计算机科学 ›› 2016, Vol. 43 ›› Issue (8): 313-317.doi: 10.11896/j.issn.1002-137X.2016.08.064
易盟,楚岩
YI Meng and CHU Yan
摘要: 考虑到航拍机载成像平台抖动严重、视频稳像匹配环节精度不一致的特点以及航拍图像稳像技术快速、准确的要求,提出了一种结合仿射不变约束与快速扩展卡尔曼(Extend Kalman Filter,EKF)滤波的图像稳像算法。该算法首先以视频参考帧中的角点量作为特征点,通过Harris检测器选择出稳定角点;然后对待配准点构建Delaunay三角网进行初始匹配,提出利用仿射不变约束方法筛选出精确匹配点;最后利用快速EKF运动滤波方法实时估计和修正噪声的统计特性,从而解决摄像机扫描运动中存在的抖动问题。在对大量分辨率为640×480pixel的航拍图像的仿真实验中,可通过仿射不变约束实现精确的模型估计,采用的快速运动补偿方法在补偿过程中耗时为5.054ms,比传统的运动补偿方法节约了69.5%的时间。实验结果表明,该算法能够实时稳定航拍视频帧间的抖动现象,并能有效跟随场景的真实扫描。
[1] Ratakonda K.Real-time digital video stabilization for multi-media applications[C]∥IEEE International Symposium on Circuits and Systems.1998:69-72 [2] Aysun A,Ertfürk S.Fast digital image stabilization using one bit transform based sub-image motion estimation[J].IEEE Tran-sactions on Consumer Electronics,2005,1(3):917-921 [3] Byrne J.Nested motion descriptors[C]∥2015 IEEE Conference on Computer Vision and Pattern Recogniton(CVPR).2015:502-510 [4] Yeong K,Chulwoo L,Chang K.Video stabilization based onfeauture trajectory augmentation and selection and robust mesh grid warping[J].IEEE Transactions on Image Processing,2015,24(12):5260-5273 [5] Chen Y,Lin H.Full-frame video stabilization via SIFT feature matching[C]∥2014 Tenth International Conference on Intelligent Information Hiding and Multimedia Signal Processing.2014:361-364 [6] Sung K,Lee S,Seung J.Fast digital image stabilizer based ongray-coded bit-plane matching[J].IEEE Transactions on Consumer Electronics,2009,5(3):598-603 [7] Shih Y Y,Su S F,Rudas I.Fuzzy based hand-shake compensation for image stabilization[C]∥2012 International Conference on System Science and Engineering.2012:1511-1521 [8] Jiang J G,Niu J J,Qi M B.Rotational video stablization algorithm based on SURF and trajectory smothing[J].Chinese Journal of Scientific Instrument,2014,4(13):743-748(in Chinese) 蒋建国,牛杰杰,齐美彬.基于SURF和轨迹滤波的旋转视频稳像算法[J].仪器仪表学报,2014,24(13):743-748 [9] Zhu J,Guo B.Electronic image stabilization system based on global feature tracking[J].Journal of Systems Engineering and Electronics,2008,9(2):228-233 [10] Dong K,Hong R.New image quality metric using the Harris response[J].IEEE Signal Processing Letters,2009,6(7):616-619 [11] Ming Z.A robust Delaunay triangulation matching for multispectral/multidate remote sensing image registration[J].IEEE Geoscience and Romote Sensing Letters,2015,2(4):711-715 [12] Hongsheng L.Object matching using a locally affine invariant and linear programming techniques.[J] IEEE Transactions on Pattern Analysis & Machine Intelligence,2013,5(2):411-424 [13] Houtekamer P,Herschel L.Ensemble kalman filtering[J].Quar-terly Journal of the Royal Meteorological Society,2006,131(613):3269-3289 [14] Lynn R,Alireza M K.Robust adaptive Kalman Filtering for systems with unknown step inputs and non-Gaussian measurement errors [J].IEEE Transactions on Acoustrics,1986,34(2):252-263 [15] Xu J S,Qin Y Y,Peng R.Adaptive kalman filter fading factor selection method research [J].Journal of Systems Engineering and Electronics,2004,26(11):1152-1154(in Chinese) 徐景硕,秦永元,彭蓉.自适应卡尔曼滤波器渐消因子选取方法研究[J].系统工程与电子技术,2004,26(11):1152-1154 |
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