Video Key Frame Extraction Method
A technology of video key frame and extraction method, which is applied in the direction of image communication, selective content distribution, electrical components, etc., can solve the problems of large amount of calculation in detection and extraction algorithms, neglect of time domain information, etc., and achieve fast processing speed and low amount of calculation small effect
Active Publication Date: 2020-09-08
王少华
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The subtitle information is concise and concise, which has a good generalization effect on the video content. At present, the extraction of video subtitles is usually limited to the spatial domain information, while ignoring the time domain information, resulting in a large amount of calculation for such video subtitle detection and extraction algorithms.
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[0036] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0037] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0038] Overall, such as...
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The invention discloses a video key frame extraction method and relates to the technical field of video image processing methods. The method comprises the steps of: extracting spatiotemporal subtitles of video with subtitles; calculating the extracted spatiotemporal subtitle visual energy (Spatiotemporal Subtitle Visual Energy, referred to for short); generating a curve according to the extracted spatiotemporal subtitle visual energy; detecting the curve, and extracting the key according to the curve frame. The method uses spatio-temporal subtitles to model visual energy, and finally extracts key frames by detecting the rising edge of the curve. Experimental results prove that the method has less calculation and faster processing speed.
Description
technical field [0001] The present invention relates to the technical field of video image processing methods, in particular to a video key frame extraction method. Background technique [0002] Information technology is changing with each passing day and is changing every aspect of people's lives. With its rich information content, various display methods, and convenient transmission and storage forms, multimedia video quickly replaces traditional paper texts and real classroom teaching, forming a widely disseminated academic lecture video. Academic lecture videos are booming because they are not limited by time and space, such as NetEase Open Classes, Superstar Academic Videos, Tencent Classrooms, MOOCs, TED, All Classes, etc., and the amount of video data has shown a blowout growth. Facing the vast sea of academic lecture videos, traditional methods such as fast forward, rewind, and keyword search can no longer meet the actual needs. How to quickly and accurately retri...
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IPC IPC(8): H04N21/8549H04N21/44H04N21/488H04N21/435
CPCH04N21/435H04N21/44H04N21/44008H04N21/4884H04N21/8549
Inventor 张云佐张莎莎朴春慧沙金郑丽娟霍磊王欢耿鹏袁凌利
Owner 王少华