%0 Journal Article
%T A robust method of calculating point spread function from knife-edge without angular constraint in remote sensing images<br>不受刀刃边缘倾角约束的遥感影像点扩散函数稳健计算方法
%A QIN Rongjun
%A GONG Jianya
%A <br>秦荣君
%A 龚健雅
%J 遥感学报
%D 2011
%I 
%X The traditional knife-edge method has the limitation that the chosen edge must be approximately perpendicular or parallel to the sampling direction (ideal edge), which leads to diffi culties of choosing usable knife-edge. Focusing on the issue, a new model of calculating PSF based on knife-edges with any slant angles is proposed in this paper. The proposed method is not only equivalent to the traditional one with the ideal edge, but also better than the traditional method with a slant edge in the PSNR (Peak Signal to Noise Ratio), MSE (Mean Square Error) and SNR (Signal to Noise Ratio) of the restored image by the extracted PSF. The proposed method is robust to extract PSFs from knife-edges of any slant angles for image restoration, which extends its application. The validity of the proposed method has been reasoned both theoretically and practically, and tested with simulated data and ADS40 data.
%K PSF
%K Levenberg-marquardt
%K knife-edge method
%K Wiener fi lter<br>PSF
%K Levenberg-Marquardt
%K 刀刃法
%K 维纳滤波器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=3D120F67FFBE1E37881999840DB829F0&yid=9377ED8094509821&vid=23CCDDCD68FFCC2F&iid=94C357A881DFC066&sid=2DEC3FE1EFC628C2&eid=3382A18868551611&journal_id=1007-4619&journal_name=遥感学报&referenced_num=0&reference_num=15