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opencv/modules/core/test/test_dxt.cpp
Alexander Smorkalov daa8f7dfc6 Partially back-port #25075 to 4.x
2024-03-05 12:15:39 +03:00

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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
#include "test_precomp.hpp"
namespace opencv_test { namespace {
static Mat initDFTWave( int n, bool inv )
{
int i;
double angle = (inv ? 1 : -1)*CV_PI*2/n;
Complexd wi, w1;
Mat wave(1, n, CV_64FC2);
Complexd* w = wave.ptr<Complexd>();
w1.re = cos(angle);
w1.im = sin(angle);
w[0].re = wi.re = 1.;
w[0].im = wi.im = 0.;
for( i = 1; i < n; i++ )
{
double t = wi.re*w1.re - wi.im*w1.im;
wi.im = wi.re*w1.im + wi.im*w1.re;
wi.re = t;
w[i] = wi;
}
return wave;
}
static void DFT_1D( const Mat& _src, Mat& _dst, int flags, const Mat& _wave=Mat())
{
_dst.create(_src.size(), _src.type());
int i, j, k, n = _dst.cols + _dst.rows - 1;
Mat wave = _wave;
double scale = (flags & DFT_SCALE) ? 1./n : 1.;
size_t esz = _src.elemSize();
size_t srcstep = esz, dststep = esz;
const uchar* src0 = _src.ptr();
uchar* dst0 = _dst.ptr();
CV_Assert( _src.cols + _src.rows - 1 == n );
if( wave.empty() )
wave = initDFTWave( n, (flags & DFT_INVERSE) != 0 );
const Complexd* w = wave.ptr<Complexd>();
if( !_src.isContinuous() )
srcstep = _src.step;
if( !_dst.isContinuous() )
dststep = _dst.step;
if( _src.type() == CV_32FC2 )
{
for( i = 0; i < n; i++ )
{
Complexf* dst = (Complexf*)(dst0 + i*dststep);
Complexd sum(0,0);
int delta = i;
k = 0;
for( j = 0; j < n; j++ )
{
const Complexf* src = (const Complexf*)(src0 + j*srcstep);
sum.re += src->re*w[k].re - src->im*w[k].im;
sum.im += src->re*w[k].im + src->im*w[k].re;
k += delta;
k -= (k >= n ? n : 0);
}
dst->re = (float)(sum.re*scale);
dst->im = (float)(sum.im*scale);
}
}
else if( _src.type() == CV_64FC2 )
{
for( i = 0; i < n; i++ )
{
Complexd* dst = (Complexd*)(dst0 + i*dststep);
Complexd sum(0,0);
int delta = i;
k = 0;
for( j = 0; j < n; j++ )
{
const Complexd* src = (const Complexd*)(src0 + j*srcstep);
sum.re += src->re*w[k].re - src->im*w[k].im;
sum.im += src->re*w[k].im + src->im*w[k].re;
k += delta;
k -= (k >= n ? n : 0);
}
dst->re = sum.re*scale;
dst->im = sum.im*scale;
}
}
else
CV_Error(cv::Error::StsUnsupportedFormat, "");
}
static void DFT_2D( const Mat& src, Mat& dst, int flags )
{
const int cn = 2;
int i;
dst.create(src.size(), src.type());
Mat tmp( src.cols, src.rows, src.type());
Mat wave = initDFTWave( dst.cols, (flags & DFT_INVERSE) != 0 );
// 1. row-wise transform
for( i = 0; i < dst.rows; i++ )
{
Mat srci = src.row(i).reshape(cn, src.cols), dsti = tmp.col(i);
DFT_1D(srci, dsti, flags, wave );
}
if( (flags & DFT_ROWS) == 0 )
{
if( dst.cols != dst.rows )
wave = initDFTWave( dst.rows, (flags & DFT_INVERSE) != 0 );
