'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_ImageColorRGB2YCC 3MLIB "2 Mar 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_ImageColorRGB2YCC \- RGB to YCC color conversion
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_ImageColorRGB2YCC\fR(\fBmlib_image *\fR\fIdst\fR, \fBconst mlib_image *\fR\fIsrc\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_ImageColorRGB2YCC()\fR function performs a color space conversion from computer R'G'B' to ITU-R Rec.601 Y'CbCr.
.sp
.LP
The source and destination images must be three-channel images.
.sp
.LP
It uses the following equation:
.sp
.in +2
.nf
|Y'|   |cmat[0] cmat[1] cmat[2]|   |R'|   |offset[0]|
|Cb| = |cmat[3] cmat[4] cmat[5]| * |G'| + |offset[1]|
|Cr|   |cmat[6] cmat[7] cmat[8]|   |B'|   |offset[2]|
.fi
.in -2

.sp
.LP
where
.sp
.in +2
.nf
cmat[] = { 65.738/256, 129.057/256,  25.064/256,
          -37.945/256, -74.494/256, 112.439/256,
          112.439/256, -94.154/256, -18.285/256 };
offset[] = { 16, 128, 128 };
src[x][y] = { R', G', B' };
dst[x][y] = { Y', Cb, Cr };
.fi
.in -2

.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIdst\fR\fR
.ad
.RS 7n
.rt  
Pointer to destination image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsrc\fR\fR
.ad
.RS 7n
.rt  
Pointer to source image.
.RE

.SH RETURN VALUES
.sp
.LP
The function returns \fBMLIB_SUCCESS\fR if successful. Otherwise it returns \fBMLIB_FAILURE\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmlib_ImageColorConvert2\fR(3MLIB), \fBmlib_ImageColorConvert2_Fp\fR(3MLIB), \fBmlib_ImageColorRGB2YCC_Fp\fR(3MLIB), \fBmlib_ImageColorXYZ2RGB\fR(3MLIB), \fBmlib_ImageColorXYZ2RGB_Fp\fR(3MLIB), \fBmlib_ImageColorYCC2RGB\fR(3MLIB), \fBmlib_ImageColorYCC2RGB_Fp\fR(3MLIB), \fBattributes\fR(5)