%0 Journal Article
%T Estimating the Standard Deviation of Noise via Controlled Function<br>基于控制函数估计图像噪音的标准方差
%A WANG Wen-yuan
%A <br>王文远
%J 计算机科学
%D 2009
%I 
%X This paper presented a new algorithm to estimate the standard deviation of noise for nature images.It uses a gradient filter to estimate the noise on some parts which are selected by a controlled function from the tessellating ima-ge.The controlled function can be related to the preestimate of SNR.We optimally determined the controlled function as an exponential function by minimizing the total error.The controlled function can effectively offset the effect which is caused by filtering the image structure.T...
%K Standard deviation
%K Tessellating
%K Controlled function
%K Preestimate of SNR<br>标准方差
%K 网格化
%K 控制函数
%K 预信噪比
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=5F8D2BFC0D66BF809F3B3EFDD973F187&yid=DE12191FBD62783C&vid=933658645952ED9F&iid=9CF7A0430CBB2DFD&sid=211C7E02AC474301&eid=2AC7DCCBBC26ECF8&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=16