RGB_To_HLS.rar_HLS_HLS色彩变换_RGB to H_rgb to hls_rgb转换hls公式

#include <iostream> #include <string> #include <conio.h> using namespace std; struct RGB { float r; float g; float b; }; struct HLS { float h; float l; float s; }; float max(float a,float b,float c) { if((a>b)&&(a>c)) return a; if((b>a)&&(b>c)) return b; if((c>b)&&(c>a)) return c; } float min(float a,float b,float c) { if((a<b)&&(a<c)) return a; if((b<a)&&(b<c)) return b; if((c<b)&&(c<a)) return c; } void RGB_To_HLS(RGB a,HLS b) { float m,n,delta; m=max(a.r,a.g,a.b); n=min(a.r,a.g,a.b); b.l=(m+n)/2; if(m==n) { b.s=0; b.h=0; } else { if(b.l<=0.5) b.s=(m-n)/(m+n); else b.s=(m-n)/(2-m-n); delta=m-n; if(a.r==m) b.h=(a.g-a.b)/delta; else if(a.g==m) b.h=2+(a.b-a.r)/delta; else if(a.b==m) b.h=4+(a.r-a.g)/delta; b.h=b.h*60; if(b.h<0.0) b.h=b.h+360; } cout<<endl; cout<<"H="<<b.h<<endl; cout<<"L="<<b.l<<endl; cout<<"S="<<b.s<<endl; cout<<endl; } float value(float n1,float n2,float hue) { float v; if(hue>360) hue=hue-360; if(hue<0) hue=hue+360; if(hue<60) v=n1+(n2-n1)*hue/60; else if(hue<180) v=n2; else if(hue<240) v=n1+(n2-n1)*(240-hue)/60; else v=n1; return v; } void HLS_To_RGB(HLS a,RGB b) { float m1,m2; if(a.l<=0.5) m2=a.l*(1+a.s); else m2=a.l+a.s-a.l*a.s; m1=2*a.l-m2; if(a.s==0) if(a.h==0) b.r=b.g=b.b=1; else cout<<"错误！"<<endl; else { b.r=value(m1,m2,a.h+120); b.g=value(m1,m2,a.h); b.b=value(m1,m2,a.h-120); } cout<<endl; cout<<"R="<<b.r<<endl; cout<<"G="<<b.g<<endl; cout<<"B="<<b.b<<endl; cout<<endl; } void main() { RGB a; HLS b; a.r=a.g=a.b=0.0; b.h=b.l=b.s=0.0; string c; do { cout<<"请选择要进行的转换："<<endl; cout<<"1.将RGB转换为HLS"<<endl; cout<<"2.将HLS转换为RGB"<<endl; cout<<"3.退出"<<endl; c=getch(); if(c=="1") { cout<<endl; cout<<"请输入RGB的值（RGB取值都在0-1之间）"<<endl; cin>>a.r>>a.g>>a.b; RGB_To_HLS(a,b); } if(c=="2") { cout<<endl; cout<<"请输入HLS的值（H取值在0-360之间，L、S取值在0-1之间）"<<endl; cin>>b.h>>b.l>>b.s; HLS_To_RGB(b,a); } }while(c!="3"); }