摘要
针对星载实时压缩的需要,设计了一种按块分频压缩算法。该算法以按块定长压缩为基础,用二级拟合(即双线性插值拟合及最小二乘法拟合)修正,与高频纹理特征修正相结合的方式恢复原图象信息,得到了四倍压缩比下,有限误码扩散及较好的图象保真效果。
To fit the requirements of air-borne real time satellite image data compression, a new method, block based frequency division encoding method, is designed. Features of the method are fixed compression ratio for each block, compound image data recovering consists of bilinear data interpolation, least square and high frenquency texture data correction. The characteristics of the method are compression ratio 4, bounded channel error spreading and good vision quality of the recovered image.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1993年第4期129-135,共7页
Journal of Beijing University of Aeronautics and Astronautics
关键词
卫星
分频压缩
遥感图象
实时处理
information compression, remote image, real-time processing.
