Suspected target analyzing system and method by video investigation

Abstract

The invention discloses a suspected target analyzing system and a method by a video investigation, belonging to the field of a criminal investigation video analysis. The system comprises a video investigation comprehensive business device and a criminal investigation digital resource center device which are connected to each other through an exchanger. By using the system, the case field information is structured, various monitoring video formats are transcoded to an uniform format; each frame image of a fuzzy video including a suspected target is enhanced to form a video enhanced segment; a suspected target video segment is obtained through the suspected target index with zero loss and low false drop rate; the unified semantic electronic mark is carried out on the suspected target video segment; the suspected target is found, screened and tracked by performing the space analysis, action analysis, trajectory tracking, positioning trace analysis of telephone and electronic payments, time sequence analysis, feature contrasting and analysis; furthermore, the system and the method can be widely applied to the video investigation and case solution.

Description

technical field [0001] The invention relates to video investigation of suspect targets in criminal investigation, in particular to a video investigation suspect target analysis system and method. Background technique [0002] A large number of established video surveillance systems have been widely used in public security criminal investigations. The video investigation technology of finding case clues and tracking suspects from video recordings has become the technical support for investigating and solving crimes. However, due to the lack of effective technical means, and the wide monitoring area and large amount of video involved in the case, the manual operation method of video browsing and analysis adopted in the current video investigation work is difficult to find and lock the suspected target from the massive video, which consumes a lot of cases. The precious time and energy of the analysts has missed the golden opportunity to solve the case. The main problems include...

AI Technical Summary

Problems solved by technology

However, due to the lack of effective technical means, and the wide monitoring area and large amount of video involved in the case, the manual operation method of video browsing and analysis adopted in the current video investigation work is difficult to find and lock the suspected target from the massive video, which consumes a lot of cases. The precious time and energy of the analysts has missed the golden opportunity to solve the case. The main problems include: 1) The unified format of the surveillance video; currently there are many video surveillance platforms and equipment manufacturers, and the encoding formats of the video recordings are different. There are different calling methods; in criminal investigation and solving a case, when the surveillance video of the business unit or residential area around the crime scene is called, it is often necessary to obtain a player from the corresponding manufacturer to watch it

2) The problem of video enhancement; in the actual video surveillance environment, due to the influence of factors such as light, rain and fog, device quality, low-resolution cameras, and wide-angle lenses, the recognition of video images decreases, and it is impossible to obtain valuable information from original surveillance videos. clues

3) The problem of suspicious target retrieval; in the current video investigation work, criminal investigators watch and record based on browsing videos, even when few active targets appear in surveillance videos at night or in remote areas, they can only Browsing all the videos without missing even a "one second"; Browsing video for a long time is very easy to cause visual fatigue of criminal investigators, which will affect the quality of video browsing work, and even cause visual impairment of investigators

Therefore, it is time-consuming, laborious, and inefficient for investigators to manually browse and search for suspected targets.

4) The problem of comprehensive research and judgment. In the video investigation work, investigators obtain and record a large amount of suspect target information by browsing and analyzing surveillance videos. Due to the current manual operation method, a large amount of suspect target information is scattered and retained sporadically. In the notes and brains of the investigators, it is impossible to discuss the case conveniently and effectively. It is necessary to organize, analyze, and judge the suspect target information through continuous meetings to exchange information and manually draw various charts, resulting in cumbersome work and low efficiency.

5) Difficulties in the management of criminal investigation digital resources; most of the criminal investigation and case-solving data are stored in a scattered manner, making it difficult to carry out cross-regional and cross-time criminal investigation business collaborative processing, and it is difficult to conduct unified management of criminal investigation data

[0003] Patent No. "200910092740.1" and a patent titled "A Method and System for Auxiliary Analysis of Video in Criminal Investigation and Solving Cases" propose a method and system for auxiliary analysis of video in criminal investigation and solving crimes; the analysis method includes establishing case files, collecting case videos and establishing For the relationship with the case, after video decoding by the manufacturer’s decoding component, image analysis is performed on the image frame to extract the characteristic information of suspicious targets and stationary targets, obtain the characteristic information of suspicious targets according to the retrieval conditions, play video clips, display the position and trajectory of information, and Image enhancement; but the shortcomings are that there is no video investigation business processing centered on suspected targets; browsing, video analysis and image processing cannot be performed for video formats that cannot provide manufacturers' decoding components; unified management of suspected targets is not possible

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