基于视频的投弃式温深仪速度测量技术研究

投弃式温深仪(XBT)的下降速率公式对XBT所测量的海水温度剖面有很大影响,通过分析视频测量系统所拍摄的XBT探头下落过程中的序列图像可计算其下落过程中的位姿参数并改进其下降速率公式.为测量XBT探头的下落速度,提出了一种基于积分投影和Radon变换的速度测量新方法.该方法无需复杂的图像处理算法及测量数据后处理算法,只需计算各帧图像的水平积分投影合成时间堆栈图像,根据时间堆栈图像的物理意义来确定目标运动轨迹的时空关系.通过对时间堆栈图像做Radon变换处理检测直线边缘特征,计算出目标的运动速度.实验表明,该方法简单、可靠,在图像质量较差的情况下仍能有效地计算出目标的运动速度.

Research on XBT velocity measurement method based on video

The Fall rate equation of XBT has a great influence on the ocean temperature profile measured by XBT.By analyzing the image sequences of XBT falling in water,its moving parameters can be calculated and its FRE can be improved.In order to measure XBT probe's velocity,a novel velocity measurement method based on integration projection and Radon transform is proposed.This method doesnt depend on complex image processing and data post-processing algorithms.By calculating image sequences' horizontal integral projecting,a new image is achieved by using time stack method and the space-time relationship between target ~ tracking is determined.By using Radon transform to deal with time-stack image,the velocity parameter is estimated.The experiments show that the method proposed can calculate moving target's velocity using low-quality images.This method is simple and reliable,has a good value for application.