%用下面這段程序更新視頻背景，為什么顯示的圖像是倒著的?。浚?？有matlab高手進來指點下啊。。。
%背景減除法，平均值法？
function?x?=?MovingDetect
%初始化背景所需要的幀數
N=30;
%背景更新參數
p1?=?95;
p2?=?100-p1;
M_?=?1;
%讀取AVI視頻文件
mov?=?aviread（‘C:\Users\yanghong\Desktop\1.avi‘）;
%獲取視頻幀數
dimension?=?size（mov）;
frameQTY?=?dimension（2）;
M=mov;
tmFr?=?rgb2gray（frame2im（mov（1）））;
s?=?size（tmFr）;
%%%%%%%%%%遍歷視頻幀，轉換為灰度圖
%%%%%%%%%%%for?i?=?1?:?frameQTY
%%%%%%%%%%%???????img=frame2im（mov（i））;
%%%%%%%%%%%???????img=rgb2gray（img）;
%%%%%%%%%%%%???????M（i）=im2frame（img?gray（256））;
%%%%%%%%%%%%%end
scrsz?=?get（0‘ScreenSize‘）;
%%%%%%%%%%%%%逐幀播放視頻
h1?=?figure（‘position‘?[scrsz（4）/2scrsz（4）/2s（2）*2s（1）*2]）;
%%%%%%%%%%%%%h2?=?figure;
%%%%%%%%%%%%%%imshow（?M（1）.cdata?）;
%%%%%%%%%%%%%%paintByMouse（?h1?）;
cdataSum?=?int16（zeros（s））;%平均值為0，16位數值
sedisk?=?strel（‘rectangle‘[22]）;%創建一個矩形窗口
sedisk2?=?strel（‘rectangle‘[32]）;%創建一個矩形窗口
count?=?zeros（s）;%s均值為0賦給count
for?c1?=?1:frameQTY;
colorFrC?=?M（c1）;%獲取第i幀
frC?=?rgb2gray（frame2im（colorFrC））;
frC?=?im2frame（frC?gray（256））;
f?=?int16（frC.cdata）;%數值f
if（?c1<=?N）
%前N幀用于背景建模
%%%%%%%%%%%%%%%movie（h2?frC?1?15）;%播放第i幀
%movie（h1?frC?1?15?[0s（1）00]）;%播放第i幀
cdataSum?=?cdataSum?+?f;%f是灰度變換后的圖像數據，
else
%開始運動檢測，首先計算出背景
if（c1==N+1）cdB?=?cdataSum/N;
else?cdB?=?int16（cdB）;%整數16位的
end
%%%%%%%%%%%%%%%cdB?=?uint8（cdataB）;
%運動檢測
%%%%%%%%%%%%%%????????for?i?=?1?:?240
%%%%%%%%%%%%%%????????????for?j?=?1?:?320
%%%%%%%%%%%%%%????????????????if（?（f（ij）?-?cdB（ij））>30?|?（cdB（ij）-f（ij））>30?）
%%%%%%%%%%%%%%????????????????????f（ij）?=?255;?????
%%%%%%%%%%%%%%????????????????else?
%%%%%%%%%%%%%%????????????????????f（ij）=?0;%0=black??????
%????????????????????%背景更新
%%%%%%%%%%%%%%????????????????????cdB（i?j）?=?（9*cdB（i?j）?+?f（i?j））/10;
???????????????????????????????%????????????????end
%%%%%%%%%%%%%%????????????end
%%%%%%%%%%%%%%????????end
%%%%%%%%%%%%