function?rms=rms（baseresult）
%?%?計算均方根誤差:含噪圖像每個象素點與原始圖像間誤差的平方和的均值的平方根
%?%計算結果，rms等于去噪后的噪聲標準差
%?%?Calculate?RMS?error?between?result?and?original
%?%?Idiff?=?imsubtract（baseresult）;?%?get?error?values
%?%?Idbl?=?double（Idiff）;?%?convert?to?double?for?arithmetic
%?d_idbl=block_im（Idbl8）;
%?for?i=1:8
%?????for?j=1:8
%?????????Isqrd{ij}?=?d_idbl{ij}.^2;?%?square?each?pixel
%?????end?
%?end
%?%?u?=?mean（mean（imout））;?%?get?mean?of?squared?errors
%?for?i=1:8
%?????for?j=1:8?
%?????????u（ij）?=?