Video investigation refers to a kind of investigation measure that the investigation organ realizes the dynamic analysis and comprehensive judgment of the crime through four links: retrieval, review, analysis and application of video surveillance data according to the needs of the case, so as to find and determine the criminal suspect, find clues to solve the case and provide direction for case investigation.
With the continuous expansion of video surveillance scale, it also brings a huge amount of video data, which makes the traditional video clue search based on crowd tactics like looking for a needle in a haystack. The demand for intelligent analysis and fast video analysis and retrieval of various police situations is increasingly prominent in the investigation department of police cases. At present, the means of public security informatization has shown a situation of being unable to cope with its needs, and it faces the following severe challenges:
(1) There is no unified management platform for different monitoring networks such as safe city, road monitoring and social monitoring, and the monitoring cameras are widely distributed, and the management is chaotic, making it difficult to retrieve images;
(2) Video formats are diverse and complex, and the lack of unified video index management and playing tools leads to low viewing efficiency, which greatly limits the utilization efficiency and scope of video surveillance materials;
(3) Uneven video quality affects police officers' accurate judgment of suspected targets;
(4) It is time-consuming and laborious to watch video manually, and the target clues are scattered, so it is impossible to achieve effective clue comparison and resource sharing, and it is easy to miss suspected targets and delay fighters.