The black and white block of the two-dimensional code is equivalent to 0 and 1 in computer language, and there are 37 points in the horizontal and vertical directions. A * * has 1 177 points in addition to the edges with 8 points at each corner.
That is, the representative information can be 2 1 177, and the result is 2.0526 * 10 354 without considering the influence of fault tolerance and various patterns or Logo added in the middle.
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In fact, the QR code was invented by the Japanese. The inventor Teng Hong was originally from Denso, Japan. This company became independent from Toyota Motor Corporation in 1949, but its main business is still supplying auto parts to Toyota.
Because high-precision auto parts need to match a lot of information, and the traditional bar code information capacity is very limited, Teng Hongyuan led the team to overcome this difficulty for two years.
Upgrade the one-dimensional code on the previous label to the two-dimensional code, and the information reserve has increased by 250 times!
However, the Japanese didn't realize the business opportunities on the QR code and thought it was useless except for storing information.
Although I applied for a patent, I gave up the patent claim of daily use of QR code. I just need them to make you a QR code, so I don't have to spend money.
At that time, Teng Hongyuan certainly didn't expect the QR code to have such a broad application prospect, otherwise it wouldn't be used for free.
According to statistics, in 20 17 years in China alone, the payment using QR code in mobile payment reached 500 billion times. If you collect a penny at a time, you can earn 5 billion.
20 14 is the 20th anniversary of the invention of QR code. The European Patent Office awarded 20 14 "European Invention Award" to Teng Hongyuan, but Teng Hongyuan stubbornly believed that QR code was useless and its service life was up to ten years.
References:
Phoenix Net Technology-The Japanese invented the QR code to make China people earn money and collect patent fees.