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Digital video image stabilization method based on multi-resolution block matching and PI (Portion Integration) control

A multi-resolution, digital video technology, applied in the direction of TV, color TV, image communication, etc., can solve problems such as difficult to estimate the effect, easy to fall into local minimum points, etc.

Inactive Publication Date: 2012-09-19
DALIAN UNIV OF TECH
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Problems solved by technology

However, the fast block matching methods in the traditional sense have the disadvantage of being easily trapped in local minimum points.
In addition, for images with different resolutions or low-quality stabilized video, it is difficult for existing motion estimation methods to obtain ideal estimation results.

Method used

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  • Digital video image stabilization method based on multi-resolution block matching and PI (Portion Integration) control
  • Digital video image stabilization method based on multi-resolution block matching and PI (Portion Integration) control
  • Digital video image stabilization method based on multi-resolution block matching and PI (Portion Integration) control

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Embodiment Construction

[0063] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0064] The digital video image stabilization method based on multi-resolution block matching and proportional integral control of the present invention comprises the following steps:

[0065] Step 100: Establish a motion model between frames: select the Similarity motion model to describe the motion of the image sequence to reflect the translation, rotation around the optical axis, and zoom motion between frames of the image sequence. The motion model is:

[0066] (1)

[0067] Among them, s represents the zoom factor of the camera, Represents the rotation angle of the image between frames, d x 、d y represent the offsets in the horizontal and vertical directions, respectively;

[0068] For security monitoring or hand-held imaging with small jitters, the deflection angle between frames of the image sequence small, it can be ap...

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Abstract

The invention discloses a digital video image stabilization method based on multi-resolution block matching and PI (Portion Integration) control. The digital video image stabilization method comprises the following steps of: obtaining a motion vector of a selected block through an improved diamond search algorithm, and obtaining a motion parameter of an overall motion vector by using least square estimation; then substituting the motion vector in a proportional-integral controller, namely a compensation unit of a core, so as to obtain a motion compensation vector; and further carrying out motion compensation on a fluctuation video sequence. With the adoption of the digital video image stabilization method disclosed by the invention, the fluctuation video sequence is subjected to fluctuation removal, so that the accuracy of the traditional diamond rapid search algorithm is improved, and the watching quality of a video is further improved. According to the acceleration of a chasing motion, the digital video image stabilization method can better keep a cashing component of a subjective motion and a subjective cashing motion of a photographer, so that the more accurate motion vector can be obtained through the estimation; the smaller stable state error is generated; and the fluctuation phenomena including translation, rotation, amplification and the like can be compensated according to demands.

Description

technical field [0001] The invention particularly relates to a digital video image stabilization method based on multi-resolution block matching and PI control. Background technique [0002] Digital Image Stabilization (DIS) is a new technology that integrates electronics, optics, computer and image processing to stabilize video image sequences. It has the advantages of high precision, strong real-time performance, small size, cheap price and low power consumption, etc., and has broad application prospects. With the popularity of video equipment and the wide application of video technology, the research on digital image stabilization technology has become one of the hot spots in the field of image processing. [0003] A typical digital image stabilization system includes a motion estimation unit and a motion compensation unit. The function of the motion estimation unit is to obtain the correct camera motion parameters, retain the artificial tracking component, and separate...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N5/14H04N5/232
Inventor 宋继飞高宇洋孙傲楠马晓红
Owner DALIAN UNIV OF TECH
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