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Commit 1c460341 authored by Maksim Shabunin's avatar Maksim Shabunin
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modules/imgproc/src/color.cpp
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......@@ -5852,7 +5852,6 @@ enum
trilinear_shift = 8 - lab_lut_shift + 1,
TRILINEAR_BASE = (1 << trilinear_shift)
};
static int16_t *RGB2LabLUT_s16;
static int16_t trilinearLUT[TRILINEAR_BASE*TRILINEAR_BASE*TRILINEAR_BASE*8];
static ushort LabToYF_b[256*2];
static const int minABvalue = -8145;
......@@ -5861,15 +5860,19 @@ static const int *abToXZ_b;
static const bool enableRGB2LuvInterpolation = true;
static const bool enablePackedRGB2Luv = true;
static const bool enablePackedLuv2RGB = true;
static int16_t *RGB2LuvLUT_s16;
static const softfloat uLow(-134), uHigh(220), uRange(uHigh-uLow);
static const softfloat vLow(-140), vHigh(122), vRange(vHigh-vLow);
static struct LABLUVLUT_s16_t {
const int16_t *RGB2LabLUT_s16;
const int16_t *RGB2LuvLUT_s16;
} LABLUVLUTs16 = {0, 0};
static struct LUVLUT_T {
const int *LuToUp_b;
const int *LvToVp_b;
const long long int *LvToVpl_b;
} LUVLUT;
} LUVLUT = {0, 0, 0};
#define clip(value) \
value < 0.0f ? 0.0f : value > 1.0f ? 1.0f : value;
......@@ -5881,6 +5884,12 @@ static const softdouble gammaLowScale = softdouble(323)/softdouble(25);
static const softdouble gammaPower = softdouble(12)/softdouble(5); // 2.4
static const softdouble gammaXshift = softdouble(11)/softdouble(200); // 0.055
static const softfloat lthresh = softfloat(216) / softfloat(24389); // 0.008856f = (6/29)^3
static const softfloat lscale = softfloat(841) / softfloat(108); // 7.787f = (29/3)^3/(29*4)
static const softfloat lbias = softfloat(16) / softfloat(116);
static const softfloat f255(255);
static inline softfloat applyGamma(softfloat x)
{
//return x <= 0.04045f ? x*(1.f/12.92f) : (float)std::pow((double)(x + 0.055)*(1./1.055), 2.4);
......@@ -5902,7 +5911,6 @@ static inline softfloat applyInvGamma(softfloat x)
static LUVLUT_T initLUTforLUV(int BASE, const softfloat &un, const softfloat &vn)
{
const softfloat oneof4 = softfloat::one()/softfloat(4);
const softfloat f255(255);
int *LuToUp_b = cv::allocSingleton<int>(256*256);
int *LvToVp_b = cv::allocSingleton<int>(256*256);
long long int *LvToVpl_b = cv::allocSingleton<long long int>(256*256);
......@@ -5957,16 +5965,135 @@ static int * initLUTforABXZ(int BASE)
return res;
}
inline void fill_one(int16_t *LAB, const int16_t *LAB_prev, int16_t *LUV, const int16_t *LUV_prev, int p, int q, int r, int _p, int _q, int _r)
{
do {
int idxold = 0;
idxold += min(p+(_p), (int)(LAB_LUT_DIM-1))*3;
idxold += min(q+(_q), (int)(LAB_LUT_DIM-1))*LAB_LUT_DIM*3;
idxold += min(r+(_r), (int)(LAB_LUT_DIM-1))*LAB_LUT_DIM*LAB_LUT_DIM*3;
