clear?all??
alpha?=?0.05;?%背景建模alpha值??
std_init?=?20;?%初始化標準差??
var_init?=??std_init?*?std_init?;?%初始化方差??
lamda?=?2.5?*?1.2?;?%背景更新參數??
??
fileName?=?‘D:\\mc\\b.avi‘;???
obj?=?VideoReader（fileName）;??
numframes?=?obj.NumberOfframes;??
frame?=?read（obj1）;??
%第一幀圖像單獨取出來作為初始化用。??
%================??
%fram原始圖像??
%frame_u期望圖像??
%frame_d前景圖像??
%fram_var方差圖像??
%fram_std標準差??
%================??
%pixel像素原始值??
%pixel_u像素期望??
%pixel_d像素前景??
%pixel_var像素方差??
%pixel_std像素標準差??
[f_heightf_weight]?=?size（frame）;?%提取第一幀圖像的高度和寬度??
f_weight?=?f_weight/3;%彩色圖像RGB，所以需要除以三??
??
%初始化??
for?i=1:f_height??
????for?j=1:f_weight??
????????pixel_r?=?frame（ij1）;%frame為一幀圖像，1代表R的值??
????????pixel_g?=?frame（ij2）;??
????????pixel_b?=?frame（ij3）;??
??????????
????????pixel_ur?=?pixel_r;??
????????pixel_ug?=?pixel_g;??
????????pixel_ub?=?pixel_b;%期望圖像為原圖背景??
??????????
????????pixel_dr?=?0;??
????????pixel_dg?=?0;??
????????pixel_db?=?0;%前景圖像初始化為0??
??????????
????????pixel_stdr?=?std_init;??
????????pixel_stdg?=?std_init;??
????????pixel_stdb?=?std_init;%標準差??
?????????
????????pixel_varr?=?var_init;??
????????pixel_varg?=?var_init;??
????????pixel_varb?=?var_init;%方差??
??????????
????????frame_u（ij1:3）?=?[pixel_ur?pixel_ug?pixel_ub];??
????????frame_d（ij1:3）?=?[pixel_dr?pixel_dg?pixel_db];??
????????fram_std（ij1:3）?=?[pixel_stdr?pixel_stdg?pixel_stdb];??
????????frame_var（ij1:3）?=?[pixel_varr?pixel_varg?pixel_varb];???????
????end??
end??
??
%a?=?input（‘please?assign?a?value?for?a‘）;??
%while（?a?~=?27）??
%????fprintf（‘i?like?you‘）;??
%end??
??
%單高斯背景更新??
?for?k?=?1?:?numframes?%?讀取數據??
?????frame?=?read（objk）;??
?????for?i=1:f_height???
?????????for?j=1:f_weight??
??????????????pixel_r?=?frame（ij1）;%frame為一幀圖像，1代表R的值??
??????????????pixel_g?=?frame（ij2）;??
??????????????pixel_b?=?frame（ij3）;??
????????????????
??????????????pixel_ur?=?frame_u（ij1）;??
??????????????pixel_ug?=?frame_u（ij2）;??
??????????????pixel_ub?=?frame_u（ij3）;%期望圖像（背景）初始化為第一幀圖??
????????????????
??????????????pixel_dr?=??frame_d（ij1）;??
??????????????pixel_dg?=??frame_d（ij2）;??
??????????????pixel_db?=??frame_d（ij3）;%前景圖像，初始為0??
????????????????
??????????????pixel_stdr?=??fram_std（ij1）;??
??