Java Code

Color Space Conversions

RGB to YCbCr

void rgb2ycbcr(int r, int g, int b, int[] ycbcr) {
		int y  = (int)( 0.299   * r + 0.587   * g + 0.114   * b);
		int cb = (int)(-0.16874 * r - 0.33126 * g + 0.50000 * b);
		int cr = (int)( 0.50000 * r - 0.41869 * g - 0.08131 * b);
		
		ycbcr[0] = y;
		ycbcr[1] = cb;
		ycbcr[2] = cr;         
	}

RGB to YUV

void rgb2yuv(int r,int g, int b, int[] yuv,) {
		int y = (int)(0.299 * r + 0.587 * g + 0.114 * b);
		int u = (int)((b - y) * 0.492f); 
		int v = (int)((r - y) * 0.877f);
	
		yuv[0]= y;
		yuv[1]= u;
		yuv[2]= v;
	}

RGB to HSB

void rgb2hsb(int r, int g, int b, int[] hsb) {
		float [] hsbvals = new float[3]; 
		Color.RGBtoHSB(r, g, b, hsbvals);
}

RGB to HMMD

void rgb2hmmd(int r, int g, int b, int[] hmmd) {
	
		float max = (int)Math.max(Math.max(r,g), Math.max(g,b));
		float min = (int)Math.min(Math.min(r,g), Math.min(g,b));
		float diff = (max - min);
		float sum = (float) ((max + min)/2.);
	
		float hue = 0;
		if (diff == 0)
			hue = 0;
		else if (r == max && (g - b) > 0)
			hue = 60*(g-b)/(max-min);
		else if (r == max && (g - b) <= 0)
			hue = 60*(g-b)/(max-min) + 360;
		else if (g == max)
			hue = (float) (60*(2.+(b-r)/(max-min)));
		else if (b == max)
			hue = (float) (60*(4.+(r-g)/(max-min)));
						 
		hmmd[0] = (int)(hue);
		hmmd[1] = (int)(max);
		hmmd[2] = (int)(min);
		hmmd[3] = (int)(diff);
	}

RGB to HSL

private void rgb2hsl(int r, int g, int b, int hsl[]) {
							
		float var_R = ( r / 255f );                    
		float var_G = ( g / 255f );
		float var_B = ( b / 255f );
		
		float var_Min;    //Min. value of RGB
		float var_Max;    //Max. value of RGB
		float del_Max;    //Delta RGB value
						 
		if (var_R > var_G) 
			{ var_Min = var_G; var_Max = var_R; }
		else 
			{ var_Min = var_R; var_Max = var_G; }

		if (var_B > var_Max) var_Max = var_B;
		if (var_B < var_Min) var_Min = var_B;

		del_Max = var_Max - var_Min; 
								 
		float H = 0, S, L;
		L = ( var_Max + var_Min ) / 2f;
	
		if ( del_Max == 0 ) { H = 0; S = 0; } // gray
		else {                                //Chroma
			if ( L < 0.5 ) 
				S = del_Max / ( var_Max + var_Min );
			else           
				S = del_Max / ( 2 - var_Max - var_Min );
	
			float del_R = ( ( ( var_Max - var_R ) / 6f ) + ( del_Max / 2f ) ) / del_Max;
			float del_G = ( ( ( var_Max - var_G ) / 6f ) + ( del_Max / 2f ) ) / del_Max;
			float del_B = ( ( ( var_Max - var_B ) / 6f ) + ( del_Max / 2f ) ) / del_Max;
	
			if ( var_R == var_Max ) 
				H = del_B - del_G;
			else if ( var_G == var_Max ) 
				H = ( 1 / 3f ) + del_R - del_B;
			else if ( var_B == var_Max ) 
				H = ( 2 / 3f ) + del_G - del_R;
			if ( H < 0 ) H += 1;
			if ( H > 1 ) H -= 1;
		}
		hsl[0] = (int)(360*H);
		hsl[1] = (int)(S*100);
		hsl[2] = (int)(L*100);
	}