// 2. column-wise transform
for( i = 0; i < dst.cols; i++ )
{
Mat srci = tmp.row(i).reshape(cn, tmp.cols), dsti = dst.col(i);
DFT_1D(srci, dsti, flags, wave );
}
}
else
cvtest::transpose(tmp, dst);
}
static Mat initDCTWave( int n, bool inv )
{
int i, k;
double angle = CV_PI*0.5/n;
Mat wave(n, n, CV_64F);
double scale = sqrt(1./n);
for( k = 0; k < n; k++ )
wave.at<double>(0, k) = scale;
scale *= sqrt(2.);
for( i = 1; i < n; i++ )
for( k = 0; k < n; k++ )
wave.at<double>(i, k) = scale*cos( angle*i*(2*k + 1) );
if( inv )
cv::transpose( wave, wave );
return wave;
}
static void DCT_1D( const Mat& _src, Mat& _dst, int flags, const Mat& _wave=Mat() )
{
_dst.create( _src.size(), _src.type() );
int i, j, n = _dst.cols + _dst.rows - 1;
Mat wave = _wave;
int srcstep = 1, dststep = 1;
double* w;
CV_Assert( _src.cols + _src.rows - 1 == n);
if( wave.empty() )
wave = initDCTWave( n, (flags & DFT_INVERSE) != 0 );
w = wave.ptr<double>();
if( !_src.isContinuous() )
srcstep = (int)(_src.step/_src.elemSize());
if( !_dst.isContinuous() )
dststep = (int)(_dst.step/_dst.elemSize());
if( _src.type() == CV_32FC1 )
{
float *dst = _dst.ptr<float>();
for( i = 0; i < n; i++, dst += dststep )
{
const float* src = _src.ptr<float>();
double sum = 0;
for( j = 0; j < n; j++, src += srcstep )
sum += src[0]*w[j];
w += n;
dst[0] = (float)sum;
}
}
else if( _src.type() == CV_64FC1 )
{
double *dst = _dst.ptr<double>();
for( i = 0; i < n; i++, dst += dststep )
{
const double* src = _src.ptr<double>();
double sum = 0;
for( j = 0; j < n; j++, src += srcstep )
sum += src[0]*w[j];
w += n;
dst[0] = sum;
}
}
else
CV_Assert(0);
}
static void DCT_2D( const Mat& src, Mat& dst, int flags )
{
const int cn = 1;
int i;
dst.create( src.size(), src.type() );
Mat tmp(dst.cols, dst.rows, dst.type() );
Mat wave = initDCTWave( dst.cols, (flags & DCT_INVERSE) != 0 );
// 1. row-wise transform
for( i = 0; i < dst.rows; i++ )
{
Mat srci = src.row(i).reshape(cn, src.cols);
Mat dsti = tmp.col(i);
DCT_1D(srci, dsti, flags, wave);
}
if( (flags & DCT_ROWS) == 0 )
{
if( dst.cols != dst.rows )
wave = initDCTWave( dst.rows, (flags & DCT_INVERSE) != 0 );
// 2. column-wise transform
for( i = 0; i < dst.cols; i++ )
{
Mat srci = tmp.row(i).reshape(cn, tmp.cols);
Mat dsti = dst.col(i);
DCT_1D( srci, dsti, flags, wave );
}
}
else
cvtest::transpose( tmp, dst );
}
static void convertFromCCS( const Mat& _src0, const Mat& _src1, Mat& _dst, int flags )
{
if( _dst.rows > 1 && (_dst.cols > 1 || (flags & DFT_ROWS)) )
{
int i, count = _dst.rows, len = _dst.cols;
bool is2d = (flags & DFT_ROWS) == 0;
Mat src0row, src1row, dstrow;
for( i = 0; i < count; i++ )
{
int j = !is2d || i == 0 ? i : count - i;
src0row = _src0.row(i);
src1row = _src1.row(j);
dstrow = _dst.row(i);