int idxnew = p*3*8 + q*LAB_LUT_DIM*3*8 + r*LAB_LUT_DIM*LAB_LUT_DIM*3*8+4*(_p)+2*(_q)+(_r);
LAB[idxnew] = LAB_prev[idxold];
LAB[idxnew+8] = LAB_prev[idxold+1];
LAB[idxnew+16] = LAB_prev[idxold+2];
LUV[idxnew] = LUV_prev[idxold];
LUV[idxnew+8] = LUV_prev[idxold+1];
LUV[idxnew+16] = LUV_prev[idxold+2];
} while(0);
}
static LABLUVLUT_s16_t initLUTforLABLUVs16(const softfloat & un, const softfloat & vn)
{
int i;
softfloat scaledCoeffs[9], coeffs[9];
//RGB2Lab coeffs
softdouble scaleWhite[] = { softdouble::one()/D65[0],
softdouble::one(),
softdouble::one()/D65[2] };
for(i = 0; i < 3; i++ )
{
coeffs[i*3+2] = sRGB2XYZ_D65[i*3+0];
coeffs[i*3+1] = sRGB2XYZ_D65[i*3+1];
coeffs[i*3+0] = sRGB2XYZ_D65[i*3+2];
scaledCoeffs[i*3+0] = sRGB2XYZ_D65[i*3+2] * scaleWhite[i];
scaledCoeffs[i*3+1] = sRGB2XYZ_D65[i*3+1] * scaleWhite[i];
scaledCoeffs[i*3+2] = sRGB2XYZ_D65[i*3+0] * scaleWhite[i];
}
softfloat S0 = scaledCoeffs[0], S1 = scaledCoeffs[1], S2 = scaledCoeffs[2],
S3 = scaledCoeffs[3], S4 = scaledCoeffs[4], S5 = scaledCoeffs[5],
S6 = scaledCoeffs[6], S7 = scaledCoeffs[7], S8 = scaledCoeffs[8];
softfloat C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2],
C3 = coeffs[3], C4 = coeffs[4], C5 = coeffs[5],
C6 = coeffs[6], C7 = coeffs[7], C8 = coeffs[8];
//u, v: [-134.0, 220.0], [-140.0, 122.0]
static const softfloat lld(LAB_LUT_DIM - 1), f116(116), f16(16), f500(500), f200(200);
static const softfloat f100(100), f128(128), f256(256), lbase((int)LAB_BASE);
//903.3f = (29/3)^3
static const softfloat f9033 = softfloat(29*29*29)/softfloat(27);
static const softfloat f9of4 = softfloat(9)/softfloat(4);
static const softfloat f15(15), f3(3);
AutoBuffer<int16_t> RGB2Labprev(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3);
AutoBuffer<int16_t> RGB2Luvprev(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3);
for(int p = 0; p < LAB_LUT_DIM; p++)
{
for(int q = 0; q < LAB_LUT_DIM; q++)
{
for(int r = 0; r < LAB_LUT_DIM; r++)
{
int idx = p*3 + q*LAB_LUT_DIM*3 + r*LAB_LUT_DIM*LAB_LUT_DIM*3;
softfloat R = softfloat(p)/lld;
softfloat G = softfloat(q)/lld;
softfloat B = softfloat(r)/lld;
R = applyGamma(R);
G = applyGamma(G);
B = applyGamma(B);
//RGB 2 Lab LUT building
{
softfloat X = R*S0 + G*S1 + B*S2;
softfloat Y = R*S3 + G*S4 + B*S5;
softfloat Z = R*S6 + G*S7 + B*S8;
softfloat FX = X > lthresh ? cbrt(X) : mulAdd(X, lscale, lbias);
softfloat FY = Y > lthresh ? cbrt(Y) : mulAdd(Y, lscale, lbias);
softfloat FZ = Z > lthresh ? cbrt(Z) : mulAdd(Z, lscale, lbias);
softfloat L = Y > lthresh ? (f116*FY - f16) : (f9033*Y);
softfloat a = f500 * (FX - FY);
softfloat b = f200 * (FY - FZ);
RGB2Labprev[idx] = (int16_t)(cvRound(lbase*L/f100));
RGB2Labprev[idx+1] = (int16_t)(cvRound(lbase*(a + f128)/f256));
RGB2Labprev[idx+2] = (int16_t)(cvRound(lbase*(b + f128)/f256));
}
//RGB 2 Luv LUT building
{
softfloat X = R*C0 + G*C1 + B*C2;
