Electronic image stabilization method based on inertial navigation information

An electronic image stabilization and motion information technology, which is applied in the field of electronic image stabilization based on inertial navigation information, can solve problems such as image stabilization failure and complex scenes, and achieve improved calculation accuracy, good electronic image stabilization effect, and improved intra-frame image blur Effect

Inactive Publication Date: 2012-11-14
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, traditional electronic image stabilization also has a big technical bottleneck. Traditional electronic image stabilization methods simply use image information to stabilize the captured video images. However, due to the complexity of the scene, the image stabilization will fail.

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  • Electronic image stabilization method based on inertial navigation information
  • Electronic image stabilization method based on inertial navigation information
  • Electronic image stabilization method based on inertial navigation information

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Embodiment Construction

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0022]The core principle of the electronic image stabilization method for inertial navigation in the present invention is: firstly, extract feature points in turn for each image in the video sequence, and then use the feature point matching algorithm to perform global motion estimation on two adjacent frames of the video sequence, At this stage, if there is a large error in the global motion estimation, the motion information obtained by the accelerometer and gyroscope in the inertial navigation system will be directly used to est...

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Abstract

The invention provides an electronic image stabilization method based on inertial navigation information. The method comprises the following steps that: firstly, feature points of each image of a video are extracted, subsequently the overall motion estimation is carried out on two adjacent frames by using a feature point matching algorithm; if the overall motion estimation has larger errors, the overall motion is estimated by using motion information obtained by an inertial navigation system so as to compensate the errors caused by the fact that the overall motion is estimated by merely using an image; the overall motion estimation adopts an affine transformation model; then motion filtering is carried out on the model in combination with the image and the inertial navigation information so as to distinguish the active motion and a trembling component of a camera; and moreover, a rotational component introduced because of the trembling is determined; and furthermore an original video image is compensated by using the obtained trembling and rotational components so as to obtain a stable video; and the image restoration treatment is carried out on each frame of image of the video in combination with the image information and the inertial navigation prediction motion information. The method needs no complex hardware and is good in electronic image stabilization; and the calculation precision is improved.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to an electronic image stabilization method based on inertial navigation information. Background technique [0002] During the shooting process of the camera, if the camera is not fixed on a stable tripod or other fixtures, the captured image will shake. For example: during the flight of an aircraft, due to the turbulence affected by the airflow, the image captured by the airborne visible light or infrared sensor shakes; It will also cause the captured image to be very unstable; in the process of shooting with a hand-held camera, shaking of the captured image due to shaking of the human hand will affect the viewing quality of the captured video. Due to this random jitter, the target to be focused on in the image shakes back and forth in the display window, which will cause the observer to feel fatigued, resulting in misjudgment and missed judgment, and will also bring diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G06T7/20
Inventor 张利于昕张顺利随尧尚忠良
Owner TSINGHUA UNIV
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