import java.lang.Math;

import java.awt.*;

public class ColorConverter{

 public ColorConverter(){

 }

 //RGB转换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转换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;

 }

}