import java.lang.Math;

import java.awt.*;

public class ColorConverter{

public ColorConverter(){

}

//RGB轉換CMYk

public int[] rgb2cmyk(int R,int G,int B){

int cmyk []= new int[4];

cmyk[3]=(int)(Math.min(Math.min(255-R,255-G),255-B)/2.55);//cmykK

int MyR = (int)(R/2.55);

int Div = 100-cmyk[3];

if (Div == 0)Div = 1;

cmyk[0] = ((100-MyR-cmyk[3])/Div)*100;//cmykC

int MyG = (int)(G/2.55);

cmyk[1] = ((100-MyG-cmyk[3])/Div)*100;

int MyB = (int)(B/2.55);

cmyk[2] = ((100-MyB-cmyk[3])/Div)*100;

return cmyk;

}

public Color cmyk2rgb(int C,int M,int Y,int K){

float MyC = C/100;

float MyM = M/100;

float MyY = Y/100;

float MyK = K/100;

int R = (int)((1-(MyC*(1-MyK)+MyK))*255);

int G = (int)((1-(MyM*(1-MyK)+MyK))*255);

int B = (int)((1-(MyY*(1-MyK)+MyK))*255);

if (R<0) R=0;

if (G<0) G=0;

if (B<0) B=0;

if (R>255) R=255;

if (G>255) G=255;

if (B>255) B=255;

Color rgb = new Color(R,G,B);

return rgb;

}

public int[] rgb2yuv(int R,int G,int B){

int yuv[] = new int[3];

yuv[0] =(int)(0.299*R+0.587*G+0.114*B);

yuv[1] = (int)(-0.147*R-0.289*G+0.437*B);

yuv[2] = (int)(0.615*R-0.515*G-0.1*B);

return yuv;

}

public Color yuv2rgb(int y,int u,int v){

int R = (int)(y+1.14*v);

int G = (int)(y-0.394*u-0.581*v);

int B = (int)(y+2.028*u);

if (R<0) R=0;

if (G<0) G=0;

if (B<0) B=0;

if (R>255) R=255;

if (G>255) G=255;

if (B>255) B=255;

Color rgb=new Color(R,G,B);

return rgb;

}

public int[] rgb2yiq(int R,int G,int B){

int yiq[] = new int[3];

yiq[0] = (int)(0.299*R+0.587*G+0.114*B);

yiq[1] = (int)(0.596*R-0.274*G-0.322*B);

yiq[2] = (int)(0.212*R-0.523*G+0.311*B);

return yiq;

}

public Color yiq2rgb(float y,float i,float q){

int R = (int)(y+0.956*i+0.621*q);

int G = (int)(y-0.272*i-0.647*q);

int B = (int)(y-1.105*i+1.702*q);

if (R<0) R=0;

if (G<0) G=0;

if (B<0) B=0;

if (R>255) R=255;

if (G>255) G=255;

if (B>255) B=255;

Color rgb = new Color(R,G,B);

return rgb;

}

//RGB轉換YCbCr

public int[] rgb2ycbcr(int R, int G,int B){

int ycbcr[] = new int[3];

ycbcr[0] = (int)(0.299*R+0.587*G+0.114*B);

ycbcr[1] = (int)(-0.1687*R-0.3313*G+0.5*B+128);

if (ycbcr[1] > 255) ycbcr[1] = 255;

ycbcr[2] = (int)(0.5*R-0.4187*G-0.0813*B+128);

if (ycbcr[2] > 255) ycbcr[2] = 255;

return ycbcr;

}

public Color ycbcr2rgb(int Y,int Cb,int Cr){

int MyR = (int)(Y + 1.402 * (Cr -128));

int MyG = (int)(Y - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128));

int MyB = (int)(Y + 1.772 * (Cb -128));

if (MyR > 255) MyR = 255;

if (MyG > 255) MyG = 255;

if (MyB > 255) MyB = 255;

if (MyR < 0) MyR =0;

if (MyG < 0) MyG =0;

if (MyB < 0) MyB =0;

Color rgb = new Color(MyR,MyG,MyB);

return rgb;

}

}