Keyframe extraction method of sequence video

A technology of video key frame and extraction method, applied in television, image data processing, instruments, etc., can solve the problems of low precision and low efficiency, and achieve the effect of improving effectiveness

Inactive Publication Date: 2013-11-27
NANJING NORMAL UNIVERSITY
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[0006] The purpose of the present invention is to propose a sequence video key frame extraction method for the

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  • Keyframe extraction method of sequence video
  • Keyframe extraction method of sequence video
  • Keyframe extraction method of sequence video

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[0029] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the drawings.

[0030] Video data may contain more than 20 frames of images in one second. Considering that the sequence video data contains rich information and the characteristics of high overlap between adjacent frame images, the present invention proposes a method for extracting key frames of sequence video. The present invention is suitable for three-dimensional reconstruction and measurement of sequence video and compression of sequence video data. Traditional three-dimensional reconstruction methods mostly incorporate all sequence videos into the reconstruction process. Compared with traditional methods, the present invention can improve the quality of reconstruction and reduce the cost of reconstruction. The structure diagram of the present invention is in figure 1 The frame diagram of the key frame extraction method for sequence video is s...

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Abstract

The invention discloses a keyframe extraction method of a sequence video. The method comprises the following steps: (1) capturing the sequence video, dividing the sequence video into video frames, performing feature point extraction and matching on first n frames of images in the sequence video, and carrying out tracking on feature points; selecting two frames of images as an initial keyframe from the sequence video in terms of a base length, distribution conditions of the feature points and other constraint conditions; (2) determining a keyframe candidate set on the basis of obtaining the initial keyframe according to an image feature point matching rate; (3) further determining keyframe images from the keyframe candidate set in accordance with focal length change constraints and GRIC (Geometric Robust Information Criterion). According to the keyframe extraction method, the obtained keyframe images can be used for three-dimensional reconstruction and measurement of the sequence video and can also be applied to the compression of sequence video data and the like.

Description

technical field [0001] The invention belongs to the technical fields of computer vision, photogrammetry and image processing, and relates to a method for extracting sequence video key frames. Background technique [0002] With the development of technology, all kinds of digital products such as digital cameras, video cameras and mobile phones have become the necessities of people's life. These products have a common feature: they can easily obtain image data. Video is not only a popular entertainment medium, but also a true representation of historical features, environmental changes, and scene descriptions. Therefore, it can be said that images are an effective carrier to express the real world. In the face of people's urgent need for images that can truly restore the real world, it is necessary to fully mine the three-dimensional geometric information contained in images, and how to effectively solve this problem is a common challenge for computer vision and photogrammetry...

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Application Information

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IPC IPC(8): G06T7/20H04N7/26
Inventor 刘学军甄艳胡加佩
Owner NANJING NORMAL UNIVERSITY
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