【摘要】 不规则的旋转运动会明显降低图像序列的质量,旋转运动估计是实现图像稳定的关键技术.提出了采用仿射变换来估计图像旋转运动的方法.利用全分布的匹配块进行仿射变换可以获得较好的运动估计效果,不过运算量过于巨大.分析图像分布特性,提出采用十字分布的匹配块参与仿射模型的变换;只使用呈十字分布的外围4个匹配块进行运算,获得了与全分布法相近的结果.仿真试验结果表明提出的算法不仅能很好的估计并补偿旋转运动,运算量仅为全分布法的1/6.更多还原

【Abstract】 Irregular rotational motion degrades the image sequences,and the rotational motion estimation is the key of the electronic image stabilization.The method of the rotational motion estimation based on vertical arranged affine model is proposed.Though the motion estimation based on full arranged affine model is accurate enough,the computation load is too heavy.After the analyzing of the images feature,a vertical arranged affine model is proposed.Furthermore,the accuracy of the estimation with only the outer four matching blocks is similar to that of 24 blocks.Simulation results show that not only the performance is good,but also the computation is 1/6 of the full arrangement.更多还原