【作者】 黄翔东； 李文元； 王兆华； 曾义方；

【Author】 HUANG Xiang-dong~1 Li Wen-yuan~1 WANG Zhao-hua~1 Zeng Yi-fang~2 (1.School of Electronics Information Engineering,Tianjin University Tianjin 300072;2.Beihang University,Beijing 100083 )

【机构】 天津大学电子信息工程学院； 北京航空航天大学；

【摘要】 二维带窗全相位Fourier滤波器具有通带起伏小,阻带衰减大,过渡带小等优良特点,并且滤波时可等效为一模板处理.为此,本文构造了真彩色静态图像传送与恢复处理的系统用以提供滤波所需的测试信号。在系统发送端,通过构造调制矩阵对U、V分量进行频谱搬移。在接收端采用了二维全相位带窗模板进行图像复原.实验证明:用全相位模板恢复的图像的PSNR相比于非重叠方法可提高5dB以上。更多还原

【Abstract】 2-D all-phase Fourier filter is characterized with slight passband’s undulation,big stopband’s attenuation and narrow transition zone.Moreover,it is also equivalent to a template when filtering.To provide the test signal to for this excellent filter,this paper constructs a framework which is fit to transfer and restore truecolor still images.On the transmitter of this system, one modulating matrix is constructed for U,V components’ spectrum displacement.On the receiver,2-D all-phase Fourier template is utilized to restore images.And experiment proves that the PSNR of restored image by all-phase template is above 5 dB higher than that by non-overlapping method.更多还原