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Real time digital video image-stabilizing method based on hierarchical block matching

A real-time digital and video image stabilization technology, applied in the field of image processing

Active Publication Date: 2013-05-22
CHANGSHA JINGJIA MICROELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the traditional block matching image stabilization algorithm, the present invention provides a real-time digital video image stabilization method based on layered block matching

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  • Real time digital video image-stabilizing method based on hierarchical block matching
  • Real time digital video image-stabilizing method based on hierarchical block matching
  • Real time digital video image-stabilizing method based on hierarchical block matching

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Embodiment Construction

[0009] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. like figure 1 Shown, the real-time digital video image stabilization method based on layered block matching of the present invention comprises the following steps:

[0010] The first step is input image preprocessing.

[0011] N times downsampling processing is performed on the brightness component of the input image in the horizontal and vertical directions respectively.

[0012] In the second step, downsampled image motion search.

[0013] In the down-sampled image, a full search with a set range is performed on M search blocks respectively, and SAD-related information is counted during the search process, and is output together with the motion vector. Specific steps are as follows:

[0014] Step 1, perform a full search on each search block in the reference down-sampled image.

[0015] Let the width of the search window be SW, ...

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Abstract

The invention discloses a real time digital video image-stabilizing method based on hierarchical block matching. The method comprises the following steps: at first, a down-sampling processing on an input image is conducted; then full search of M number of search blocks in a down-sampling image is conducted in the setting range; the optimal motion vector is selected from the search blocks of the down-sampling image and output; further perfect and full search is further conducted in the original image according to the optimal motion vector of the down-sampling image, and a final motion vector of the original image is output; a motion trajectory of the original image is subjected to a low-pass smoothing filtering, and compensation for the image is calculated; a current image is compensated according to the compensation for the image. The real time digital video image-stabilizing method based on hierarchical block matching has the advantages that the method has high real-time property; overall motion and local motion can be distinguished effectively; and the method can adapt to various vibration frequencies and amplitudes, and is strong in robustness.

Description

technical field [0001] The present invention mainly relates to an image processing method, in particular to a real-time digital video image stabilization method based on layered block matching. Background technique [0002] With the increasing application of camera equipment, the camera platform becomes more and more diverse. Video signals obtained through vehicle-mounted camera systems, handheld camera equipment, aircraft or ship camera platforms, etc. are often shaken due to the movement of the camera. Video jitter will not only affect the visual effect, but also easily dizzy the viewer, leading to misjudgment and missed judgment, and brings difficulties to further image processing. How to convert these video signals into high-quality stable video has important theoretical significance and practical value. According to the principle of video image stabilization, commonly used image stabilization devices can be divided into three categories: mechanical image stabilization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21H04N5/14H04N5/232
Inventor 汤博王林黎鸿
Owner CHANGSHA JINGJIA MICROELECTRONICS
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