提高电子稳像灰度投影算法运算速度的研究

采用灰度投影算法检测图像序列的帧间运动矢量,具有图像信息利用充分、算法稳定性好等优点。但以往使用全局搜索算法寻找最佳匹配点,运算量大、耗时长。通过对灰度投影算法相关曲线的分析,利用其具有单峰性的特点,提出了三点局域自适应搜索算法。该算法与全局搜索算法相比,运算量小、耗时少。仿真实验验证了该算法的速度和性能。

Research on Raising The Calculation Speed of Gradation Projection Algorithm of Electronic Image Stabilization

Adopting the gradation projection algorithm to detect the inter-frames motion vector of image sequence has many advantages,such as sufficingly using the image information and good algorithm stability. But in the past, the full search algorithm is used to look for the best matching point ,and spends much time and the calculation quantity is great. Through analyzing the correlation curve of the gradation projection algorithm and taking the advantage of the feature that the correlation curve has single peak, this paper proposes three-point local self-adaptive search algorithm. Compared with the full search algorithm,this algorithm has the advantage of small calculation quantity and less dissipative time. The simulation experiments validate the speed and the performance of the algorithm.