Digital Image Stabilization for Detection and Elimination of Translational and Rotational Fluctuations
Date Issued
2005
Date
2005
Author(s)
Chiou, Pao-Sheng
DOI
en-US
Abstract
The task of image stabilization systems is to eliminate the image fluctuations caused by unwanted camera movement, while preserving only the intentional camera movement. A digital image stabilization system can be divided into two major parts: one is the motion estimation unit which aims at estimating the global motions of inter-frames and another one is the motion correction unit which aims at eliminating image fluctuations.
In this thesis, an algorithm of digital image stabilization which aims at handling both translational and rotational fluctuations is proposed. In order to improve the accuracy of global motion estimation, a concept based on searching the rotational center of a rigid camera motion is proposed and a modified 3-parameter affine motion model is derived. Then, information about the rotation angle, the rotational center and the translation vector can be obtained.
Subjects
數位式影像穩定
旋轉中心
仿射運動模型
Digital Image Stabilization
Rotational Center
Affine Motion Model
Type
thesis