基于行灰度投影相关的快速角度矢量估计算法

针对现存电子稳像算法估计图像旋转角度矢量的不足，提出了一种基于行灰度投影相关的快速图像旋转角度矢量估计算法。通过在当前帧图像中心位置选取灰度投影区域和参考帧图像相应区域作行灰度投影相关计算，估算出当前帧图像相对于参考帧图像的角度运动矢量。论述了灰度投影区域选取原则；分析了行、列灰度投影相关曲线的差异，得出行灰度投影相关曲线具有单峰性的结论；阐述了快速搜索算法的原理及其在本算法中的应用。实验表明，算法实现了对旋转图像序列角度运动矢量的快速估计（在PⅣ2.67GHZ，内存512M的PC机上，估算速度为37.7ms），可对任意角度的角度矢量进行高精度的估计。

Fast Angle Vector Computation Algorithm Based on Row Gray Projection Correlation for Rotation Image

As current electronic image stabilization algorithms are weak in angle vector computation for rotation images,a fast angle vector computation algorithm based on row gray projection correlation was presented. By selecting reference frames areas and correlating their row gray projection areas in the center areas of current frames,angle vector between frames was computed. The principle of selecting projection and rotation areas was discussed. Through analyzing the correlation curves between row gray projection...