RGB to HSV

private void rgb2hsv(int r, int g, int b, int hsv[]) {
		
		int min;    //Min. value of RGB
		int max;    //Max. value of RGB
		int delMax; //Delta RGB value
		
		if (r > g) { min = g; max = r; }
		else { min = r; max = g; }
		if (b > max) max = b;
		if (b < min) min = b;
								
		delMax = max - min;
	 
		float H = 0, S;
		float V = max;
		   
		if ( delMax == 0 ) { H = 0; S = 0; }
		else {                                   
			S = delMax/255f;
			if ( r == max ) 
				H = (      (g - b)/(float)delMax)*60;
			else if ( g == max ) 
				H = ( 2 +  (b - r)/(float)delMax)*60;
			else if ( b == max ) 
				H = ( 4 +  (r - g)/(float)delMax)*60;   
		}
								 
		hsv[0] = (int)(H);
		hsv[1] = (int)(S*100);
		hsv[2] = (int)(V*100);
	}

RGB to xyY

public void rgb2xyY(int R, int G, int B, int []xyy) {
		//http://www.brucelindbloom.com
		
		float rf, gf, bf;
		float r, g, b, X, Y, Z;
		  
		// RGB to XYZ
		r = R/255.f; //R 0..1
		g = G/255.f; //G 0..1
		b = B/255.f; //B 0..1
		 
		if (r <= 0.04045)
			r = r/12;
		else
			r = (float) Math.pow((r+0.055)/1.055,2.4);
			  
		if (g <= 0.04045)
			g = g/12;
		else
			g = (float) Math.pow((g+0.055)/1.055,2.4);
		
		if (b <= 0.04045)
			b = b/12;
		else
			b = (float) Math.pow((b+0.055)/1.055,2.4);
		  
		X =  0.436052025f*r  + 0.385081593f*g  + 0.143087414f *b;
		Y =  0.222491598f*r  + 0.71688606f *g  + 0.060621486f *b;
		Z =  0.013929122f*r  + 0.097097002f*g  + 0.71418547f  *b;
		 
		float x;
		float y;
					  
		float sum = X + Y + Z;
		if (sum != 0) {
		x = X / sum;
		y = Y / sum;
		}
		else {
			float Xr = 0.964221f;  // reference white
			float Yr = 1.0f;
			float Zr = 0.825211f;
								 
		x = Xr / (Xr + Yr + Zr);
		y = Yr / (Xr + Yr + Zr);
		}
		   
		xyy[0] = (int) (255*x + .5);
		xyy[1] = (int) (255*y + .5);
		xyy[2] = (int) (255*Y + .5);
		 
	}

RGB to XYZ

public void rgb2xyz(int R, int G, int B, int []xyz) {
		float rf, gf, bf;
		float r, g, b, X, Y, Z;
								 
		r = R/255.f; //R 0..1
		g = G/255.f; //G 0..1
		b = B/255.f; //B 0..1
		 
		if (r <= 0.04045)
			r = r/12;
		else
			r = (float) Math.pow((r+0.055)/1.055,2.4);
		
		if (g <= 0.04045)
			g = g/12;
		else
			g = (float) Math.pow((g+0.055)/1.055,2.4);
		
		if (b <= 0.04045)
			b = b/12;
		else
			b = (float) Math.pow((b+0.055)/1.055,2.4);
		 
		X =  0.436052025f*r     + 0.385081593f*g + 0.143087414f *b;
		Y =  0.222491598f*r     + 0.71688606f *g + 0.060621486f *b;
		Z =  0.013929122f*r     + 0.097097002f*g + 0.71418547f  *b;
							 
		xyz[1] = (int) (255*Y + .5);
		xyz[0] = (int) (255*X + .5); 
		xyz[2] = (int) (255*Z + .5);    
	}

RGB to LAB

public void rgb2lab(int R, int G, int B, int []lab) {
		//http://www.brucelindbloom.com
		  
		float r, g, b, X, Y, Z, fx, fy, fz, xr, yr, zr;
		float Ls, as, bs;
		float eps = 216.f/24389.f;
		float k = 24389.f/27.f;
		   
		float Xr = 0.964221f;  // reference white D50
		float Yr = 1.0f;
		float Zr = 0.825211f;
		
		// RGB to XYZ
		r = R/255.f; //R 0..1
		g = G/255.f; //G 0..1
		b = B/255.f; //B 0..1
		
