yet... where all of these tutorials just show where the errors are; oh my god is that the hard part. i don't understand any of the descriptions on finding the error locations.
Hi! You are really good at this, and you moved me closer to some answers. But maybe because of my non well english i missed some important information. Whats the logic that you use to split qr to sectors? Because in my way i tried to decode QR by using your methodic (it was version 1 21x21 blocks). And i clearly know, that it starts from $ symbol (dec 36, 00100100 binary) but i cant get this combination even if i start from the bottom, what do i do wrong? I started to understand QR logic because i spotted some interesting QR from one company. He seems like regular one but have some hidden information inside. I used all scanners online and apps to decrypt it, but nothing works. For example when I am scanning it, it shows WT:1:40:102 and based on version 3 (29x blocks), but when Im generating my one, exact the same message converts to version 1 (21x blocks). And when they scan my generated QR it on their software it shows that nothing store inside, but if they scan their own with exact same text but based on version 3, showing hidden content inside.
@@saschavjater9065 not yet, i had some specific task to generate QR like this for the first time in my life. And i just hoped that somehow QR’s like this can be decrypted in easy way. Thanks for answer anyway:)
Like many things, the QR code started out simple, and got more complex over time as it was refined. The story of the Japanese guy who invented it is pretty cool.
they are slightly more annoying, but certainly possible. For size 2 and up you have to skip over the alignment pattern, which makes your groups skewed and slightly more difficult to read. While for size 3 and up every group of 8 bits are alternating between the first half and the second half of the string. the wikipedia article on qr codes has a nice image of the pattern for version 3 and up. the idea is basically that the first four bits are the encoding type as usual, then the next four bits are the first half of the length, then you skip 8 bits and continue with the next four bits after that being the second half of the length and so you keep going, with each byte being four bits, skip eight, and then the other four bits, until you get to the end at which point you look at all the bits you skipped
No. I don't think there is any readable information. They are there to help the QR code scanner locate and align the code, ensuring that it can be read correctly even if it is slightly distorted or rotated.
I know that, but if it where for them to be read, could they be read? they must be, only i do not know how! I wonder if there is any corelation to number 6. In the previous barcode, the three 6 were always present. It must be the same whith this one. For correct alignment one square only would have been enough.
Just want to say this first. I learned this topic specifically for this video. I am not an expert and this was made a while ago so I cannot answer you professionally. However, here I tried my best to give some assumptions. While a single alignment square might be enough, three squares provide more reliable alignment, especially qr code has more dimensions than a barcode. This also explain why larger qr code needs more small alignment square in the middle. Also, having three squares allows room for error correction even if one of the square is damaged. I don't think they directly contain readable information, but their spacing could theoretically be used for data encoding.
Your XOR analogy is brilliant 😂
Indeed.
You might laught, but I thought exactly «hmm what if such a weird video would exist, this is exactly what I would need», and here I am
i will definitely try. i can't believe it's this simple, given that you are familiar with a Lagrange Polynomial.
yet... where all of these tutorials just show where the errors are; oh my god is that the hard part. i don't understand any of the descriptions on finding the error locations.
Never getting RickRoll’d again
I guess such weird skill might be needed if one is assigned to work as an agent someday on some missions…
4:59 on the left QR 9 line is but on the right it jumps up (now XOR switches from 9 on 8 line) - why? is it mistake?
Thank you very much. Now I'll put it to the test.
Great information about the QR code
Is there a video using version 3?
How do you get the pattern 1 mask with the level M?
Thanks bro...🎉... Finally i know it.. 🤧
Hi! You are really good at this, and you moved me closer to some answers. But maybe because of my non well english i missed some important information. Whats the logic that you use to split qr to sectors?
Because in my way i tried to decode QR by using your methodic (it was version 1 21x21 blocks). And i clearly know, that it starts from $ symbol (dec 36, 00100100 binary) but i cant get this combination even if i start from the bottom, what do i do wrong?
I started to understand QR logic because i spotted some interesting QR from one company. He seems like regular one but have some hidden information inside. I used all scanners online and apps to decrypt it, but nothing works. For example when I am scanning it, it shows WT:1:40:102 and based on version 3 (29x blocks), but when Im generating my one, exact the same message converts to version 1 (21x blocks). And when they scan my generated QR it on their software it shows that nothing store inside, but if they scan their own with exact same text but based on version 3, showing hidden content inside.
Ever heard of SQRC's?
@@saschavjater9065 not yet, i had some specific task to generate QR like this for the first time in my life. And i just hoped that somehow QR’s like this can be decrypted in easy way. Thanks for answer anyway:)
4:56 why does it use pattern 1 and why not 3,4,5??
Really helpful video
I have a qr code which is very messed up can you recreate it and make it readable
brooooooooooo best solution for Xnor gate hahahahahahahaha........
Weird question, but how do I recreate the error detection
Can't imagine the mind who created QR codes
Like many things, the QR code started out simple, and got more complex over time as it was refined.
The story of the Japanese guy who invented it is pretty cool.
I thought that I would find this video but it is cool
Thanks!
Is there any way to decode bigger QR Codes? :)
they are slightly more annoying, but certainly possible. For size 2 and up you have to skip over the alignment pattern, which makes your groups skewed and slightly more difficult to read.
While for size 3 and up every group of 8 bits are alternating between the first half and the second half of the string. the wikipedia article on qr codes has a nice image of the pattern for version 3 and up.
the idea is basically that the first four bits are the encoding type as usual, then the next four bits are the first half of the length, then you skip 8 bits and continue with the next four bits after that being the second half of the length and so you keep going, with each byte being four bits, skip eight, and then the other four bits, until you get to the end at which point you look at all the bits you skipped
@@asdfghyter very cool! thanks for sharing
Sir I have a problem what I fill in E1,E2,E3,E4 etc plz help me
Thanks for the video, interesting! One qouestion: Is there a code that can be read in the 3 alignment squares? Or can they be read?
No. I don't think there is any readable information. They are there to help the QR code scanner locate and align the code, ensuring that it can be read correctly even if it is slightly distorted or rotated.
I know that, but if it where for them to be read, could they be read? they must be, only i do not know how! I wonder if there is any corelation to number 6. In the previous barcode, the three 6 were always present. It must be the same whith this one. For correct alignment one square only would have been enough.
Just want to say this first. I learned this topic specifically for this video. I am not an expert and this was made a while ago so I cannot answer you professionally. However, here I tried my best to give some assumptions.
While a single alignment square might be enough, three squares provide more reliable alignment, especially qr code has more dimensions than a barcode. This also explain why larger qr code needs more small alignment square in the middle. Also, having three squares allows room for error correction even if one of the square is damaged. I don't think they directly contain readable information, but their spacing could theoretically be used for data encoding.
Thanks :)
Thank You Sir
Once the readers can see more than 2 colours (black & white) we would be able to fit loads more data into a QR Code.
فضلا هل ممكن ان تعطيني ملف الاكسل سأكون شاكر لك جدا
hello!! i just got you on geoguessr
Oh didn't expect people will find me from Geoguessr. Sorry I forgot which is you but very welcome to the channel.
Great❤
Hi are you going to do any giveaways
Sexy 😄
By the way did you plot the qr in excel pixel by pixel or made use of some automation?
Thanks. I just plotted them pixel by pixel and some copy & paste because I am dumb. I think there should be better methods to do it.
@@NoOneAsked_YT no bro you are vary good teacher, Honestly.
I subcribed. Such a useless but interesting skill.
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I cant understand the narrator . To strong of an accent!
His English is very good.