System and method for adaptively generating thumbnail abstract based on video data
A technology of video data and thumbnails, which is applied in the field of image processing, can solve problems such as taking a long time and not being able to provide high-quality law enforcement reference data, and achieve clear and effective results
Inactive Publication Date: 2020-10-30
HANGZHOU XUJIAN SCI & TECH CO LTD
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Problems solved by technology
There is a disadvantage of the law enforcement recorder without a video thumbnail summary, that is, it takes a long time to analyze the law enforcement video data in the later stage. Without a shake-free and clear video thumbnail summary, the law enforcement recorder cannot provide high-quality law enforcement reference data
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[0049] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
[0050] The basic idea of the present invention is to decode the video data into frame data; obtain the frame data according to the set period, and write the obtained frame data into the buffer queue, and write the frame data in the buffer queue into the frame data buffer pool every two frames at the same time ;Get two adjacent frames of data from the frame data buffer pool, and extract the key points respectively; calculate the critical value T according to the two key points; calculate the corresponding matching vector according to the two key points, and calculate the sum of the vector distances Distance; judge whether the image is distorted according to the sum of the critical value T and the distance of the vector Distance. If the current image is distorted, the current frame...
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The invention relates to the field of image processing, in particular to a system and a method for adaptively generating a thumbnail abstract based on video data, and the system comprises: a frame data decoder module which is used for decoding the video data into frame data; a frame data selector module which is used for acquiring frame data according to a set period; a frame data feature point extractor module which is used for obtaining two adjacent frames of data from the frame data cache pool and respectively extracting key points; a critical value calculation module for image dithering which is used for calculating to obtain a critical value T; an adjacent frame feature comparator module which is used for calculating the sum Distance of the distances of the vectors; and a thumbnail generator module which is used for judging whether the image is distorted or not according to the sum Distance of the critical value T and the vector, wherein if the current image is distorted, the current frame data is not stored as the thumbnail abstract of the video, and if the current image is not distorted, the current frame data is stored as the thumbnail abstract of the current video. According to the method, the clear and effective video thumbnail can be automatically, adaptively and quickly generated.
Description
technical field [0001] The invention relates to the field of image processing, in particular to a system and method for adaptively generating thumbnail summaries based on video data. Background technique [0002] The law enforcement recorder is a special audio and video collection device used by law enforcement personnel to record the process of law enforcement. It integrates functions such as camera, photo, intercom, and navigation. Recording video, the static scene is to take photos. Currently, the law enforcement recorder on the market does not have the function of generating thumbnail summary for the video recorded by the law enforcement recorder, especially the real-time and automatic recording video screen of the law enforcement recorder is not realized. Whether to dither when generating thumbnail summaries. There is a disadvantage of the law enforcement recorder without a video thumbnail summary, that is, it takes a long time to analyze the law enforcement video data...
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IPC IPC(8): H04N21/845H04N21/8549G06K9/00G06F16/74
CPCH04N21/8549H04N21/8455G06F16/74G06V20/46
Inventor 何书强陈尚武
Owner HANGZHOU XUJIAN SCI & TECH CO LTD