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Merge pull request #7546 from savuor:fix2.4/yuv_channel_order

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This commit is contained in:
Vadim Pisarevsky
2017-01-31 16:12:12 +00:00
parent f2a59b3d94 d23190dc3e
commit 19e4c7727b
2 changed files with 151 additions and 82 deletions
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modules/imgproc/src/color.cpp
+81 -43
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@@ -102,6 +102,38 @@ static IppStatus sts = ippInit();
namespace cv
{
//constants for conversion from/to RGB and Gray, YUV, YCrCb according to BT.601
const float B2YF = 0.114f;
const float G2YF = 0.587f;
const float R2YF = 0.299f;
//to YCbCr
const float YCBF = 0.564f; // == 1/2/(1-B2YF)
const float YCRF = 0.713f; // == 1/2/(1-R2YF)
const int YCBI = 9241; // == YCBF*16384
const int YCRI = 11682; // == YCRF*16384
//to YUV
const float B2UF = 0.492f;
const float R2VF = 0.877f;
const int B2UI = 8061; // == B2UF*16384
const int R2VI = 14369; // == R2VF*16384
//from YUV
const float U2BF = 2.032f;
const float U2GF = -0.395f;
const float V2GF = -0.581f;
const float V2RF = 1.140f;
const int U2BI = 33292;
const int U2GI = -6472;
const int V2GI = -9519;
const int V2RI = 18678;
//from YCrCb
const float CR2RF = 1.403f;
const float CB2GF = -0.344f;
const float CR2GF = -0.714f;
const float CB2BF = 1.773f;
const int CR2RI = 22987;
const int CB2GI = -5636;
const int CR2GI = -11698;
const int CB2BI = 29049;
// computes cubic spline coefficients for a function: (xi=i, yi=f[i]), i=0..n
template<typename _Tp> static void splineBuild(const _Tp* f, int n, _Tp* tab)
@@ -402,9 +434,9 @@ struct IPPColor2GrayFunctor
{
IPPColor2GrayFunctor(ippiColor2GrayFunc _func) : func(_func)
{
coeffs[0] = 0.114f;
coeffs[1] = 0.587f;
coeffs[2] = 0.299f;
coeffs[0] = B2YF;
coeffs[1] = G2YF;
coeffs[2] = R2YF;
}
bool operator()(const void *src, int srcStep, void *dst, int dstStep, int cols, int rows) const
{
@@ -668,9 +700,9 @@ enum
{
yuv_shift = 14,
xyz_shift = 12,
R2Y = 4899,
G2Y = 9617,
B2Y = 1868,
R2Y = 4899, // B2YF*16384
G2Y = 9617, // G2YF*16384
B2Y = 1868, // B2YF*16384
BLOCK_SIZE = 256
};
@@ -709,7 +741,7 @@ template<typename _Tp> struct RGB2Gray
RGB2Gray(int _srccn, int blueIdx, const float* _coeffs) : srccn(_srccn)
{
static const float coeffs0[] = { 0.299f, 0.587f, 0.114f };
static const float coeffs0[] = { R2YF, G2YF, B2YF };
memcpy( coeffs, _coeffs ? _coeffs : coeffs0, 3*sizeof(coeffs[0]) );
if(blueIdx == 0)
std::swap(coeffs[0], coeffs[2]);
@@ -787,16 +819,18 @@ template<typename _Tp> struct RGB2YCrCb_f
{
typedef _Tp channel_type;
RGB2YCrCb_f(int _srccn, int _blueIdx, const float* _coeffs) : srccn(_srccn), blueIdx(_blueIdx)
RGB2YCrCb_f(int _srccn, int _blueIdx, bool _isCrCb) : srccn(_srccn), blueIdx(_blueIdx), isCrCb(_isCrCb)
{
static const float coeffs0[] = {0.299f, 0.587f, 0.114f, 0.713f, 0.564f};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 5*sizeof(coeffs[0]));
static const float coeffs_crb[] = { R2YF, G2YF, B2YF, YCRF, YCBF };
static const float coeffs_yuv[] = { R2YF, G2YF, B2YF, R2VF, B2UF };
memcpy(coeffs, isCrCb ? coeffs_crb : coeffs_yuv, 5*sizeof(coeffs[0]));
if(blueIdx==0) std::swap(coeffs[0], coeffs[2]);
}
void operator()(const _Tp* src, _Tp* dst, int n) const
{
int scn = srccn, bidx = blueIdx;
int yuvOrder = !isCrCb; //1 if YUV, 0 if YCrCb
const _Tp delta = ColorChannel<_Tp>::half();
