摘要
针对船用航行数据记录仪雷达图像无损压缩问题,提出了将整数小波和改进SPECK相融合的算法.该算法利用整数小波对图像进行变换,进而采用引入了Hash表和综合匹配法的改进SPECK进行编码.雷达图像无损压缩仿真结果表明,该算法不仅提高压缩速度,而且提高了压缩比.
In view of the problem of lossless compression for VDR radar image, an algorithm combining the integer wavelet transform with improved SPECK is presented. With the algorithm, the image is first transformed by integer wavelet, then improved SPECK, in which synthetic matching and Hash table are brought, is used to code. The simulation of radar image lossless compression shows that both compression speed and rate are improved.
出处
《船舶工程》
CSCD
北大核心
2005年第2期20-23,共4页
Ship Engineering
关键词
图像处理
整数小波变换
SPECK
无损压缩
匹配
image processing
integer wavelet transform
SPECK
lossless compression
matching
