预测扫描提前跳转的电子稳像方法

提出一种基于传感器电子稳像技术的扫描稳像方法———预测扫描提前跳转法,用以处理电子稳像过程中摄像系统的扫描运动问题。首先,利用传感器敏感摄像系统运动,实现对图像序列帧间偏移量的估计,并根据估计偏移量预测图像序列是否存在扫描运动;然后,对存在扫描运动的图像将参考帧提前跳转到扫描后位置,再运用稳像算法进行处理。该方法通过提前跳转参考帧将扫描模式下的稳像过程简化为不存在扫描运动的稳像过程,简化了扫描稳像的数学模型,降低了算法复杂度,同时通过跳转步长的设置和缓存参考帧技术进一步提高了算法的准确度和可靠性。实验结果表明,该方法可在输出稳定图像的同时正确显示视频序列的扫描运动。

Scanning image stabilizing algorithm: Predicting scanning motion and jumping in advance

A novel scanning image stabilizing algorithm,predicting scanning motion and jumping in advance,is proposed based on sensor electronic image stabilization to process active scanning and passive scanning problems in a camera system. Firstly, it uses a gyro to detect the motion situation of the camera system and estimate the offset of image sequences. Then,it judges whether the scanning motion is in the camera system based on the estimated offsets. If the scanning motion exists, the reference frame will be converted into the predicting frame which is a image after scanning. Finally, the electronic image stabilization is used to process the motion vectors of image sequences. The algorithm is different from traditional image stabilizing algorithm. It transforms the image stabilization from scanning model to un-scanning model, so it greatly simplifies the image stabilizing process and reduces the complexity of algorithm. Furthermore,the proper step size and cache reference frame improve the accuracy and reliability of the algorithm. The experimental result shows that the algorithm can output stable images, meanwhile can display the scanning motions of image sequences correctly.