Digital image stabilization device and method

a digital image and stabilization device technology, applied in the field of digital image stabilization, can solve the problems of unsteady video camera producing video with high frequency jitter, video camera may shake or jitter in the operator's hand, and digital image sequences captured from physical imaging devices often display unwanted high frequency jittering motion. achieve the effect of high efficiency

Inactive Publication Date: 2012-06-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Benefits of technology

[0013]An aspect of the invention provides a highly efficient process of identifying feature points, and of deriving motion vectors for the ...

Problems solved by technology

Thus, the video camera may be shaking or jittering in the operators hand while capturing the image or video.
On the other hand, an unsteady video camera produces video with high frequency jitter (translational and/or rotational) throughout the video images.
Digital image sequences captured from physical imaging devices often display unwanted high frequency jittering motion.
The depth of the scene and the instability in the imager's mount, dependant on the mount's weight, inertia, balance, combine to create undesired jittery global motion.
DIS methods may employ a global thr...

Method used

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  • Digital image stabilization device and method
  • Digital image stabilization device and method
  • Digital image stabilization device and method

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Embodiment Construction

[0039]FIGS. 1A through 1F are views of a current frame and a reference frames, and selected Feature Points and motion vectors thereof, for illustrating the steps in a method of Digital Image Stabilization in accordance with an exemplary embodiment of the inventive concept.

[0040]FIG. 1A shows two consecutive video frames, a current frame Ft and a reference frame Ft+1, of a scene. The scene includes stationary objects, e.g., hills in the foreground, a pole, and mountains, and the sun, and a moving object, e.g., a bird in the top left. The current frame Ft and the reference frame Ft+1 are portions of respective consecutive captured frames having a larger area (as shown in FIG. 1E). The larger captured frames are the raw images captured by an image sensor, before Digital Image Stabilization (DIS). The reference frame Ft+1 is rotated and translated relative to current frame Ft, due to a camera trajectory caused by jittery motion. The dimensions of the captured frame (see FIG. 1E) is typi...

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Abstract

A method of Digital Image Stabilization (DIS) including a feature point sorting algorithm for selecting optimal feature points, and a computationally efficient tile-vector based Hierarchical Block-Matching search algorithm for deriving motion vectors of the selected feature points, and a feature point motion vector grouping/comparison algorithm for grouping the selected feature points based on magnitude ratio criteria and angle difference criteria.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority under 35 U.S.C. §120 to U.S. Provisional Application No. 61 / 426,970, and 61 / 426,975, both filed in the U.S. Patent and Trademark Office on Dec. 23, 2010. The disclosures of both provisional applications are incorporated by reference herein.TECHNICAL FIELD[0002]The present inventive concept herein relates to digital image-stabilization (DIS), and more particularly, to a method of detecting, selecting and grouping feature points for digital image stabilization.DISCUSSION OF THE ART[0003]Digital cameras, digital video cameras and hand-held devices including such cameras capture are often employed to capture images or video while the camera is operated in the hand of a human operator. Thus, the video camera may be shaking or jittering in the operators hand while capturing the image or video. The jitter may include a horizontal component, a vertical component, and a rotational component. The rotation may be abou...

Claims

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Application Information

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IPC IPC(8): H04N5/225
CPCH04N5/145H04N5/23254G06T7/2026G06T7/2033G06F12/0891G06T2207/10016G06T2207/20016G06T2207/20021G06T1/20G06T7/2073G06T7/238G06T7/246G06T7/207H04N23/6811
Inventor BRAUN, MATTHIASPARK, SUNGSOO
Owner SAMSUNG ELECTRONICS CO LTD
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