红外技术, 2016, 38 (2): 0163, 网络出版: 2016-04-05
电子稳像中的参考帧选择策略
The Reference Frame Selection Strategy in Electronic Image Stabilization
全局运动估计 参考帧选取 累积变换参数 累积误差 global motion estimation reference frame selection cumulative transformation parameter cumulative error
摘要
在电子稳像中合理的选择参考帧是全局运动估计和运动补偿的基础。为了解决传统参考帧选择策略带来的帧间跳变的缺陷,给出一种基于累积变换的参考帧更新策略,通过相邻帧间运动参数的累积变换得到当前帧相对于第一帧的累积全局运动参数,统一了补偿基准,并针对过程中产生的累积误差问题,通过设定匹配阈值调整参考帧更换条件,减少参数的传递次数。实验结果表明,改进算法能够有效解决帧间跳变问题,缓解误差的累积进程,输出平稳的结果视频。
Abstract
Reasonable selection of reference frames in the electronic image stabilization is the basis of global motion estimation and motion compensation. In order to solve the problem of frame jump caused by the traditional reference frame selection strategy, a reference frame update strategy based on the cumulative transformation is presented in this paper. By the cumulative transformation of the adjacent frames, the cumulative global motion parameter of the current frame with respect to the first frame is obtained, and the compensation standard is unified. Aiming at the problem of cumulative error in the process, the change of the reference frame is adjusted by setting the matching threshold, and the number of parameters is reduced. The experimental results show that this improved algorithm can effectively solve the problem of inter frame jump, alleviate the error accumulation process, and output a smooth video.
黄文娟, 王敬东, 薛重飞, 王崟. 电子稳像中的参考帧选择策略[J]. 红外技术, 2016, 38(2): 0163. HUANG Wenjuan, WANG Jingdong, XUE Chongfei, WANG Yin. The Reference Frame Selection Strategy in Electronic Image Stabilization[J]. Infrared Technology, 2016, 38(2): 0163.