A method for compressing movie by keeping a high resolution frame per person.
Publication Date: 2016-Jul-26
The IP.com Prior Art Database
This is a method to improve compressing ratio by keeping a high resolution frame per person.
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A method for compressing movie by keeping a high resolution frame per person. This invention is related to compressing movie.
Movie is made from multiple frames. There are tow type of compression to reduce movie file. One is compression each frame. Another is compression by using difference of neighbor frame.
Recently, a digital video camera can detect a human face, focus to the face and control brightness for it. Even if there are multiple people, it can detect each face and specify a people who is registered beforehand.
For video surveillance, digital camera is used. Especially, when a user keep movies of multiple video surveillance cameras for a longtime, huge storage is required. On the other hand, it is not realistic to spend a lot of money for the storage because the movie does not produce a profit. Though we can reduce movie file size by decreasing resolution, it is too hard to detect a person in the frame to decrease resolution. That is the problem solved by our invention.
At compressing movie, we improve compression ratio by keeping a high resolution frame per person. For selecting high resolution frame, it is not needed to select a frame which has biggest figure of a person. We can select a frame which has figures of multiple persons and the each figure size is enough big to reduce the number of high resolution frames. It is a good policy to check not only the size of figure but also face direction and/or focus is good or not. It is appropriate to scor...