Riding the wind of rebirth

Xu Anran is a well-known name in the current machinery manufacturing industry. This is mainly because most domestic car manufacturers have adopted Jinan Group's equipment for door locks and intelligent upgrades. After all, many manufacturers still admire foreign products and think that it's no problem to give equipment used by Audi and BMW an exemption from inspection.

In addition, many banks and vaults have adopted Jinan Group's anti-theft door locks. Jinan Group has a presence in the market for almost all types of anti-theft equipment, from professional to home use.

Xu Anran's many patented designs were no longer forgotten as they had been in his previous life. With the identity of a famous entrepreneur, people began to create legends and remarkable figures. They then discovered that this young man, who started with security door locks, had hundreds of patents under his name, and that the number was increasing every year.

Furthermore, his inventions covered a wide range, from machinery to radio, from medical devices to auto parts, from park fitness equipment to CNC machine tool fixtures, and even a few glass formulas and alloy cutting wire formulas. He was practically a modern-day Edison.

Xu Anran has now become a model of a young person who, despite not having formal training, does not give up on himself and strives to become self-taught. Various honors have come one after another as Jinan Group has grown and expanded. In the words of Anran's cousin in private, "I just tinker around with things and try to come up with whatever I think of that can be used. How come I'm being called an inventor?"
Whether he is suitable or not is another matter, but Xu Anran still holds considerable weight in the hearts of young scientific and technological inventors.

Therefore, when Xu Anran issued the call for volunteers for the five-axis linkage machine tool hardware breakthrough project, people from all walks of life came to join him. Some were attracted by the high salaries offered by the R&D center of Jinan Group, while others were genuinely drawn to Xu Anran's reputation as a "modern Edison." Many more, however, were driven by a burning passion for serving their country, hoping to break free from the predicament of being held back by the West's technological bottlenecks, and were determined to create a "money-making machine."

Xu Anran divided these people into several large groups: the mechanical group, the materials group, and the motor group, and organized them to tackle the problems respectively.

Then a team member suggested that the key to five-axis CNC linkage technology was not here, but in the CNC part. Xu Anran laughed and said that there were other experts in this part, so we didn't need to worry about it.

This project is now a major project that all parties are paying attention to, and corresponding resources are being allocated to it. Therefore, Zhou Zhi felt that Su Datou's transfer from Qianxing to the five-axis R&D team was not a punishment, but a promotion.

"I hope Cousin Anran can keep him in check." Zhou Zhi also sighed, "This kid is quite well-behaved in front of people who are smarter than him. No one can control him in Qianxing, which is why he has room to be arrogant. Now that he's in a place where smart people gather, he should behave himself."

"Let's get back to our matter. Can you grant us the authorization?"

"That's no problem. What fingerprint recognition technology are you planning to use?" Zhou Zhi felt that comparing algorithm authorizations was not an issue. He was more concerned about what kind of fingerprint recognition Jin'an was using, because there are actually quite a few recognition models for this, and people have studied them quite thoroughly. The meaning of "studied thoroughly" is that they are easy to forge.

Fingerprint recognition technology is not a new high technology at all; the practice of "pressing handprints" has existed since the Zhou Dynasty.

However, at that time, fingerprints were more of a form of initiating a vow, a ritual, and did not serve an identification function.

By the Han Dynasty, it was stipulated that fingerprints could be used as legal markings on documents. During the reign of Emperor Yuan of Han, the court issued a decree explicitly recognizing the legal status of fingerprints as court evidence. This marked the beginning of the application of ancient fingerprint technology in the judicial field.

Jia Gongyan of the Tang Dynasty in China was the first scholar in the world to explicitly propose the use of fingerprint identification. It was also from the Tang Dynasty that ancient people began to use fingerprints extensively. During the Song Dynasty, the famous writer Huang Tingjian successfully used fingerprints to apprehend criminal suspects. He also recorded in his notes: "Nowadays, confessions and contracts also have fingerprints, because it is rare for two people to touch the same hand, making it the easiest way to distinguish between genuine and fake."

This fully demonstrates that people at that time understood that fingerprints were personal biometrics with the function of identification, and used them in judicial practice and civil cases.

The Song Dynasty jurist Song Ci further summarized the scientific laws of "three major categories and six types of fingerprints" through empirical evidence, and systematically introduced the fingerprint identification method in his book "The Washing Away of Wrongs".

Therefore, China has been leading the world in this technology for thousands of years, and it is no longer considered novel.

In essence, fingerprint recognition technology works by recognizing that each person's fingerprint is unique in its pattern, breaks, and intersections, and is preserved for life. This uniqueness allows a person to be matched with their fingerprint, and by comparing their fingerprint with pre-stored fingerprint data, their true identity can be verified.

However, according to international norms, fingerprint images are considered personal privacy and therefore cannot be stored directly. This is due to relevant laws in the United States, but the vast majority of biometric technology companies comply with this rule and therefore do not directly store fingerprint images but rather store feature values ​​obtained from various digital algorithms.

Each fingerprint has several unique, measurable feature points, and each feature point has about five to seven features. Generally, ten fingers can produce five thousand independent measurable features, which is enough to make fingerprint recognition a reliable identification method in a wide range of applications.

"We already have some technological reserves in this area. The Capital Institute of Biometrics has invented an algorithm based on fingerprint pattern, pattern area, core point, triangular point and fingerprint count, and we plan to combine it with your coupling technology to form a complete fingerprint lock technology."

This algorithm technology is not actually surprising. As I said before, Huang Tingjian was an expert in fingerprint identification, which shows that the world's smartest people have been studying it for thousands of years.

"Actually, I'm more concerned about your data collection technology."

"The mainstream technologies now are optical acquisition and semiconductor silicon technology acquisition." Xu Anxin must have done her homework before coming here: "It's just that CMOS technology sensors are still a bit expensive. Optical technology, on the other hand, is easy to implement cheaply."

The so-called acquisition technology is essentially about how to obtain good fingerprint images. This problem seems simple, but it is actually quite complex.

In general, it uses a differential recognition technology to distinguish the grooves and ridges of a fingerprint, allowing the device to read the ridges and valleys of the fingerprint image, form an image, and further process it into digital feature values.

The first technology that comes to mind is, of course, optical technology. A finger is placed on an optical lens, and under the illumination of a built-in light source, it is projected onto a CCD using a prism. The device then processes this image into a multi-grayscale fingerprint image. (End of Chapter)