%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%修改權值
%%變量結果：ht????????????????????????????????????????????弱分離器的判決結果
%%????????Zt??????????????????????????????????????歸一化參數
%%????????W???????????????????????????????????????權值結果
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%



function?[WhtalphZt]?=?changeweight（BClassifierdatalocatWnum）


alph?=?log（（1-BClassifier.error）/BClassifier.error）/2;
feature?=?extract_features（datalocatnum）;
sample_num?=?length（data.labels）;
Zt?=?0;
threshold_matrix?=?zeros（1length（data.images））;?
threshold_matrix（::）?=?BClassifier.threshold;
if?BClassifier.Ori?==?1
???
????ht?=?（feature?>=?threshold_matrix）;
????ht?=?ht?+?ht?-?1;
else
????ht?=?（feature?<=?threshold_matrix）;
????ht?=?ht?+?ht?-?1;
end
for?i?=?1?:?sample_num
????Zt=W（i）*exp（-alph*data.labels（i）*ht（i））+Zt;
end
for?i?=?1?:?sample_num
????W（i）?=?W（i）*exp（-alph*data.labels（i）*ht（i））/Zt;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1021??2010-04-16?16:47??adaboost\changeweight.m

?????文件???????2164??2010-04-16?16:36??adaboost\extract_features.m

?????文件???????1750??2010-04-16?16:47??adaboost\judgment.m

?????文件????????292??2010-04-16?17:11??adaboost\manual.txt

?????文件???????3172??2010-04-16?16:34??adaboost\Preprocess.m

?????文件???????2576??2010-04-16?17:06??adaboost\Runme2.m

?????文件????????889??2010-04-10?15:10??adaboost\threshold.m

?????文件???????3116??2010-08-07?14:13??adaboost\Preprocess.asv

?????目錄??????????0??2012-11-05?21:27??adaboost

-----------?---------??----------?-----??----

????????????????14980????????????????????9