function?rmse?=?compare（f1?f2?scale）%
error（nargchk（23nargin））;
if?nargin????scale?=?1;??????
end
e?=?double（f1）?-?double（f2）;
[m?n]?=?size（e）;
rmse?=?sqrt（sum（e（:）?.^?2）?/?（m?*?n））;
if?rmse
???emax?=?max（abs（e（:）））;
???[h?x]?=?hist（e（:）?emax）;
???if?length（h）?>=?1
??????figure;??
??????bar（x?h?‘k‘）;
??????emax?=?emax?/?scale;
??????e?=?mat2gray（e?[-emax?emax]）;
??????%mat2gray將矩陣e中的灰度值按照-emax到emax重新對應(yīng)到0~1的范圍內(nèi)，然后輸出一個(gè)新的灰度值的矩陣
??????figure;?
??????imshow（e[]）;
???end
end

?屬性????????????大小?????日期????時(shí)間???名稱
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?????文件????1642856??2011-12-07?10:30??JPEG（哈夫曼）無損壓縮\comp.bmp

?????文件????????551??2013-11-28?16:58??JPEG（哈夫曼）無損壓縮\compare.m

?????文件???????1222??2012-12-22?18:31??JPEG（哈夫曼）無損壓縮\huff2mat.m

?????文件???????1210??2012-12-22?18:31??JPEG（哈夫曼）無損壓縮\huffman.m

?????文件????????461??2012-12-22?18:32??JPEG（哈夫曼）無損壓縮\imratio.m

?????文件?????109340??2013-11-30?20:30??JPEG（哈夫曼）無損壓縮\jpeg壓縮?????（原圖）.jpg

?????文件?????109340??2013-11-30?20:31??JPEG（哈夫曼）無損壓縮\jpeg壓縮?????（重構(gòu)）.jpg

?????文件????????932??2013-11-28?23:33??JPEG（哈夫曼）無損壓縮\mat2huff.m

?????文件???????7168??2004-12-16?13:36??JPEG（哈夫曼）無損壓縮\unravel.dll

?????文件????????172??2013-12-01?13:33??JPEG（哈夫曼）無損壓縮\work.m

?????目錄??????????0??2013-11-30?22:02??JPEG（哈夫曼）無損壓縮

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??????????????1873252????????????????????11