length indicator (10 bits for version 1) above the encoding indicator.

[@sinamark-com]

I didn’t understand anything you said. I only understood the matrix is 21 x 21.

[@ProfessorJulioLombaldo]

It’s a great way to start 😊

[@EricsWormPlayground]

Wow, this was awful, like listening to a high guy explain QR codes, never getting to any point.

[@Crazytesseract]

Format information, has a BCH code for error correction. The data bytes block have Reed Solomon codes for error correction. And that is the main math in the QR codes. There is other too.

[@brentcoates5470]

For example for example for example for example for example for example this is horrible

[@garydunken7934]

Haha... I was wondering about that too and looking in the comment to see if anyone noticed. Honestly, I found the explanation confusing. :(

[@ullianoliveira6135]

english is not his first language, it's ok

[@IONYVDFC]

I think I was mislead by the title of the video 😵‍💫A lot of info about QR graphics representation but nothing about the math.

[@SLowFatMilk]

the math in this video is that its a 21x21 matrix duhh

[@des2knee962]

The length, at 11:02 is wrong, you wrote 13 in binary correct ly but placed the blocks in reverse order

[@cheese-power]

What are you talking about? 😢

[@amirs9852]

Please no background music... thank you for the Video!

[@ProfessorJulioLombaldo]

Thanks for your opinion

[@LeslieSolorzanov]

This is a very nice illustration but it's not the math 😅 but still super cool. Thanks

[@donwald3436]

It's like you're reading notes in point form except you've erased all the headings. What a ramble. I feel sorry for your students.

[@YerryBalenzuela]

You ever wonder why everyone says you’re not likable?

[@donwald3436]

@@YerryBalenzuela No, I know why.

[@RP-dy5mu]

@@YerryBalenzuela Probably because he says it like he sees it, in a world of snakes who pretend to be kind.

[@RepairCompany-o3l]

At least I know now that QR Stands for quick response

[@DinnerboneWiki]

can you please better explain format correction?

[@atuldangi]

Superb sir. Very well explained.

[@ProfessorJulioLombaldo]

thanks

[@faizan27984]

Atul bhangi 👌

[@simatwokirwa4500]

Very educative ...easy to understand especially if you know basic maths including binary digits ... thanks a lot.

[@matthewoxley8289]

I HAVE NEVER ENCOUNTER ANYTHING THAT I COULDNT UNDERSTAND EVEN JUST A VERY LITTLE OF ANYTHING!!! I UNDERSTOOD 21X21. THAT IS IT. I AM EITHER MUCH NOT SMARTER (😊) THAN I FEEL THAT I AM OR THIS VHDEO IS NOT MADE TO EXPLAIN ANYTHING BUT SIMPLY JUST TO RAMBLE AND CONFUSE. THERE IS A VIDEO ABOUT DELTA P THAT IS SUPER FUNNY AND INFORMATIVE. MUCH WATCH

[@darrel604]

@ 7:37 I believe your final read is incorrect based on the keep/invert rules. (Row 1, Block 5) should be white instead of black.

[@techgalaxy100]

Wonderful!! Thanks. How would a whole URL be saved in that small amount of data squares ? Any video on that ? Thanks

[@ProfessorJulioLombaldo]

Depends of data kind in small right below place

[@artvizualvideos]

Thanks for the explantion

[@risulshakil2879]

nice vedio, so educative ❤️❤️

[@JoeBlow-zr2ru]

Rather than taking 3 minutes to describe a 3x3 box inside a 7x7 border pattern ... why not just say "we have this box pattern ... and we put it in these 3 corners ... and the reason is ...."

[@z-h-d]

Louder!

[@fabriciobleach]

Muito interessante, professor! Obrigado.

[@udaykiranthummala150]

Nice presentation

[@ProfessorJulioLombaldo]

Thanks

[@RWL719]

Sorry I didn't learn any math on how QR codes works. I'm assuming over a billion people could be assigned a code and they would all be different.... looking for that kind of math

[@SteveBossen-o3v]

What about if it was 6. And 3 squares of 6. Then the dark powers started branding all you around the world buy your codes with the illusions of gocernments, freedoms, and bondage that you could feel and surely experience but everyone just making it seem silly. Welcome to the system of the farm please enjoy your stay

[@des2knee962]

There are 14 bytes of information on your qr

[@BRY0402]

Great video, really loved the explanation although you didnt explain all of them like the masks it was still good

[@buiminhmusic2935]

Thank you sir

[@ProfessorJulioLombaldo]

You are welcome 🤗

[@NHaq-e7d]

for example.

[@justblue425]

thanks professor. :)

[@ProfessorJulioLombaldo]

You are welcome 😊

[@jardelfarias2009]

Professor tem este video em português?

[@ProfessorJulioLombaldo]

Ainda não, mas farei também

[@gabrielmoranneves]

@@ProfessorJulioLombaldo se colocar legendas já está ok

[@slowly-but-eventually]

Quack Response Code 🦆💬

[@IsabelaBarrios-n2l]

very good I like

[@NegativeAccelerate]

Nice animation

[@ProfessorJulioLombaldo]

Thanks ;)

[@Fensmiler]

Holy crap there is so many bots

[@hikatosumi7143]

So I finally know it’s 21 by 21
My question is how is that possible?

[@stanzinnorboo7083]

Where's the math?

[@SLowFatMilk]

21x21 matrix how could u not see it 🙄

[@Themadscientist6858]

I understand one thing about QR CODES now😂 you have to understand its a square within a ⬛ square😂😂😂😂😂😂😂

[@GermanFirsov]

Too much "for example", why is that example made?

[@shisuboyz]

Hello sir I have a problem what is fill in the E1,E2,E3,E4.... blocks plz help me

[@kipchickensout]

1. I came for the math, there is no math in this video
2. it seems like you only understand half of what you said yourself

[@khasanshadiyarov]

Too many "for example"

[@TommyPhoebe-d6b]

Perez Timothy Garcia Karen Martinez Linda

[@StuffBudDuz]

Ditch the music. It's hard to understand you. The music adds nothing to your video, only an additional distraction. Had to stop watching.

[@GomrRomasg]

Martinez Margaret White Ruth Hall Jennifer

[@unknown-yo2tx]

I understand nothing new

[@blugreen99]

Ok

[@ottik5]

well, sorry to say this, but this video is for nothing.... Doesn't explain use of mask in detail, doesn't say, how it is read. What will happen, if i want to store binaryx data containing only 0, there are now 4 white squares everywhere, how i can know, which of them is ending?

[@MarkAvery-l3j]

Perez Shirley Thomas Robert Walker Michelle

[@平贺真子-k9v]

Walker Brenda Thompson Susan Robinson Sarah

[@JosephLewis-i7h]

Clark Ruth Davis James Moore Mary

[@Sheridanbryants-w1b]

Lewis Margaret Moore Jeffrey Lewis Jeffrey

[@negvorsa]

😭😂🤣

[@canoaslan1011]

just say words, call it a video

[@blugreen99]

Poor explanation very bad english.

[@teamkraken1620]

I wish we can see dislikes on videos again

[@GomrRomasg]

Davis Thomas Smith Sharon Young Brian