float C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3], C4 = coeffs[4];
n *= 3;
@@ -805,10 +839,11 @@ template<typename _Tp> struct RGB2YCrCb_f
_Tp Y = saturate_cast<_Tp>(src[0]*C0 + src[1]*C1 + src[2]*C2);
_Tp Cr = saturate_cast<_Tp>((src[bidx^2] - Y)*C3 + delta);
_Tp Cb = saturate_cast<_Tp>((src[bidx] - Y)*C4 + delta);
dst[i] = Y; dst[i+1] = Cr; dst[i+2] = Cb;
dst[i] = Y; dst[i+1+yuvOrder] = Cr; dst[i+2-yuvOrder] = Cb;
}
}
int srccn, blueIdx;
bool isCrCb;
float coeffs[5];
};
@@ -817,16 +852,18 @@ template<typename _Tp> struct RGB2YCrCb_i
{
typedef _Tp channel_type;
RGB2YCrCb_i(int _srccn, int _blueIdx, const int* _coeffs)
: srccn(_srccn), blueIdx(_blueIdx)
RGB2YCrCb_i(int _srccn, int _blueIdx, bool _isCrCb)
: srccn(_srccn), blueIdx(_blueIdx), isCrCb(_isCrCb)
{
static const int coeffs0[] = {R2Y, G2Y, B2Y, 11682, 9241};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 5*sizeof(coeffs[0]));
static const int coeffs_crb[] = { R2Y, G2Y, B2Y, YCRI, YCBI };
static const int coeffs_yuv[] = { R2Y, G2Y, B2Y, R2VI, B2UI };
memcpy(coeffs, isCrCb ? coeffs_crb : coeffs_yuv, 5*sizeof(coeffs[0]));
if(blueIdx==0) std::swap(coeffs[0], coeffs[2]);
}
void operator()(const _Tp* src, _Tp* dst, int n) const
{
int scn = srccn, bidx = blueIdx;
int yuvOrder = !isCrCb; //1 if YUV, 0 if YCrCb
int C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3], C4 = coeffs[4];
int delta = ColorChannel<_Tp>::half()*(1 << yuv_shift);
n *= 3;
@@ -836,11 +873,12 @@ template<typename _Tp> struct RGB2YCrCb_i
int Cr = CV_DESCALE((src[bidx^2] - Y)*C3 + delta, yuv_shift);
int Cb = CV_DESCALE((src[bidx] - Y)*C4 + delta, yuv_shift);
dst[i] = saturate_cast<_Tp>(Y);
dst[i+1] = saturate_cast<_Tp>(Cr);
dst[i+2] = saturate_cast<_Tp>(Cb);
dst[i+1+yuvOrder] = saturate_cast<_Tp>(Cr);
dst[i+2-yuvOrder] = saturate_cast<_Tp>(Cb);
}
}
int srccn, blueIdx;
bool isCrCb;
int coeffs[5];
};
@@ -849,23 +887,25 @@ template<typename _Tp> struct YCrCb2RGB_f
{
typedef _Tp channel_type;
YCrCb2RGB_f(int _dstcn, int _blueIdx, const float* _coeffs)
: dstcn(_dstcn), blueIdx(_blueIdx)
YCrCb2RGB_f(int _dstcn, int _blueIdx, bool _isCrCb)
: dstcn(_dstcn), blueIdx(_blueIdx), isCrCb(_isCrCb)
{
static const float coeffs0[] = {1.403f, -0.714f, -0.344f, 1.773f};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 4*sizeof(coeffs[0]));
static const float coeffs_cbr[] = {CR2RF, CR2GF, CB2GF, CB2BF};
static const float coeffs_yuv[] = { V2RF, V2GF, U2GF, U2BF};
memcpy(coeffs, isCrCb ? coeffs_cbr : coeffs_yuv, 4*sizeof(coeffs[0]));
}
void operator()(const _Tp* src, _Tp* dst, int n) const
{
int dcn = dstcn, bidx = blueIdx;
int yuvOrder = !isCrCb; //1 if YUV, 0 if YCrCb
const _Tp delta = ColorChannel<_Tp>::half(), alpha = ColorChannel<_Tp>::max();
float C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3];
n *= 3;
for(int i = 0; i < n; i += 3, dst += dcn)
{
_Tp Y = src[i];
_Tp Cr = src[i+1];
_Tp Cb = src[i+2];
_Tp Cr = src[i+1+yuvOrder];
_Tp Cb = src[i+2-yuvOrder];
_Tp b = saturate_cast<_Tp>(Y + (Cb - delta)*C3);
_Tp g = saturate_cast<_Tp>(Y + (Cb - delta)*C2 + (Cr - delta)*C1);
@@ -877,6 +917,7 @@ template<typename _Tp> struct YCrCb2RGB_f
}
}
int dstcn, blueIdx;
bool isCrCb;
float coeffs[4];
};
@@ -885,24 +926,26 @@ template<typename _Tp> struct YCrCb2RGB_i
{
typedef _Tp channel_type;
YCrCb2RGB_i(int _dstcn, int _blueIdx, const int* _coeffs)
: dstcn(_dstcn), blueIdx(_blueIdx)
YCrCb2RGB_i(int _dstcn, int _blueIdx, bool _isCrCb)
