1.色彩空间转换
function [r,g]=rgb_RGB(Ori_Face)
R=Ori_Face(:,:,1);
G=Ori_Face(:,:,2);
B=Ori_Face(:,:,3);
R1=im2double(R); % 将uint8型转换成double型G1=im2double(G);
B1=im2double(B);
RGB=R1+G1+B1;
row=size(Ori_Face,1); % 行像素
column=size(Ori_Face,2); % 列像素
for i=1:row
for j=1:column
rr(i,j)=R1(i,j)/RGB(i,j);
gg(i,j)=G1(i,j)/RGB(i,j);
end
end
rrr=mean(rr);
r=mean(rrr);
ggg=mean(gg);
g=mean(ggg);
2.均值和协方差
t1=imread('D:\matlab\皮肤库\1.jpg');[r1,g1]=rgb_RGB(t1); t2=imread('D:\matlab\皮肤库\2.jpg');[r2,g2]=rgb_RGB(t2); t3=imread('D:\matlab\皮肤库\3.jpg');[r3,g3]=rgb_RGB(t3); t4=imread('D:\matlab\皮肤库\4.jpg');[r4,g4]=rgb_RGB(t4); t5=imread('D:\matlab\皮肤库\5.jpg');[r5,g5]=rgb_RGB(t5); t6=imread('D:\matlab\皮肤库\6.jpg');[r6,g6]=rgb_RGB(t6); t7=imread('D:\matlab\皮肤库\7.jpg');[r7,g7]=rgb_RGB(t7); t8=imread('D:\matlab\皮肤库\8.jpg');[r8,g8]=rgb_RGB(t8);
t9=imread('D:\matlab\皮肤库\9.jpg');[r9,g9]=rgb_RGB(t9);
t10=imread('D:\matlab\皮肤库\10.jpg');[r10,g10]=rgb_RGB(t10);
t11=imread('D:\matlab\皮肤库\11.jpg');[r11,g11]=rgb_RGB(t11);
t12=imread('D:\matlab\皮肤库\12.jpg');[r12,g12]=rgb_RGB(t12);
t13=imread('D:\matlab\皮肤库\13.jpg');[r13,g13]=rgb_RGB(t13);
t14=imread('D:\matlab\皮肤库\14.jpg');[r14,g14]=rgb_RGB(t14);
t15=imread('D:\matlab\皮肤库\15.jpg');[r15,g15]=rgb_RGB(t15);
t16=imread('D:\matlab\皮肤库\16.jpg');[r16,g16]=rgb_RGB(t16);
t17=imread('D:\matlab\皮肤库\17.jpg');[r17,g17]=rgb_RGB(t17);
t18=imread('D:\matlab\皮肤库\18.jpg');[r18,g18]=rgb_RGB(t18);
t19=imread('D:\matlab\皮肤库\19.jpg');[r19,g19]=rgb_RGB(t19);
t20=imread('D:\matlab\皮肤库\20.jpg');[r20,g20]=rgb_RGB(t20);
t21=imread('D:\matlab\皮肤库\21.jpg');[r21,g21]=rgb_RGB(t21);
t22=imread('D:\matlab\皮肤库\22.jpg');[r22,g22]=rgb_RGB(t22);
t23=imread('D:\matlab\皮肤库\23.jpg');[r23,g23]=rgb_RGB(t23);
t24=imread('D:\matlab\皮肤库\24.jpg');[r24,g24]=rgb_RGB(t24);
t25=imread('D:\matlab\皮肤库\25.jpg');[r25,g25]=rgb_RGB(t25);
t26=imread('D:\matlab\皮肤库\26.jpg');[r26,g26]=rgb_RGB(t26);
t27=imread('D:\matlab\皮肤库\27.jpg');[r27,g27]=rgb_RGB(t27);
r=cat(1,r1,r2,r3,r4,r5,r6,r7,r8,r9,r10,r11,r12,r13,r14,r15,r16,r17,r18,r19,r20,r21,r22, r23,r24,r25,r26,r27);
g=cat(1,g1,g2,g3,g4,g5,g6,g7,g8,g9,g10,g11,g12,g13,g14,g15,g16,g17,g18,g19,g20 ,g21,g22,g23,g24,g25,g26,g27);
m=mean([r,g])
n=cov([r,g])
3.求质心
function [xmean, ymean] = center(bw)
bw=bwfill(bw,'holes');
area = bwarea(bw);
[m n] =size(bw);
bw=double(bw);
xmean =0; ymean = 0;
for i=1:m,
for j=1:n,
xmean = xmean + j*bw(i,j);
ymean = ymean + i*bw(i,j);
end;
end;
if(area==0)
xmean=0;
ymean=0;
else
xmean = xmean/area;
ymean = ymean/area;
xmean = round(xmean);
ymean = round(ymean);
end
4. 求偏转角度
function [theta] = orient(bw,xmean,ymean) [m n] =size(bw);
bw=double(bw);
a = 0;
b = 0;
c = 0;
for i=1:m,
for j=1:n,
a = a + (j - xmean)^2 * bw(i,j);
b = b + (j - xmean) * (i - ymean) * bw(i,j);
c = c + (i - ymean)^2 * bw(i,j);
