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import java.lang.Math;import java.awt.*;public class ColorConverter{public ColorConverter(){}//RGB转换CMYkpublic 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);//cmykKint MyR = (int)(R/2.55);int Div = 100-cmyk[3];if (Div == 0)Div = 1;cmyk[0] = ((100-MyR-cmyk[3])/Div)*100;//cmykCint 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YCbCrpublic 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;}}
