HSL空間轉(zhuǎn)換到RGB空間matlab.doc

HSL空間轉(zhuǎn)換到RGB空間：function rgb=hsl2rgb(file_name)% a=imread(uigetfile(*.jpg,打開圖像);%a=imread(lenargb.jpg);% hsl=rgb2hsl(a);hsl=file_name;H=hsl(:,:,1);S=hsl(:,:,2);L=hsl(:,:,3);m,n=size(H);R=zeros(m,n);G=zeros(m,n);B=zeros(m,n);%求Rfor i=1:m for j=1:n if S(i,j)=0 R(i,j)=L(i,j); else if L(i,j)0.5 temp2=L(i,j)*(1.0+S(i,j); else temp2=L(i,j)+S(i,j)-L(i,j)*S(i,j); end end temp1=2*L(i,j)-temp2; h=H(i,j)/360; temp3=h+1/3; if temp31 temp3=temp3-1; end if 6*temp31 R(i,j)=temp1+(temp2-temp1)*6*temp3; else if 2*temp31 R(i,j)=temp2; else if 3*temp32 R(i,j)=temp1+(temp2-temp1)*(2/3-temp3)*6; else R(i,j)=temp1; end end end endend%求Gfor i=1:m for j=1:n if S(i,j)=0 G(i,j)=L(i,j); else if L(i,j)0.5 temp2=L(i,j)*(1.0+S(i,j); else temp2=L(i,j)+S(i,j)-L(i,j)*S(i,j); end end temp1=2*L(i,j)-temp2; h=H(i,j)/360; temp3=h; if temp31 temp3=temp3-1; end if 6*temp31 G(i,j)=temp1+(temp2-temp1)*6*temp3; else if 2*temp31 G(i,j)=temp2; else if 3*temp32 G(i,j)=temp1+(temp2-temp1)*(2/3-temp3)*6; else G(i,j)=temp1; end end end endend%求Bfor i=1:m for j=1:n if S(i,j)=0 B(i,j)=L(i,j); else if L(i,j)0.5 temp2=L(i,j)*(1.0+S(i,j); else temp2=L(i,j)+S(i,j)-L(i,j)*S(i,j); end end temp1=2*L(i,j)-temp2; h=H(i,j)/360; temp3=h-1/3; if temp31 temp3=temp3-1; end if 6*temp31 B(i,j)=temp1+(temp2-temp1)*6*temp3; else if 2*temp31 B(i,j)=temp2; else if 3*temp32 B(i,j)=temp1+(temp2-temp1