convertFromCCS( src0row, src1row, dstrow, 0 );
}
if( is2d )
{
src0row = _src0.col(0);
dstrow = _dst.col(0);
convertFromCCS( src0row, src0row, dstrow, 0 );
if( (len & 1) == 0 )
{
src0row = _src0.col(_src0.cols - 1);
dstrow = _dst.col(len/2);
convertFromCCS( src0row, src0row, dstrow, 0 );
}
}
}
else
{
int i, n = _dst.cols + _dst.rows - 1, n2 = (n+1) >> 1;
int cn = _src0.channels();
int srcstep = cn, dststep = 1;
if( !_dst.isContinuous() )
dststep = (int)(_dst.step/_dst.elemSize());
if( !_src0.isContinuous() )
srcstep = (int)(_src0.step/_src0.elemSize1());
if( _dst.depth() == CV_32F )
{
Complexf* dst = _dst.ptr<Complexf>();
const float* src0 = _src0.ptr<float>();
const float* src1 = _src1.ptr<float>();
int delta0, delta1;
dst->re = src0[0];
dst->im = 0;
if( (n & 1) == 0 )
{
dst[n2*dststep].re = src0[(cn == 1 ? n-1 : n2)*srcstep];
dst[n2*dststep].im = 0;
}
delta0 = srcstep;
delta1 = delta0 + (cn == 1 ? srcstep : 1);
if( cn == 1 )
srcstep *= 2;
for( i = 1; i < n2; i++, delta0 += srcstep, delta1 += srcstep )
{
float t0 = src0[delta0];
float t1 = src0[delta1];
dst[i*dststep].re = t0;
dst[i*dststep].im = t1;
t0 = src1[delta0];
t1 = -src1[delta1];
dst[(n-i)*dststep].re = t0;
dst[(n-i)*dststep].im = t1;
}
}
else
{
Complexd* dst = _dst.ptr<Complexd>();
const double* src0 = _src0.ptr<double>();
const double* src1 = _src1.ptr<double>();
int delta0, delta1;
dst->re = src0[0];
dst->im = 0;
if( (n & 1) == 0 )
{
dst[n2*dststep].re = src0[(cn == 1 ? n-1 : n2)*srcstep];
dst[n2*dststep].im = 0;
}
delta0 = srcstep;
delta1 = delta0 + (cn == 1 ? srcstep : 1);
if( cn == 1 )
srcstep *= 2;
for( i = 1; i < n2; i++, delta0 += srcstep, delta1 += srcstep )
{
double t0 = src0[delta0];
double t1 = src0[delta1];
dst[i*dststep].re = t0;
dst[i*dststep].im = t1;
t0 = src1[delta0];
t1 = -src1[delta1];
dst[(n-i)*dststep].re = t0;
dst[(n-i)*dststep].im = t1;
}
}
}
}
static void fixCCS( Mat& mat, int cols, int flags )
{
int i, rows = mat.rows;
int rows2 = (flags & DFT_ROWS) ? rows : rows/2 + 1, cols2 = cols/2 + 1;
CV_Assert( cols2 == mat.cols );
if( mat.type() == CV_32FC2 )
{
for( i = 0; i < rows2; i++ )
{
Complexf* row = mat.ptr<Complexf>(i);
if( (flags & DFT_ROWS) || i == 0 || (i == rows2 - 1 && rows % 2 == 0) )
{
row[0].im = 0;
if( cols % 2 == 0 )
row[cols2-1].im = 0;
}
else
{
Complexf* row2 = mat.ptr<Complexf>(rows-i);
row2[0].re = row[0].re;
row2[0].im = -row[0].im;
if( cols % 2 == 0 )
{
row2[cols2-1].re = row[cols2-1].re;
row2[cols2-1].im = -row[cols2-1].im;
}
}
}
}
else if( mat.type() == CV_64FC2 )
{
for( i = 0; i < rows2; i++ )
{
Complexd* row = mat.ptr<Complexd>(i);
if( (flags & DFT_ROWS) || i == 0 || (i == rows2 - 1 && rows % 2 == 0) )
{
row[0].im = 0;
if( cols % 2 == 0 )
row[cols2-1].im = 0;
}
else
{
Complexd* row2 = mat.ptr<Complexd>(rows-i);
