1 //RGB to CMYk
2 int* rgb2cmyk(int R,int G,int B)
3 {
4 int cmyk [4];
5
6 cmyk[3]=(int)(min(min(255-R,255-G),255-B)/2.55);//cmykK
7 int MyR = (int)(R/2.55);
8 int Div = 100-cmyk[3];
9 if (Div == 0)Div = 1;
10 cmyk[0] = ((100-MyR-cmyk[3])/Div)*100;//cmykC
11 int MyG = (int)(G/2.55);
12 cmyk[1] = ((100-MyG-cmyk[3])/Div)*100;
13 int MyB = (int)(B/2.55);
14 cmyk[2] = ((100-MyB-cmyk[3])/Div)*100;
15
16 return cmyk;
17 }
18
19
20 //CMYK to RGB
21 int* cmyk2rgb(int C,int M,int Y,int K)
22 {
23 int rgb[3];
24 int *R=&rgb[0];
25 int *G=&rgb[1];
26 int *B=&rgb[2];
27
28 float MyC = C/100;
29 float MyM = M/100;
30 float MyY = Y/100;
31 float MyK = K/100;
32
33 int *R = (int)((1-(MyC*(1-MyK)+MyK))*255);
34 int *G = (int)((1-(MyM*(1-MyK)+MyK))*255);
35 int *B = (int)((1-(MyY*(1-MyK)+MyK))*255);
36
37 if (*R<0) *R=0;
38 if (*G<0) *G=0;
39 if (*B<0) *B=0;
40 if (*R>255) *R=255;
41 if (*G>255) *G=255;
42 if (*B>255) *B=255;
43
44 return rgb;
45 }
46
47
48 //RGB to YUV
49 int* rgb2yuv(int R,int G,int B)
50 {
51 int yuv[3];
52
53 yuv[0] = (int)(0.299*R+0.587*G+0.114*B);
54 yuv[1] = (int)(-0.147*R-0.289*G+0.437*B);
55 yuv[2] = (int)(0.615*R-0.515*G-0.1*B);
56
57 return yuv;
58 }
59
60
61 //YUV to RGB
62 int* yuv2rgb(int y,int u,int v)
63 {
64 int rgb[3];
65 int *R=&rgb[0];
66 int *G=&rgb[1];
67 int *B=&rgb[2];
68
69 *R = (int)(y+1.14*v);
70 *G = (int)(y-0.394*u-0.581*v);
71 *B = (int)(y+2.028*u);
72
73 if (*R<0) *R=0;
74 if (*G<0) *G=0;
75 if (*B<0) *B=0;
76 if (*R>255) *R=255;
77 if (*G>255) *G=255;
78 if (*B>255) *B=255;
79
80 return rgb;
81 }
82
83
84 //RGB to YIQ
85 int* rgb2yiq(int R,int G,int B)
86 {
87 int yiq[3];
88
89 yiq[0] = (int)(0.299*R+0.587*G+0.114*B);
90 yiq[1] = (int)(0.596*R-0.274*G-0.322*B);
91 yiq[2] = (int)(0.212*R-0.523*G+0.311*B);
92
93 return yiq;
94 }
95
96
97 //YIQ to RGB
98 int* yiq2rgb(float y,float i,float q)
99 {
100 int rgb[3];
101 int *R=&rgb[0];
102 int *G=&rgb[1];
103 int *B=&rgb[2];
104
105 *R = (int)(y+0.956*i+0.621*q);
106 *G = (int)(y-0.272*i-0.647*q);
107 *B = (int)(y-1.105*i+1.702*q);
108
109 if (*R<0) *R=0;
110 if (*G<0) *G=0;
111 if (*B<0) *B=0;
112 if (*R>255) *R=255;
113 if (*G>255) *G=255;
114 if (*B>255) *B=255;
115
116 return rgb;
117 }
118
119 //RGB to YCbCr
120 int* rgb2ycbcr(int R, int G,int B)
121 {
122 int ycbcr[3];
123
124 ycbcr[0] = (int)(0.299*R+0.587*G+0.114*B);
125
126 ycbcr[1] = (int)(-0.1687*R-0.3313*G+0.5*B+128);
127 if (ycbcr[1] > 255) ycbcr[1] = 255;
128
129 ycbcr[2] = (int)(0.5*R-0.4187*G-0.0813*B+128);
130 if (ycbcr[2] > 255) ycbcr[2] = 255;
131
132 return ycbcr;
133 }
134
135
136 //YCbCr to RGB
137 int* ycbcr2rgb(int Y,int Cb,int Cr)
138 {
139 int rgb[3];
140 int *R=&rgb[0];
141 int *G=&rgb[1];
142 int *B=&rgb[2];
143
144 *R = (int)(Y + 1.402 * (Cr -128));
145 *G = (int)(Y - 0.34414 * (Cb - 128) - 0.71414 * (Cr - 128));
146 *B = (int)(Y + 1.772 * (Cb -128));
147
148 if (*R > 255) *R = 255;
149 if (*G > 255) *G = 255;
150 if (*B > 255) *B = 255;
151
152 if (*R < 0) *R =0;
153 if (*G < 0) *G =0;
154 if (*B < 0) *B =0;
155
156 return rgb;
157 }
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