		// assuming sRGB (D65)
		if (r <= 0.04045)
			r = r/12;
		else
			r = (float) Math.pow((r+0.055)/1.055,2.4);
		
		if (g <= 0.04045)
			g = g/12;
		else
			g = (float) Math.pow((g+0.055)/1.055,2.4);
		
		if (b <= 0.04045)
			b = b/12;
		else
			b = (float) Math.pow((b+0.055)/1.055,2.4);
		
		
		X =  0.436052025f*r     + 0.385081593f*g + 0.143087414f *b;
		Y =  0.222491598f*r     + 0.71688606f *g + 0.060621486f *b;
		Z =  0.013929122f*r     + 0.097097002f*g + 0.71418547f  *b;
		
		// XYZ to Lab
		xr = X/Xr;
		yr = Y/Yr;
		zr = Z/Zr;
				
		if ( xr > eps )
			fx =  (float) Math.pow(xr, 1/3.);
		else
			fx = (float) ((k * xr + 16.) / 116.);
		 
		if ( yr > eps )
			fy =  (float) Math.pow(yr, 1/3.);
		else
		fy = (float) ((k * yr + 16.) / 116.);
		
		if ( zr > eps )
			fz =  (float) Math.pow(zr, 1/3.);
		else
			fz = (float) ((k * zr + 16.) / 116);
		
		Ls = ( 116 * fy ) - 16;
		as = 500*(fx-fy);
		bs = 200*(fy-fz);
		
		lab[0] = (int) (2.55*Ls + .5);
		lab[1] = (int) (as + .5); 
		lab[2] = (int) (bs + .5);       
	}

RGB to LUV

public void rgb2luv(int R, int G, int B, int []luv) {
		//http://www.brucelindbloom.com
		
		float rf, gf, bf;
		float r, g, b, X_, Y_, Z_, X, Y, Z, fx, fy, fz, xr, yr, zr;
		float L;
		float eps = 216.f/24389.f;
		float k = 24389.f/27.f;
		 
		float Xr = 0.964221f;  // reference white D50
		float Yr = 1.0f;
		float Zr = 0.825211f;
		 
		// RGB to XYZ
		 
		r = R/255.f; //R 0..1
		g = G/255.f; //G 0..1
		b = B/255.f; //B 0..1
		   
		// assuming sRGB (D65)
		if (r <= 0.04045)
			r = r/12;
		else
			r = (float) Math.pow((r+0.055)/1.055,2.4);
		
		if (g <= 0.04045)
			g = g/12;
		else
			g = (float) Math.pow((g+0.055)/1.055,2.4);
		 
		if (b <= 0.04045)
			b = b/12;
		else
			b = (float) Math.pow((b+0.055)/1.055,2.4);
		
		
		X =  0.436052025f*r     + 0.385081593f*g + 0.143087414f *b;
		Y =  0.222491598f*r     + 0.71688606f *g + 0.060621486f *b;
		Z =  0.013929122f*r     + 0.097097002f*g + 0.71418547f  *b;
		
		// XYZ to Luv
		
		float u, v, u_, v_, ur_, vr_;
						
		u_ = 4*X / (X + 15*Y + 3*Z);
		v_ = 9*Y / (X + 15*Y + 3*Z);
				 
		ur_ = 4*Xr / (Xr + 15*Yr + 3*Zr);
		vr_ = 9*Yr / (Xr + 15*Yr + 3*Zr);
		  
		yr = Y/Yr;
		
		if ( yr > eps )
			L =  (float) (116*Math.pow(yr, 1/3.) - 16);
		else
			L = k * yr;
		 
		u = 13*L*(u_ -ur_);
		v = 13*L*(v_ -vr_);
		
		luv[0] = (int) (2.55*L + .5);
		luv[1] = (int) (u + .5); 
		luv[2] = (int) (v + .5);        
	}

Color Inspector 3D

Color Space Conversions

RGB to YCbCr

RGB to YUV

RGB to HSB

RGB to HMMD

RGB to HSL

RGB to HSV

RGB to xyY

RGB to XYZ

RGB to LAB

RGB to LUV