row2[0].re = row[0].re;
row2[0].im = -row[0].im;
if( cols % 2 == 0 )
{
row2[cols2-1].re = row[cols2-1].re;
row2[cols2-1].im = -row[cols2-1].im;
}
}
}
}
}
static void mulComplex( const Mat& src1, const Mat& src2, Mat& dst, int flags )
{
dst.create(src1.rows, src1.cols, src1.type());
int i, j, depth = src1.depth(), cols = src1.cols*2;
CV_Assert( src1.size == src2.size && src1.type() == src2.type() &&
(src1.type() == CV_32FC2 || src1.type() == CV_64FC2) );
const Mat* src1_ = &src1;
Mat src1_tmp;
if (dst.data == src1.data)
{
src1_tmp = src1.clone();
src1_ = &src1_tmp;
}
const Mat* src2_ = &src2;
Mat src2_tmp;
if (dst.data == src2.data)
{
src2_tmp = src2.clone();
src2_ = &src2_tmp;
}
for( i = 0; i < dst.rows; i++ )
{
if( depth == CV_32F )
{
const float* a = src1_->ptr<float>(i);
const float* b = src2_->ptr<float>(i);
float* c = dst.ptr<float>(i);
if( !(flags & CV_DXT_MUL_CONJ) )
for( j = 0; j < cols; j += 2 )
{
double re = (double)a[j]*(double)b[j] - (double)a[j+1]*(double)b[j+1];
double im = (double)a[j+1]*(double)b[j] + (double)a[j]*(double)b[j+1];
c[j] = (float)re;
c[j+1] = (float)im;
}
else
for( j = 0; j < cols; j += 2 )
{
double re = (double)a[j]*(double)b[j] + (double)a[j+1]*(double)b[j+1];
double im = (double)a[j+1]*(double)b[j] - (double)a[j]*(double)b[j+1];
c[j] = (float)re;
c[j+1] = (float)im;
}
}
else
{
const double* a = src1_->ptr<double>(i);
const double* b = src2_->ptr<double>(i);
double* c = dst.ptr<double>(i);
if( !(flags & CV_DXT_MUL_CONJ) )
for( j = 0; j < cols; j += 2 )
{
double re = a[j]*b[j] - a[j+1]*b[j+1];
double im = a[j+1]*b[j] + a[j]*b[j+1];
c[j] = re;
c[j+1] = im;
}
else
for( j = 0; j < cols; j += 2 )
{
double re = a[j]*b[j] + a[j+1]*b[j+1];
double im = a[j+1]*b[j] - a[j]*b[j+1];
c[j] = re;
c[j+1] = im;
}
}
}
}
class CxCore_DXTBaseTest : public cvtest::ArrayTest
{
public:
typedef cvtest::ArrayTest Base;
CxCore_DXTBaseTest( bool _allow_complex=false, bool _allow_odd=false,
bool _spectrum_mode=false );
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
int prepare_test_case( int test_case_idx );
double get_success_error_level( int /*test_case_idx*/, int /*i*/, int /*j*/ );
int flags; // transformation flags
bool allow_complex; // whether input/output may be complex or not:
// true for DFT and MulSpectrums, false for DCT
bool allow_odd; // whether input/output may be have odd (!=1) dimensions:
// true for DFT and MulSpectrums, false for DCT
bool spectrum_mode; // (2 complex/ccs inputs, 1 complex/ccs output):
// true for MulSpectrums, false for DFT and DCT
bool inplace; // inplace operation (set for each individual test case)
bool temp_dst; // use temporary destination (for real->ccs DFT and ccs MulSpectrums)
};
CxCore_DXTBaseTest::CxCore_DXTBaseTest( bool _allow_complex, bool _allow_odd, bool _spectrum_mode )
