primary classification of fingerprints

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The fingerprints were made up of the grease and sweat on the skin, and these substances would remain on the surface of the object. Fingerprints usually did not disappear in a few days, and fingerprints were an important means of solving cases. Even if the fingerprints were left at the scene and wiped with gloves, it was still possible to be detected. The fingerprint identification technology was widely used in criminal investigation. It had the advantages of high accuracy and simple operation. The formation mechanism of fingerprints was the bulge from the corium to the skin. If only the skin layer was damaged and the corium was not damaged, the fingerprint pattern should be the original pattern. However, there was no clear answer in the search results regarding the specific time of disappearance of fingerprints and whether fingerprints could be detected on all items touched by people.

According to the research of the National Institute of Intelligence in Japan, with the current technology, as long as the victory gesture (scissors hand) was taken within 3 meters from the camera, the fingerprint of the subject could be read from the photo. Since many people took selfies within one meter, if the pictures were not compressed and released directly, it would increase the chances of fingerprints being stolen. And for celebrities with high photo exposure, the risk of fingerprint information being stolen was higher. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

There were many reasons why the police station took fingerprint photos: 1. ** Criminal Investigation **: - In criminal cases, fingerprint photography was an important means of collecting evidence. For example, in the criminal case that happened in Kaili in 1998, auxiliary police officer Yang Xiaoyu solved the case by searching and comparing hundreds or even thousands of distorted fingerprints. If there were fingerprints left at the scene, they could be compared with the suspect's fingerprints to determine whether they had been to the crime scene and thus lock the suspect. For example, when Huang Dekun entered his fingerprints at the Shuanggui, he was found to be a suspect because he matched the fingerprints left at the scene of the massacre 18 years ago. - During the investigation process, taking fingerprints of relevant personnel would help to establish a case clue database, which would facilitate subsequent investigation and comparison work. 2. ** Assist in investigation or filing **: - Sometimes, the police station would collect fingerprints, photos, and other personal information just to assist in the investigation or for the record. For example, in some cases, even if there was no specific administrative punishment or criminal case involved, the information would be saved in the database of the public security department for future use. If only relevant information was collected and no specific administrative punishment or criminal case was involved, then this information would not become the so-called " criminal record." Only those who had been tried by the court according to the law would have a criminal record, which was the "criminal record". 3. ** Daily Management and Service **: - For example, in the ID card business, some ID card photo application all-in-one machines integrated photo collection, Face Recognition, identity verification, fingerprint collection and other functions into one. They were used for self-service acceptance functions such as expired ID card replacement, damaged ID card replacement, lost ID card replacement, etc. This helped to ensure the accuracy and security of the identity information. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

If the camera was close enough when taking the photo, the " Scissorhands " photo could restore the fingerprint information of the person through photo zooming and artificial intelligence technology. Basically, the fingerprints of the subject could be restored 100% in a photo taken within 1.5 meters. The fingerprints could be restored 50% in a photo taken between 1.5 meters and 3 meters. It was difficult to extract the fingerprints in a photo taken more than 3 meters. After the fingerprint information was extracted from the photo, it was made into a fingerprint film with professional materials. It could be used by criminals to identify identities through fingerprint technology, such as fingerprint door locks, fingerprint payment, etc. However, taking photos to obtain fingerprints had to be carried out under very harsh conditions. The resolution of the camera, the angle of the image, the surrounding light, and so on would all affect it. It was not possible to obtain fingerprints by taking photos at will. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>