Method and device for extracting subtitles

Abstract

The invention discloses a subtitle extraction method and device; the method includes: decoding a video to obtain a video frame, performing a connection operation on pixels in the video frame in the subtitle arrangement direction to obtain a connected domain in the video frame; The connected domain determines the video frame that includes the same subtitle, and based on the distribution position of the connected domain in the video frame that includes the same subtitle, determines the subtitle area in the video frame that includes the same subtitle; correspondingly constructs a component tree for a plurality of channels in the subtitle area, utilizes The constructed component tree extracts the contrast extreme value area corresponding to each channel; performs color enhancement processing on the contrast extreme value areas of multiple channels to form a color enhanced contrast extreme value area; fuses the color enhanced contrast extreme value areas of multiple channels. The implementation of the present invention can effectively filter out the strong interference background of light and clothing in the image of the subtitle area, so as to better separate the background from the subtitle, and is beneficial to improve the efficiency and accuracy of subsequent character recognition.

Description

Technical field [0001] The communication video technology of the present invention particularly relates to a method and device for extracting subtitles. Background technique [0002] Currently, there are various recording methods for subtitles in video files, such as embedded subtitles, embedded subtitles, and external subtitles. Among them, the embedded subtitle is when the subtitle is overlaid on the video frame of the video, it is integrated with the video frame of the video. No matter how the video format changes, the size, position, and effect of the subtitle remain unchanged. Built-in subtitles encapsulate video files and subtitle files into multiple audio tracks and multiple subtitle tracks, and dubbing and subtitles can be selected during playback. The subtitle file corresponding to the external subtitle is independent of the video file. When the video needs to be played, the standby subtitle file is loaded on the video by the video player. [0003] The video player of th...

AI Technical Summary

Problems solved by technology

[0003] The video player of the terminal supports various forms of subtitles, but it is difficult to extract and recognize all forms of subtitles. In this way, users cannot extract subtitles in text form for sharing or recording during the process of watching videos

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