: Base(), flags(0), allow_complex(_allow_complex), allow_odd(_allow_odd),
spectrum_mode(_spectrum_mode), inplace(false), temp_dst(false)
{
test_array[INPUT].push_back(NULL);
if( spectrum_mode )
test_array[INPUT].push_back(NULL);
test_array[OUTPUT].push_back(NULL);
test_array[REF_OUTPUT].push_back(NULL);
test_array[TEMP].push_back(NULL);
test_array[TEMP].push_back(NULL);
max_log_array_size = 9;
element_wise_relative_error = spectrum_mode;
}
void CxCore_DXTBaseTest::get_test_array_types_and_sizes( int test_case_idx,
vector<vector<Size> >& sizes,
vector<vector<int> >& types )
{
RNG& rng = ts->get_rng();
int bits = cvtest::randInt(rng);
int depth = cvtest::randInt(rng)%2 + CV_32F;
int cn = !allow_complex || !(bits & 256) ? 1 : 2;
Size size;
Base::get_test_array_types_and_sizes( test_case_idx, sizes, types );
flags = bits & (CV_DXT_INVERSE | CV_DXT_SCALE | CV_DXT_ROWS | CV_DXT_MUL_CONJ);
if( spectrum_mode )
flags &= ~CV_DXT_INVERSE;
types[TEMP][0] = types[TEMP][1] = types[INPUT][0] =
types[OUTPUT][0] = CV_MAKETYPE(depth, cn);
size = sizes[INPUT][0];
temp_dst = false;
if( flags & CV_DXT_ROWS && (bits&1024) )
{
if( bits&16 )
size.width = 1;
else
size.height = 1;
flags &= ~CV_DXT_ROWS;
}
const int P2_MIN_SIZE = 32;
if( ((bits >> 10) & 1) == 0 )
{
size.width = (size.width / P2_MIN_SIZE)*P2_MIN_SIZE;
size.width = MAX(size.width, 1);
size.height = (size.height / P2_MIN_SIZE)*P2_MIN_SIZE;
size.height = MAX(size.height, 1);
}
if( !allow_odd )
{
if( size.width > 1 && (size.width&1) != 0 )
size.width = (size.width + 1) & -2;
if( size.height > 1 && (size.height&1) != 0 && !(flags & CV_DXT_ROWS) )
size.height = (size.height + 1) & -2;
}
sizes[INPUT][0] = sizes[OUTPUT][0] = size;
sizes[TEMP][0] = sizes[TEMP][1] = cvSize(0,0);
if( spectrum_mode )
{
if( cn == 1 )
{
types[OUTPUT][0] = depth + 8;
sizes[TEMP][0] = size;
}
sizes[INPUT][0] = sizes[INPUT][1] = size;
types[INPUT][1] = types[INPUT][0];
}
else if( /*(cn == 2 && (bits&32)) ||*/ (cn == 1 && allow_complex) )
{
types[TEMP][0] = depth + 8; // CV_??FC2
sizes[TEMP][0] = size;
size = cvSize(size.width/2+1, size.height);
if( flags & CV_DXT_INVERSE )
{
if( cn == 2 )
{
types[OUTPUT][0] = depth;
sizes[INPUT][0] = size;
}
types[TEMP][1] = types[TEMP][0];
sizes[TEMP][1] = sizes[TEMP][0];
}
else
{
if( allow_complex )
types[OUTPUT][0] = depth + 8;
if( cn == 2 )
{
types[INPUT][0] = depth;
types[TEMP][1] = types[TEMP][0];
sizes[TEMP][1] = size;
}
else
{
types[TEMP][1] = depth;
sizes[TEMP][1] = sizes[TEMP][0];
}
temp_dst = true;
}
}
inplace = false;
if( spectrum_mode ||
(!temp_dst && types[INPUT][0] == types[OUTPUT][0]) ||
(temp_dst && types[INPUT][0] == types[TEMP][1]) )
inplace = (bits & 64) != 0;
types[REF_OUTPUT][0] = types[OUTPUT][0];
sizes[REF_OUTPUT][0] = sizes[OUTPUT][0];
