function?facedetection（img_name）??
%?讀取RGB圖像??
I?=?imread（img_name）;??
%?轉換為灰度圖像??
gray?=?rgb2gray（I）;??
%?將圖像轉化為YCbCr顏色空間??
YCbCr?=?rgb2ycbcr（I）;??
%?獲得圖像寬度和高度??
heigth?=?size（gray1）;??
width?=?size（gray2）;??
%?根據膚色模型將圖像二值化??
for?i?=?1:heigth??
????for?j?=?1:width??
????????Y?=?YCbCr（ij1）;??
????????Cb?=?YCbCr（ij2）;??
????????Cr?=?YCbCr（ij3）;??
????????if（Y?????????????gray（ij）?=?0;??
????????else??
????????????if（skin（YCbCr）?==?1）??
????????????????gray（ij）?=?255;??
????????????else??
????????????????gray（ij）?=?0;??
????????????end??
????????end??
????end??
end??
%?二值圖像形態學處理??
SE=strel（‘arbitrary‘eye（5））;????
%gray?=?bwmorph（gray‘erode‘）;??
%?imopen先腐蝕再膨脹??
gray?=?imopen（graySE）;??
%?imclose先膨脹再腐蝕??
%gray?=?imclose（graySE）;??
imshow（gray）;??
%?取出圖片中所有包含白色區域的最小矩形??
[Lnum]?=?bwlabel（gray8）;??
STATS?=?regionprops（L‘BoundingBox‘）;??
%?存放經過篩選以后得到的所有矩形塊??
n?=?1;??
result?=?zeros（n4）;??
figureimshow（I）;??
hold?on;??
for?i?=?1:num??
????box?=?STATS（i）.BoundingBox;??
????x?=?box（1）;????%矩形坐標x??
????y?=?box（2）;????%矩形坐標y??
????w?=?box（3）;????%矩形寬度w??
????h?=?box（4）;????%矩形高度h??
????%?寬度和高度的比例??
????ratio?=?h/w;??
????ux?=?uint8（x）;??
????uy?=?uint8（y）;??
????if?ux?>?1??
????????ux?=?ux?-?1;??
????end??
????if?uy?>?1??
????????uy?=?uy?-?1;??
????end??
????%?可能是人臉區域的矩形應滿足以下條件：??
????%???1、高度和寬度必須都大于20，且矩形面積大于400??
????%???2、高度和寬度比率應該在范圍（0.62）內??
????%???3、函數findeye返回值為1??
????if?w?????????continue??
????elseif?ratio??0.6?&&?findeye（grayuxuywh）?==?1??
????????%?記錄可能為人臉的矩形區域??
????????result（n:）?=?[ux?uy?w?h];??
????????n?=?n+1;??
????end??
end??
%?對可能是人臉的區域進行標記??
if??size（result1）?==?1?&&?result（11）?>?0??
????rectangle（‘Position‘[result（11）result（12）result（13）result（14）]‘EdgeColor‘‘r‘）;??
else??
????%?如果滿足條件的矩形區域大于1則再根據其他信息進行篩選??
????for?m?=?1:size（result1）??
????????m1?=?result（m1）;??
????????m2?=?result（m2）;??
????????m3?=?result（m3）;??
????????m4?=?result（m4）;??
????????%?標記最終的人臉區域??
????????if?m1?+?m3?????????????rectangle（‘Position‘[m1m2m3m4]‘EdgeColor‘‘r‘）;??
????????end??
????end??
end???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????43878??2017-07-20?14:20??22.bmp
?????文件????????2478??2017-07-20?14:10??facedetection.m
?????文件?????????723??2017-07-20?14:10??findeye.m
?????文件?????????327??2017-07-20?14:11??main.m
?????文件?????????687??2017-07-20?14:09??skin.m
?????文件??????175350??2017-07-20?14:30??11.bmp