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Anisometric zooming method of video images without perceptive distortion of important content

A video image, scaling technology, applied in the direction of image communication, image data processing, graphics and image conversion, etc., can solve the problem of large scene distortion

Inactive Publication Date: 2012-05-16
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-proportional scaling method of video images without perceptual distortion of important content, which solves the problem of large scene distortion when adopting the existing equal interval sampling or equal interval interpolation method to zoom the video

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  • Anisometric zooming method of video images without perceptive distortion of important content
  • Anisometric zooming method of video images without perceptive distortion of important content
  • Anisometric zooming method of video images without perceptive distortion of important content

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Embodiment Construction

[0049] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] The important content of the present invention is a non-equal scaling method for video images without perceptual distortion, which is specifically implemented according to the following steps:

[0051] Step 1: Segmentation and packaging of key frames

[0052] Consider real-time requirements, such as figure 1 As shown, this method sets several (nine recommended) rectangular detection windows 1 at equal intervals on the original video frame to detect changes in the texture of the image frame within the window. If its texture changes, pack the frame before the change into video packet A 1 , forming an independent package. Use the same method in turn to get A 2 , A 3 ,....... The first frame in each packet is set as the keyframe of the video sequence.

[0053] Step 2: Video Frame Scaling in Standalone Package

[0054] In each indep...

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Abstract

The invention discloses an anisometric zooming method of video images without perceptive distortion of important content, which comprise the following steps of: firstly, packing key frames separately; then, zooming the video in an individual package, orderly defining video energy, determining the lowest energy line, selecting the optimal lowest energy line, and duplicating or deleting the same optimal lowest energy line for isometric zooming; and finally, conducting continuity processing between adjacent individual packages. The anisometric zooming method of video images without perceptive distortion of important content preprocesses the video, defines an energy function in a spatial domain and a time domain, ensures that the visual important content has high energy and the secondary content has low energy, and then deletes or duplicates the optimal energy line of a video sequence so as to complete the anisometric zooming of the video.

Description

technical field [0001] The invention belongs to the technical field of non-uniform aspect ratio conversion of video images, and relates to a method for perceiving important content of video and maintaining video continuity, and in particular to a non-uniform scaling method of video image without perceptual distortion of important content. Background technique [0002] With the widespread application of digital media information and the improvement of the convenience of digital video acquisition, various display devices have put forward higher requirements for digital media. At the same time, with the popularity of large-screen LCD TVs, the conflict between 4:3 TV signals and 16:9 screen sizes has become increasingly urgent. This requires non-proportional scaling of the original video. In addition, since the video has the requirement of temporal and spatial coherence and more than 25 frames per second, it is necessary to adopt some method to make the video real-time and cohe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40H04N5/14
Inventor 唐铭谦田玉敏朱萌蒋云晶
Owner XIDIAN UNIV