}
double CxCore_DXTBaseTest::get_success_error_level( int test_case_idx, int i, int j )
{
return Base::get_success_error_level( test_case_idx, i, j );
}
int CxCore_DXTBaseTest::prepare_test_case( int test_case_idx )
{
int code = Base::prepare_test_case( test_case_idx );
if( code > 0 )
{
int in_type = test_mat[INPUT][0].type();
int out_type = test_mat[OUTPUT][0].type();
if( CV_MAT_CN(in_type) == 2 && CV_MAT_CN(out_type) == 1 )
fixCCS( test_mat[INPUT][0], test_mat[OUTPUT][0].cols, flags );
if( inplace )
cvtest::copy( test_mat[INPUT][test_case_idx & (int)spectrum_mode],
temp_dst ? test_mat[TEMP][1] :
in_type == out_type ? test_mat[OUTPUT][0] :
test_mat[TEMP][0] );
}
return code;
}
////////////////////// FFT ////////////////////////
class CxCore_DFTTest : public CxCore_DXTBaseTest
{
public:
CxCore_DFTTest();
protected:
void run_func();
void prepare_to_validation( int test_case_idx );
};
CxCore_DFTTest::CxCore_DFTTest() : CxCore_DXTBaseTest( true, true, false )
{
}
void CxCore_DFTTest::run_func()
{
Mat& dst = temp_dst ? test_mat[TEMP][1] : test_mat[OUTPUT][0];
const Mat& src = inplace ? dst : test_mat[INPUT][0];
if(!(flags & CV_DXT_INVERSE))
cv::dft( src, dst, flags );
else
cv::idft(src, dst, flags & ~CV_DXT_INVERSE);
}
void CxCore_DFTTest::prepare_to_validation( int /*test_case_idx*/ )
{
Mat& src = test_mat[INPUT][0];
Mat& dst = test_mat[REF_OUTPUT][0];
Mat* tmp_src = &src;
Mat* tmp_dst = &dst;
int src_cn = src.channels();
int dst_cn = dst.channels();
if( src_cn != 2 || dst_cn != 2 )
{
tmp_src = &test_mat[TEMP][0];
if( !(flags & CV_DXT_INVERSE ) )
{
Mat& cvdft_dst = test_mat[TEMP][1];
convertFromCCS( cvdft_dst, cvdft_dst,
test_mat[OUTPUT][0], flags );
*tmp_src = Scalar::all(0);
cvtest::insert( src, *tmp_src, 0 );
}
else
{
convertFromCCS( src, src, *tmp_src, flags );
tmp_dst = &test_mat[TEMP][1];
}
}
if( src.rows == 1 || (src.cols == 1 && !(flags & CV_DXT_ROWS)) )
DFT_1D( *tmp_src, *tmp_dst, flags );
else
DFT_2D( *tmp_src, *tmp_dst, flags );
if( tmp_dst != &dst )
cvtest::extract( *tmp_dst, dst, 0 );
}
////////////////////// DCT ////////////////////////
class CxCore_DCTTest : public CxCore_DXTBaseTest
{
public:
CxCore_DCTTest();
protected:
void run_func();
void prepare_to_validation( int test_case_idx );
};
CxCore_DCTTest::CxCore_DCTTest() : CxCore_DXTBaseTest( false, false, false )
{
}
void CxCore_DCTTest::run_func()
{
Mat& dst = test_mat[OUTPUT][0];
const Mat& src = inplace ? dst : test_mat[INPUT][0];
if(!(flags & CV_DXT_INVERSE))
cv::dct( src, dst, flags );
else
cv::idct( src, dst, flags & ~CV_DXT_INVERSE);
}
void CxCore_DCTTest::prepare_to_validation( int /*test_case_idx*/ )
{
const Mat& src = test_mat[INPUT][0];
Mat& dst = test_mat[REF_OUTPUT][0];
if( src.rows == 1 || (src.cols == 1 && !(flags & CV_DXT_ROWS)) )
