Seonglae ChoQuick Response code
The Quick Response code was invented by a subsidiary of Toyota to track parts across the manufacturing process
Perhaps the coolest thing about QR codes is that Denso Wave, the company that invented them, never exercised their patent and released the technology for free!
- Finder Pattern (3 patterns): Located at the corners to help scanners identify and align the code
- Timing Pattern: Used to determine the grid structure
- Alignment Pattern: Repeatedly placed near the center in larger versions (version 2+)
The QR code has Finder Patterns (large squares) in three corners, horizontal and vertical timing patterns, and version/format information patterns. The Error Correction Code in the middle allows parts to be covered. As long as the Finder Patterns remain intact (corners not obscured), scanners can determine the QR code's position and rotation, while the rest (mostly data area) can be compensated through error correction.
QRCode Tools
The Hidden Danger of QR Codes | HackerNoon
Investigations & Researches I am very glad that you are reading my article again, dear friends! It would seem, what danger can a QR code pose? It turns out that you can even lose your cryptocurrency as well as fiat money and internet logins because of several attacks, which are based on the mechanics of QR codes.
https://hackernoon.com/the-hidden-danger-of-qr-codes
QR codes | Dan Hollick 🇿🇦
You've probably never noticed but every QR code has these alternating black and white dots called the Timing Pattern. These tell the reader how big a single module is and how big the whole QR code is - known as the version.
https://typefully.com/DanHollick/qr-codes-T7tLlNi
어디서도 보기 힘든 절묘한 수학적 귀납법의 활용 (귀납가설을 다섯번 활용?)
1️⃣2️⃣ Math 구독하기 👍 : http://bit.ly/3Pw2NOG 1️⃣2️⃣ Math 회원가입 👍👍 : http://bit.ly/3kiw8BM
https://youtube.com/watch?v=sIMbG0yAdx0&feature=shares
Edible QRCode
Researchers develop edible, 3D-printed QR codes embedded inside cookies
University of Osaka Researchers develop edible 3D QR codes embedded inside cookies
https://interestingengineering.com/innovation/edible-3d-printed-qr-codes-cookies
Effective encoding
10 > 64, in QR codes
QR codes reverse the usual order: decimal works better than base64 for encoding binary data, despite it requiring many more digits.
https://huonw.github.io/blog/2024/03/qr-base10-base64/