What Is Fingerprint Evidence?

Each person's fingerprint is unique and will not change for life. Fingerprint resolution refers to a technique for identifying criminals through fingerprint identification. One of the most famous fingerprinting cases in history was a bloody case in Argentina in 1892. Finally, the police brought the criminals to justice through fingerprints. With the development of science, people have invented an automatic fingerprint recognition system, which greatly increased the scientific and technological content of the case.

Fingerprint resolution

Everyone's fingerprint is

History of fingerprint cracking abroad and its application today

In the summer of 1892, a bloody murder occurred in a small town called Necocoa in Argentina. A single woman, Francesca, reported that her two children (a boy was 6 years old and a girl was 4 years old) were smashed with stones and killed at home. According to the Francesca newspaper, the town's man, Velasque, proposed to her and was threatened by her after she refused to claim to kill her child. Moreover, when she returned home on the day of the crime, she met Velasque hurriedly out of her house. Verasque was arrested for this purpose by the La Plata police station, which governs the town. However, Velasque said nothing to admit that he killed the two children. He also handed over a credible proof that he was virtually absent on the day of the crime.

La Plata Police Chief Sergeant Alfarez came to the scene again with police officer Vosetti. They searched the bedroom at the time of the homicide, and still could not find any clues. When they were disappointed to leave, the sheriff suddenly saw a tan finger blood mark on the door frame in a ray of sunlight. Alfarez knew that his colleague Vossetti was studying the differences in the fingerprints of human fingers, so he and he brought the blood fingerprints back to the police station along with the wood of the door frame. After research, they found that the fingerprint was a human thumb. As a result, the sheriff asked the suspect Velasque to check the thumbprint, but the results did not match. Then he called Francesca. Surprisingly, her thumb print matched the blood mark on the door frame. Francesca was stunned even by herself. She had to admit that she was trying to marry her loved one, who was so annoying that the child hated him, and he had a bad heart to kill her two biological children.

Encouraged by the case, Vosetti wrote his own research results specifically as "Fingerprints" and the Argentine police authorities have begun to formally use fingerprints to identify and solve cases. Since then, this method of crime detection has finally been widely used by police departments around the world. And with the in-depth study of fingerprints, people find that everyone's fingerprints are different in the world. Many countries now store fingerprints of some crimes in the computers of police stations. When a case is detected, the fingerprints extracted from the scene need only be checked with the archives to determine whether these crimes have been re-offended.

Fingerprint recognition refers to identifying by comparing the detailed feature points of different fingerprints. Since each person's fingerprint is different, that is, there are obvious differences between the ten fingers of the same person, the fingerprint can be used for identification. In fact, in ancient China, fingerprints (handprints) were used for signing. In 1684, plant morphologist Grew published the first scientific paper on fingerprints. In 1809 Bewick used his fingerprint as a trademark. In 1823, anatomy Purkije classified fingerprints into nine categories. In 1880, Faulds advocated the use of fingerprints to identify criminals in the journal Nature. In 1891 Galton proposed the famous Galton classification system. Since then, the British, American, and German police departments have adopted fingerprint authentication as the main method of identification. With the development of computers and information technology, the FBI and the Paris Police Station began to develop automatic fingerprint identification systems (AFIS) for criminal case detection in the 1960s. At present, police stations around the world have widely adopted automatic fingerprint identification systems. In the 1990s, an automatic fingerprint identification system for personal identification was developed and applied. Because the orientation of each seal is not exactly the same, different focus points will cause different degrees of deformation, and there are a lot of fuzzy fingerprints. How to correctly extract features and achieve correct matching is the key to fingerprint recognition technology. Fingerprint recognition technology involves many disciplines such as image processing, pattern recognition, machine learning, computer vision, mathematical morphology, and wavelet analysis.