softfloat Y = R*C3 + G*C4 + B*C5;
softfloat Z = R*C6 + G*C7 + B*C8;
softfloat L = Y < lthresh ? mulAdd(Y, lscale, lbias) : cbrt(Y);
L = L*f116 - f16;
softfloat d = softfloat(4*13)/max(X + f15 * Y + f3 * Z, softfloat(FLT_EPSILON));
softfloat u = L*(X*d - un);
softfloat v = L*(f9of4*Y*d - vn);
RGB2Luvprev[idx ] = (int16_t)cvRound(lbase*L/f100);
RGB2Luvprev[idx+1] = (int16_t)cvRound(lbase*(u-uLow)/uRange);
RGB2Luvprev[idx+2] = (int16_t)cvRound(lbase*(v-vLow)/vRange);
}
}
}
}
int16_t *RGB2LabLUT_s16 = cv::allocSingleton<int16_t>(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3*8);
int16_t *RGB2LuvLUT_s16 = cv::allocSingleton<int16_t>(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3*8);
for(int p = 0; p < LAB_LUT_DIM; p++)
for(int q = 0; q < LAB_LUT_DIM; q++)
for(int r = 0; r < LAB_LUT_DIM; r++)
for (int p_ = 0; p_ < 2; ++p_)
for (int q_ = 0; q_ < 2; ++q_)
for (int r_ = 0; r_ < 2; ++r_)
fill_one(RGB2LabLUT_s16, RGB2Labprev, RGB2LuvLUT_s16, RGB2Luvprev, p, q, r, p_, q_, r_);
LABLUVLUT_s16_t res;
res.RGB2LabLUT_s16 = RGB2LabLUT_s16;
res.RGB2LuvLUT_s16 = RGB2LuvLUT_s16;
return res;
}
static void initLabTabs()
{
static bool initialized = false;
if(!initialized)
{
static const softfloat lthresh = softfloat(216) / softfloat(24389); // 0.008856f = (6/29)^3
static const softfloat lscale = softfloat(841) / softfloat(108); // 7.787f = (29/3)^3/(29*4)
static const softfloat lbias = softfloat(16) / softfloat(116);
static const softfloat f255(255);
softfloat f[LAB_CBRT_TAB_SIZE+1], g[GAMMA_TAB_SIZE+1], ig[GAMMA_TAB_SIZE+1];
softfloat scale = softfloat::one()/softfloat(LabCbrtTabScale);
int i;
......@@ -6062,125 +6189,8 @@ static void initLabTabs()
static const bool calcLUT = enableRGB2LabInterpolation || enableRGB2LuvInterpolation;
if(calcLUT)
{
softfloat scaledCoeffs[9], coeffs[9];
//RGB2Lab coeffs
softdouble scaleWhite[] = { softdouble::one()/D65[0],
softdouble::one(),
softdouble::one()/D65[2] };
for(i = 0; i < 3; i++ )
{
coeffs[i*3+2] = sRGB2XYZ_D65[i*3+0];
coeffs[i*3+1] = sRGB2XYZ_D65[i*3+1];
coeffs[i*3+0] = sRGB2XYZ_D65[i*3+2];
scaledCoeffs[i*3+0] = sRGB2XYZ_D65[i*3+2] * scaleWhite[i];
scaledCoeffs[i*3+1] = sRGB2XYZ_D65[i*3+1] * scaleWhite[i];
scaledCoeffs[i*3+2] = sRGB2XYZ_D65[i*3+0] * scaleWhite[i];
}
softfloat S0 = scaledCoeffs[0], S1 = scaledCoeffs[1], S2 = scaledCoeffs[2],
S3 = scaledCoeffs[3], S4 = scaledCoeffs[4], S5 = scaledCoeffs[5],
S6 = scaledCoeffs[6], S7 = scaledCoeffs[7], S8 = scaledCoeffs[8];
softfloat C0 = coeffs[0], C1 = coeffs[1], C2 = coeffs[2],
C3 = coeffs[3], C4 = coeffs[4], C5 = coeffs[5],
C6 = coeffs[6], C7 = coeffs[7], C8 = coeffs[8];
//u, v: [-134.0, 220.0], [-140.0, 122.0]
static const softfloat lld(LAB_LUT_DIM - 1), f116(116), f16(16), f500(500), f200(200);
static const softfloat f100(100), f128(128), f256(256), lbase((int)LAB_BASE);
