Method for simply and fast redirecting video

Abstract

The invention discloses a method for simply and fast redirecting a video and belongs to the field of video processing. The method for simply and fast redirecting the video is based on content and is suitable for different user terminals. The video with a fixed size can be self-adaptively displayed on terminal devices of different types, and when the length-to-width ratio of the video is changed, the fact that an important object is free of tensile deformation can be maintained as far as possible, and the ornamental quality of the video is ensured. An algorithm is simple in overall operation, a subsequent real-time processing module is high in speed, real-time processing can be carried out on different targets and sizes, and flexibility is good. The method has good developing and application prospect in the field of streaming media playing. The method divides the whole processing algorithm into a pre-processing part and a real-time processing part, a complex important degree calculation and a calculation of analyzing lens shift are placed in a pre-processing module, and the real-time processing module only needs to call the pre-processing result. In addition, the idea of overlaying the important degree between frames is used for ensuring the zoom consistency of the content of the front frame and the rear frame, and the method has certain application value.

Description

technical field [0001] The invention relates to content-aware-based video scaling technology in the technical field of video processing, and in particular to the research and realization of a simple and fast video redirection method. Background technique [0002] With the rapid development of Internet technology and the continuous improvement of the hardware level of digital devices, terminal devices suitable for different networks are constantly updated, such as TVs, notebook computers, PDAs, mobile phones, etc., which have different types of display sizes. However, most video They are all produced with a certain fixed size and aspect ratio. When displaying them on different types of digital devices, it is usually necessary to change their size and aspect ratio to adapt to various display devices. Traditional image scaling methods are mainly divided into three types, one of which is to interpolate or downsample the original image to obtain an image of the target size, which...

AI Technical Summary

Problems solved by technology

Traditional image scaling methods are mainly divided into three types, one of which is to interpolate or downsample the original image to obtain an image of the target size, which is the so-called uniform scaling technology. , which tends to cause stretching of the main content of the image

Another method is a simple cropping technique, which obtains the target size by cutting off the edge content of the image, which will cause more loss of content information

The third method is to select the minimum scaling ratio of the image width or height as the overall scaling ratio to scale the original image proportionally. This method is also called "letterbox" technology. Black borders are generated on both sides, which cannot make full use of the limited screen resources of mobile devices

Scaling each frame of the video individually will inevitably lead to flickering or wavy phenomena in the resulting video

This is due to the lack of consideration of the temporal relationship of video frames, resulting in the destruction of the adjacent relationship of pixels on the time axis of the original video content after scaling processing, and no consistent scaling of the corresponding target objects between frames.

Since the camera may pan, flip, zoom, etc. when shooting a video, and the content of the captured video may also change dynamically, it is quite difficult to obtain a satisfactory content-aware video scaling result. challenging

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