function?[PY2PY1PX2PX1]=caitu_fenge（I）
[yxz]=size（I）;%size（）函數讀取圖片數組大小，XY表示像素坐標，z表示?RGB三原色的數據
myI=double（I）;%double（）函數：轉換到double的精度
Y_threshlow=5;%這個數值很重要。決定了提取的彩圖的質量
X_firrectify=5;%ganrao?transaction
%======================?Y?方向============================
Blue_y=zeros（y1）;%zeros（）函數：創建一個y*1大小的數組并且賦值為0。
for?i=1:y???????????%循環統計第y數列的藍色像素點數
????for?j=1:x???
????????if（（myI（ij1）<=48）&&（（myI（ij2）<=100）&&（myI（ij2）>=40））&&（（myI（ij3）<=200）&&（myI（ij3）>=80）））?
????????????%判斷RGB數據是否符合藍色范圍?1表示R，2表示G，3為B
???????????Blue_y（i1）=?Blue_y（i1）+1;?????%?藍色象素點統計????????????????????
????????end??
????end???????
end
baisebili=0;changkuanbi=0;
k=0;
while（~（（baisebili>=0.10）&&（baisebili<=0.5）&&（changkuanbi>=0.20）&&（changkuanbi<=0.6）））%gai?shan?qingxie
????if??（k==0）%第一次進來
????????[temp?MaxY]=max（Blue_y）;%?Y方向車牌區域確定?temp（最多點數）:所有行中，最多的累積像素點?MaxY（最多點所在行）:該行中藍點最多
????????if?temp<=20%2048*1536??照相
???????????msgbox（‘車牌定位出錯‘‘warning‘）;%創建GUI界面提示車牌定位
????????????sound（audioread（‘車牌定位出錯.wav‘）22000）;
???????????pause;
????????end
????????PY1=MaxY;%有最多藍點的行付給PY1
????????while?（（Blue_y（PY11）>=Y_threshlow）&&（PY1>1））%找到圖片上邊界
????????????PY1=PY1-1;
????????end?
???????
????????%PY1：存儲車牌上邊界值
????????PY2=MaxY;
????????while?（（Blue_y（PY21）>=Y_threshlow）&&（PY2?????????????PY2=PY2+1;
????????end
????????PY1?PY2
?
%==============X?方向===============================
????????X_threshhigh=（PY2-PY1）/11;%這個數值很重要。決定了提取的彩圖的質量適當提高可抗干擾，但是小圖會照成剪裁太多
????????Blue_x=zeros（1x）;?????????????%?進一步確定X方向的車牌區域
????????for?j=1:x
????????????for?i=PY1:PY2
??????????????%??if（（myI（ij1）<=48）&&（（myI（ij2）<=90）&&（myI（ij2）>=30））&&（（myI（ij3）<=160）&&（myI（ij3）>=80）））??????
????????????????if（（myI（ij1）<=65）&&（（myI（ij2）<=100）&&（myI（ij2）>=40））&&（（myI（ij3）<=160）&&（myI（ij3）>=90）））%這里由82修改成90.因為圖片20090504809???
???????????????%??if?（（myI（ij1）<=0.7）&&（myI（ij1）>=0.6）&&（（myI（ij2）<=1.8）&&（myI（ij2）>=0.6））&&（（myI（ij3）<=1.7）&&（myI（ij3）>=0.45）））
?????????????????Blue_x（1j）=?Blue_x（1j）+1;???????????????
????????????????end??
????????????end???????
????????end
????????[temp?MaxX]=max（Blue_x）;
????????PX1=MaxX-6*（PY2-PY1）;
????????if??PX1<=1
????????????PX1=1;
????????end
????????while?（（Blue_x（1PX1）<=X_threshhigh）&&（PX1??????????????PX1=PX1+1;
????????end?%確定出X方向車牌起點???
????????PX2=MaxX+6*（PY2-PY1）;
????????if??PX2>=x
????????????PX2=x;
????????end
????????while?（（Blue_x（1PX2）<=X_threshhigh）&&（PX2>PX1））%閾值
???????????????PX2=PX2-1;
????????end%確定出X方向車牌終點
????????
%?????????PX1=1;
%?????????while?（（Blue_x（1PX1）<=X_threshhigh）&&（PX1%??????????????PX1=PX1+1;
%?????????end?%確定出X方向車牌起點???
%?????????PX2=x;
%?????????while?（（Blue_x（1PX2）PX1））%閾值
%?????????????PX2=PX2-1;
%????????end%確定出X方向車牌終點
????????PX1?PX2

%=========================================================???????
????????a=PY2-PY1+1;b=PX2-PX1+1;
????????White=0;
????????for?i=PY1:PY2
?????

?屬性????????????大小?????日期????時間???名稱
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?????文件??????34710??2009-05-03?06:30??1213\0.BMP

?????文件??????53738??2009-05-03?06:32??1213\0.WAV

?????文件??????18630??2009-05-03?06:31??1213\1.BMP

?????文件??????59458??2009-05-03?06:32??1213\1.WAV

?????文件??????47574??2009-05-03?06:30??1213\10.BMP

?????文件??????68934??2009-05-03?06:30??1213\11.BMP

?????文件??????39114??2009-05-03?06:30??1213\12.BMP

?????文件??????72762??2009-05-03?06:30??1213\13.BMP

?????文件??????33342??2009-05-03?06:30??1213\14.BMP

?????文件??????45198??2009-05-03?06:31??1213\15.BMP

?????文件??????41502??2009-05-03?06:31??1213\16.BMP

?????文件???????4278??2009-05-03?06:31??1213\17.BMP

?????文件???????3750??2009-05-03?06:31??1213\18.BMP

?????文件??????51574??2009-05-03?06:31??1213\19.BMP

?????文件??????19494??2009-05-03?06:31??1213\2.BMP

?????文件??????66058??2009-05-03?06:32??1213\2.WAV

?????文件??????47222??2009-05-03?06:31??1213\20.BMP

?????文件?????578967??2009-05-03?06:20??1213\20090423671.jpg

?????文件??????17254??2009-05-03?06:31??1213\21.BMP

?????文件???????4278??2009-05-03?06:31??1213\22.BMP

?????文件??????53198??2009-05-03?06:31??1213\23.BMP

?????文件??????48366??2009-05-03?06:31??1213\24.BMP

?????文件???????4278??2009-05-03?06:31??1213\25.BMP

?????文件??????78018??2009-05-03?06:31??1213\26.BMP

?????文件??????44390??2009-05-03?06:31??1213\27.BMP

?????文件???????4278??2009-05-03?06:31??1213\28.BMP

?????文件???????4806??2009-05-03?06:31??1213\29.BMP

?????文件??????18534??2009-05-03?06:31??1213\3.BMP

?????文件??????58138??2009-05-03?06:32??1213\3.WAV

?????文件???????4806??2009-05-03?06:31??1213\30.BMP

............此處省略97個文件信息