//903.3f = (29/3)^3
static const softfloat f9033 = softfloat(29*29*29)/softfloat(27);
static const softfloat f9of4 = softfloat(9)/softfloat(4);
static const softfloat f15(15), f3(3);
AutoBuffer<int16_t> RGB2Labprev(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3);
AutoBuffer<int16_t> RGB2Luvprev(LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3);
for(int p = 0; p < LAB_LUT_DIM; p++)
{
for(int q = 0; q < LAB_LUT_DIM; q++)
{
for(int r = 0; r < LAB_LUT_DIM; r++)
{
int idx = p*3 + q*LAB_LUT_DIM*3 + r*LAB_LUT_DIM*LAB_LUT_DIM*3;
softfloat R = softfloat(p)/lld;
softfloat G = softfloat(q)/lld;
softfloat B = softfloat(r)/lld;
R = applyGamma(R);
G = applyGamma(G);
B = applyGamma(B);
//RGB 2 Lab LUT building
{
softfloat X = R*S0 + G*S1 + B*S2;
softfloat Y = R*S3 + G*S4 + B*S5;
softfloat Z = R*S6 + G*S7 + B*S8;
softfloat FX = X > lthresh ? cbrt(X) : mulAdd(X, lscale, lbias);
softfloat FY = Y > lthresh ? cbrt(Y) : mulAdd(Y, lscale, lbias);
softfloat FZ = Z > lthresh ? cbrt(Z) : mulAdd(Z, lscale, lbias);
softfloat L = Y > lthresh ? (f116*FY - f16) : (f9033*Y);
softfloat a = f500 * (FX - FY);
softfloat b = f200 * (FY - FZ);
RGB2Labprev[idx] = (int16_t)(cvRound(lbase*L/f100));
RGB2Labprev[idx+1] = (int16_t)(cvRound(lbase*(a + f128)/f256));
RGB2Labprev[idx+2] = (int16_t)(cvRound(lbase*(b + f128)/f256));
}
//RGB 2 Luv LUT building
{
softfloat X = R*C0 + G*C1 + B*C2;
softfloat Y = R*C3 + G*C4 + B*C5;
softfloat Z = R*C6 + G*C7 + B*C8;
softfloat L = Y < lthresh ? mulAdd(Y, lscale, lbias) : cbrt(Y);
L = L*f116 - f16;
softfloat d = softfloat(4*13)/max(X + f15 * Y + f3 * Z, softfloat(FLT_EPSILON));
softfloat u = L*(X*d - un);
softfloat v = L*(f9of4*Y*d - vn);
RGB2Luvprev[idx ] = (int16_t)cvRound(lbase*L/f100);
RGB2Luvprev[idx+1] = (int16_t)cvRound(lbase*(u-uLow)/uRange);
RGB2Luvprev[idx+2] = (int16_t)cvRound(lbase*(v-vLow)/vRange);
}
}
}
}
RGB2LabLUT_s16 = new int16_t[LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3*8];
RGB2LuvLUT_s16 = new int16_t[LAB_LUT_DIM*LAB_LUT_DIM*LAB_LUT_DIM*3*8];
for(int p = 0; p < LAB_LUT_DIM; p++)
{
for(int q = 0; q < LAB_LUT_DIM; q++)
{
for(int r = 0; r < LAB_LUT_DIM; r++)
{
#define FILL(_p, _q, _r) \
do {\
int idxold = 0;\
idxold += min(p+(_p), (int)(LAB_LUT_DIM-1))*3;\
idxold += min(q+(_q), (int)(LAB_LUT_DIM-1))*LAB_LUT_DIM*3;\
idxold += min(r+(_r), (int)(LAB_LUT_DIM-1))*LAB_LUT_DIM*LAB_LUT_DIM*3;\
int idxnew = p*3*8 + q*LAB_LUT_DIM*3*8 + r*LAB_LUT_DIM*LAB_LUT_DIM*3*8+4*(_p)+2*(_q)+(_r);\
RGB2LabLUT_s16[idxnew] = RGB2Labprev[idxold];\
RGB2LabLUT_s16[idxnew+8] = RGB2Labprev[idxold+1];\
RGB2LabLUT_s16[idxnew+16] = RGB2Labprev[idxold+2];\
RGB2LuvLUT_s16[idxnew] = RGB2Luvprev[idxold];\
RGB2LuvLUT_s16[idxnew+8] = RGB2Luvprev[idxold+1];\
RGB2LuvLUT_s16[idxnew+16] = RGB2Luvprev[idxold+2];\
} while(0)
FILL(0, 0, 0); FILL(0, 0, 1);
FILL(0, 1, 0); FILL(0, 1, 1);
