一种基于小波变换的遥测图像编码新方法

A new encoding method of telemetry image based on wavelet transform

为了实现火箭遥测图像的高效处理,优化火箭遥测图像的编码流程,提出了一种基于小波变换的火箭遥测图像编码新方法。在图像小波变换的基础上,以空间方向树为编码单位,采用改进的分层树集合分割(SPIHT)算法实现图像重要小波系数的比特平面编码,并采用联合码率优化截取方法,优先截取和传输重要比特平面的遥测图像数据。通过系统测试,结果表明:与传统的火箭遥测图像编码方法相比,新的遥测图像编码方法具有丢帧率低、重构图像质量好、编码效率高等优点,满足运载火箭遥测图像处理和传输的工程需求。

In order to realize the efficient disposal of rocket telemetry image and optimize its encoding process,a new encoding method of rocket telemetry image based on wavelet transform is put forward.On the basis of image wavelet transform,the modified Set Partitioning In Hierarchical Tree(SPIHT)algorithm is adopted to realize the bit flat encoding of important wavelet coefficient in the image by the encoding unit of space direction tree,the optimized interception method of united code rate preferentially cuts out and transmits the important bit flat data of telemetry image.Through the system testing,the results demonstrate that compared with the traditional encoding method of rocket telemetry image,the new encoding method has the advantage of low frame-drop-ratio,good quality of reconstructed image,and efficient encoding,etc,which can meet the engineering requirements of the disposal and transmission of rocket telemetry image.