: dstcn(_dstcn), blueIdx(_blueIdx), isCrCb(_isCrCb)
{
static const int coeffs0[] = {22987, -11698, -5636, 29049};
memcpy(coeffs, _coeffs ? _coeffs : coeffs0, 4*sizeof(coeffs[0]));
static const int coeffs_crb[] = { CR2RI, CR2GI, CB2GI, CB2BI};
static const int coeffs_yuv[] = { V2RI, V2GI, U2GI, U2BI };
memcpy(coeffs, isCrCb ? coeffs_crb : coeffs_yuv, 4*sizeof(coeffs[0]));
}
void operator()(const _Tp* src, _Tp* dst, int n) const
{
int dcn = dstcn, bidx = blueIdx;
int yuvOrder = !isCrCb; //1 if YUV, 0 if YCrCb
const _Tp delta = ColorChannel<_Tp>::half(), alpha = ColorChannel<_Tp>::max();
int C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2], C3 = coeffs[3];
n *= 3;
for(int i = 0; i < n; i += 3, dst += dcn)
{
_Tp Y = src[i];
_Tp Cr = src[i+1];
_Tp Cb = src[i+2];
_Tp Cr = src[i+1+yuvOrder];
_Tp Cb = src[i+2-yuvOrder];
int b = Y + CV_DESCALE((Cb - delta)*C3, yuv_shift);
int g = Y + CV_DESCALE((Cb - delta)*C2 + (Cr - delta)*C1, yuv_shift);
@@ -916,6 +959,7 @@ template<typename _Tp> struct YCrCb2RGB_i
}
}
int dstcn, blueIdx;
bool isCrCb;
int coeffs[4];
};
@@ -3832,10 +3876,7 @@ void cv::cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
{
CV_Assert( scn == 3 || scn == 4 );
bidx = code == CV_BGR2YCrCb || code == CV_BGR2YUV ? 0 : 2;
static const float yuv_f[] = { 0.114f, 0.587f, 0.299f, 0.492f, 0.877f };
static const int yuv_i[] = { B2Y, G2Y, R2Y, 8061, 14369 };
const float* coeffs_f = code == CV_BGR2YCrCb || code == CV_RGB2YCrCb ? 0 : yuv_f;
const int* coeffs_i = code == CV_BGR2YCrCb || code == CV_RGB2YCrCb ? 0 : yuv_i;
const bool isCrCb = (code == CV_BGR2YCrCb || code == CV_RGB2YCrCb);
_dst.create(sz, CV_MAKETYPE(depth, 3));
dst = _dst.getMat();
@@ -3846,12 +3887,12 @@ void cv::cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
if((code == CV_RGB2YCrCb || code == CV_BGR2YCrCb) && tegra::cvtRGB2YCrCb(src, dst, bidx))
break;
#endif
CvtColorLoop(src, dst, RGB2YCrCb_i<uchar>(scn, bidx, coeffs_i));
CvtColorLoop(src, dst, RGB2YCrCb_i<uchar>(scn, bidx, isCrCb));
}
else if( depth == CV_16U )
CvtColorLoop(src, dst, RGB2YCrCb_i<ushort>(scn, bidx, coeffs_i));
CvtColorLoop(src, dst, RGB2YCrCb_i<ushort>(scn, bidx, isCrCb));
else
CvtColorLoop(src, dst, RGB2YCrCb_f<float>(scn, bidx, coeffs_f));
CvtColorLoop(src, dst, RGB2YCrCb_f<float>(scn, bidx, isCrCb));
}
break;
@@ -3861,20 +3902,17 @@ void cv::cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
if( dcn <= 0 ) dcn = 3;
CV_Assert( scn == 3 && (dcn == 3 || dcn == 4) );
bidx = code == CV_YCrCb2BGR || code == CV_YUV2BGR ? 0 : 2;
static const float yuv_f[] = { 2.032f, -0.395f, -0.581f, 1.140f };
static const int yuv_i[] = { 33292, -6472, -9519, 18678 };
const float* coeffs_f = code == CV_YCrCb2BGR || code == CV_YCrCb2RGB ? 0 : yuv_f;
const int* coeffs_i = code == CV_YCrCb2BGR || code == CV_YCrCb2RGB ? 0 : yuv_i;
const bool isCrCb = (code == CV_YCrCb2BGR || code == CV_YCrCb2RGB);
_dst.create(sz, CV_MAKETYPE(depth, dcn));
dst = _dst.getMat();
if( depth == CV_8U )
CvtColorLoop(src, dst, YCrCb2RGB_i<uchar>(dcn, bidx, coeffs_i));
CvtColorLoop(src, dst, YCrCb2RGB_i<uchar>(dcn, bidx, isCrCb));
else if( depth == CV_16U )
CvtColorLoop(src, dst, YCrCb2RGB_i<ushort>(dcn, bidx, coeffs_i));
CvtColorLoop(src, dst, YCrCb2RGB_i<ushort>(dcn, bidx, isCrCb));
else
CvtColorLoop(src, dst, YCrCb2RGB_f<float>(dcn, bidx, coeffs_f));
CvtColorLoop(src, dst, YCrCb2RGB_f<float>(dcn, bidx, isCrCb));
}
break;