一种两阶段的视频图像关键帧提取方法

根据对航拍视频进行实时全景图拼接的实际需求，提出一种两阶段的关键帧提取方法。第一阶段利用飞行时间与重叠率的线性关系，以较高重叠率提取准关键帧，第二阶段对准关键帧进行逐帧检测，进一步降低冗余，最后确定关键帧，为全景图拼接做好准备。经实验检验．该方法能够提取出有效关键帧，具有可实用性。

A Two-Phase Video Image Key Frame Extraction Method

According to the actual need for panorama joint of aerial video in real time, puts forward a two- phase of the key frame extraction method. In the first stage, the candidate key frames are ex- tracted in high overlap ratio by using the linear relation between flight time and overlap rate. Then the second stage, final key frames are determined through checking the frame-to-frame overlap ratio to reduce redundancy, which prepared for panorama joint. After the experiment ex- amination, this method which can extract key frames, is practical.