1mlib_ImageColorRGB2YCC(3MLImBe)diaLib Library Functiomnlsib_ImageColorRGB2YCC(3MLIB)
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6 mlib_ImageColorRGB2YCC - RGB to YCC color conversion
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9 cc [ flag... ] file... -lmlib [ library... ]
10 #include <mlib.h>
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12 mlib_status mlib_ImageColorRGB2YCC(mlib_image *dst, const mlib_image *src);
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16 The mlib_ImageColorRGB2YCC() function performs a color space conversion
17 from computer R'G'B' to ITU-R Rec.601 Y'CbCr.
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20 The source and destination images must be three-channel images.
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23 It uses the following equation:
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25 |Y'| |cmat[0] cmat[1] cmat[2]| |R'| |offset[0]|
26 |Cb| = |cmat[3] cmat[4] cmat[5]| * |G'| + |offset[1]|
27 |Cr| |cmat[6] cmat[7] cmat[8]| |B'| |offset[2]|
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31 where
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33 cmat[] = { 65.738/256, 129.057/256, 25.064/256,
34 -37.945/256, -74.494/256, 112.439/256,
35 112.439/256, -94.154/256, -18.285/256 };
36 offset[] = { 16, 128, 128 };
37 src[x][y] = { R', G', B' };
38 dst[x][y] = { Y', Cb, Cr };
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42 The function takes the following arguments:
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44 dst Pointer to destination image.
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47 src Pointer to source image.
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51 The function returns MLIB_SUCCESS if successful. Otherwise it returns
52 MLIB_FAILURE.
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55 See attributes(5) for descriptions of the following attributes:
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60 ┌─────────────────────────────┬─────────────────────────────┐
61 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
62 ├─────────────────────────────┼─────────────────────────────┤
63 │Interface Stability │Committed │
64 ├─────────────────────────────┼─────────────────────────────┤
65 │MT-Level │MT-Safe │
66 └─────────────────────────────┴─────────────────────────────┘
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69 mlib_ImageColorConvert2(3MLIB), mlib_ImageColorConvert2_Fp(3MLIB),
70 mlib_ImageColorRGB2YCC_Fp(3MLIB), mlib_ImageColorXYZ2RGB(3MLIB),
71 mlib_ImageColorXYZ2RGB_Fp(3MLIB), mlib_ImageColorYCC2RGB(3MLIB),
72 mlib_ImageColorYCC2RGB_Fp(3MLIB), attributes(5)
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76SunOS 5.11 2 Mar 2007 mlib_ImageColorRGB2YCC(3MLIB)