摘要
本文给出X射线编码孔三维成象的一种新的解码技术——频域梳状滤波法,指出相关法解码所获得的重现光场中,观察层上的有效信号与重叠噪声的不同特征,在一定条件下可使其视频信号的频谱特征不同.理论上预计,通过梳状滤波可得到约等于1/m(m为编孔点阵的点数)的重叠噪声抑制比.该方法改进了至今国内外最常用的相关解码技术.能有效地抑制相关解码技术所不能解决的重叠噪声.
A new method was given in this paper , which can reduce the reduplicate noise of three-dimemsional X-ray tomography. It was compared with the others, also theoretical and experimental studies of the noise reducing of three-dimension X-ray coded imaging are presented. By using comb function filter in frequency spectrum,the author gave the decodedi-nage of three-dimension tomography. Theoretical analyse appears that the quenlity of decoded image by using this decode method is better than the other ones. The noice emgryis reduced to about 1/m(m is the number of coded subimage).
出处
《首都师范大学学报（自然科学版）》
1997年第1期34-40,共7页
Journal of Capital Normal University：Natural Science Edition
基金
国家自然科学基金资助项目