FILL(1, 0, 0); FILL(1, 0, 1);
FILL(1, 1, 0); FILL(1, 1, 1);
#undef FILL
}
}
}
LABLUVLUTs16 = initLUTforLABLUVs16(un, vn);
for(int16_t p = 0; p < TRILINEAR_BASE; p++)
{
......@@ -6506,7 +6516,7 @@ struct RGB2Lab_f
v_uint16x8 uibvec = v_reinterpret_as_u16(ibvec);
v_uint16x8 ui_lvec, ui_avec, ui_bvec;
trilinearPackedInterpolate(uirvec, uigvec, uibvec, RGB2LabLUT_s16, ui_lvec, ui_avec, ui_bvec);
trilinearPackedInterpolate(uirvec, uigvec, uibvec, LABLUVLUTs16.RGB2LabLUT_s16, ui_lvec, ui_avec, ui_bvec);
v_int16x8 i_lvec = v_reinterpret_as_s16(ui_lvec);
v_int16x8 i_avec = v_reinterpret_as_s16(ui_avec);
v_int16x8 i_bvec = v_reinterpret_as_s16(ui_bvec);
......@@ -6547,7 +6557,7 @@ struct RGB2Lab_f
int iR = cvRound(R*LAB_BASE), iG = cvRound(G*LAB_BASE), iB = cvRound(B*LAB_BASE);
int iL, ia, ib;
trilinearInterpolate(iR, iG, iB, RGB2LabLUT_s16, iL, ia, ib);
trilinearInterpolate(iR, iG, iB, LABLUVLUTs16.RGB2LabLUT_s16, iL, ia, ib);
float L = iL*1.0f/LAB_BASE, a = ia*1.0f/LAB_BASE, b = ib*1.0f/LAB_BASE;
dst[i] = L*100.0f;
......@@ -8127,8 +8137,8 @@ struct RGB2Luvinterpolate
trilinearInterpolate(R, G, B, RGB2LuvLUT_s16, L, u, v);
*/
v_uint16x8 l80, u80, v80, l81, u81, v81;
trilinearPackedInterpolate(r80, g80, b80, RGB2LuvLUT_s16, l80, u80, v80);
trilinearPackedInterpolate(r81, g81, b81, RGB2LuvLUT_s16, l81, u81, v81);
trilinearPackedInterpolate(r80, g80, b80, LABLUVLUTs16.RGB2LuvLUT_s16, l80, u80, v80);
trilinearPackedInterpolate(r81, g81, b81, LABLUVLUTs16.RGB2LuvLUT_s16, l81, u81, v81);
/*
dst[i] = saturate_cast<uchar>(L/baseDiv);
......@@ -8154,7 +8164,7 @@ struct RGB2Luvinterpolate
R = R*baseDiv, G = G*baseDiv, B = B*baseDiv;
int L, u, v;
trilinearInterpolate(R, G, B, RGB2LuvLUT_s16, L, u, v);
trilinearInterpolate(R, G, B, LABLUVLUTs16.RGB2LuvLUT_s16, L, u, v);
dst[i] = saturate_cast<uchar>(L/baseDiv);
dst[i+1] = saturate_cast<uchar>(u/baseDiv);
......@@ -8182,7 +8192,6 @@ struct RGB2Luv_b
&& enableBitExactness
&& enableRGB2LuvInterpolation);
static const softfloat f255(255);
#if CV_NEON
v_scale_inv = vdupq_n_f32(softfloat::one()/f255);
v_scale = vdupq_n_f32(f255/softfloat(100));
......@@ -8235,7 +8244,6 @@ struct RGB2Luv_b
int i, j, scn = srccn;
float CV_DECL_ALIGNED(16) buf[3*BLOCK_SIZE];
static const softfloat f255(255);
#if CV_SSE2
__m128 v_coeffs = _mm_set_ps(f255/softfloat(100), f255/vRange, f255/uRange, f255/softfloat(100));
__m128 v_res = _mm_set_ps(0.f, -vLow*f255/vRange, -uLow*f255/uRange, 0.f);
......@@ -8625,7 +8633,6 @@ struct Luv2RGB_b
uchar alpha = ColorChannel<uchar>::max();
float CV_DECL_ALIGNED(16) buf[3*BLOCK_SIZE];
static const softfloat f255(255);
static const softfloat fl = softfloat(100)/f255;
static const softfloat fu = uRange/f255;
static const softfloat fv = vRange/f255;
......
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