DCT_1D( src, dst, flags );
else
DCT_2D( src, dst, flags );
}
////////////////////// MulSpectrums ////////////////////////
class CxCore_MulSpectrumsTest : public CxCore_DXTBaseTest
{
public:
CxCore_MulSpectrumsTest();
protected:
void run_func();
void prepare_to_validation( int test_case_idx );
double get_success_error_level( int test_case_idx, int i, int j );
};
CxCore_MulSpectrumsTest::CxCore_MulSpectrumsTest() : CxCore_DXTBaseTest( true, true, true )
{
}
double CxCore_MulSpectrumsTest::get_success_error_level( int test_case_idx, int i, int j )
{
CV_UNUSED(test_case_idx);
CV_Assert(i == OUTPUT);
CV_Assert(j == 0);
int elem_depth = CV_MAT_DEPTH(cvGetElemType(test_array[i][j]));
CV_Assert(elem_depth == CV_32F || elem_depth == CV_64F);
element_wise_relative_error = false;
double maxInputValue = 1000; // ArrayTest::get_minmax_bounds
double err = 8 * maxInputValue; // result = A*B + C*D
return (elem_depth == CV_32F ? FLT_EPSILON : DBL_EPSILON) * err;
}
void CxCore_MulSpectrumsTest::run_func()
{
Mat& dst = !test_mat[TEMP].empty() && !test_mat[TEMP][0].empty() ?
test_mat[TEMP][0] : test_mat[OUTPUT][0];
const Mat* src1 = &test_mat[INPUT][0], *src2 = &test_mat[INPUT][1];
if( inplace )
{
if( ts->get_current_test_info()->test_case_idx & 1 )
src2 = &dst;
else
src1 = &dst;
}
cv::mulSpectrums( *src1, *src2, dst, flags, (flags & CV_DXT_MUL_CONJ) != 0 );
}
void CxCore_MulSpectrumsTest::prepare_to_validation( int /*test_case_idx*/ )
{
Mat* src1 = &test_mat[INPUT][0];
Mat* src2 = &test_mat[INPUT][1];
Mat& dst = test_mat[OUTPUT][0];
Mat& dst0 = test_mat[REF_OUTPUT][0];
int cn = src1->channels();
if( cn == 1 )
{
convertFromCCS( *src1, *src1, dst, flags );
convertFromCCS( *src2, *src2, dst0, flags );
src1 = &dst;
src2 = &dst0;
}
mulComplex( *src1, *src2, dst0, flags );
if( cn == 1 )
{
Mat& temp = test_mat[TEMP][0];
convertFromCCS( temp, temp, dst, flags );
}
}
TEST(Core_DCT, accuracy) { CxCore_DCTTest test; test.safe_run(); }
TEST(Core_DFT, accuracy) { CxCore_DFTTest test; test.safe_run(); }
TEST(Core_MulSpectrums, accuracy) { CxCore_MulSpectrumsTest test; test.safe_run(); }
class Core_DFTComplexOutputTest : public cvtest::BaseTest
{
public:
Core_DFTComplexOutputTest() {}
~Core_DFTComplexOutputTest() {}
protected:
void run(int)
{
RNG& rng = theRNG();
for( int i = 0; i < 10; i++ )
{
int m = rng.uniform(2, 11);
int n = rng.uniform(2, 11);
int depth = rng.uniform(0, 2) + CV_32F;
Mat src8u(m, n, depth), src(m, n, depth), dst(m, n, CV_MAKETYPE(depth, 2));
Mat z = Mat::zeros(m, n, depth), dstz;
randu(src8u, Scalar::all(0), Scalar::all(10));
src8u.convertTo(src, src.type());
dst = Scalar::all(123);
Mat mv[] = {src, z}, srcz;
merge(mv, 2, srcz);
dft(srcz, dstz);
dft(src, dst, DFT_COMPLEX_OUTPUT);
if (cvtest::norm(dst, dstz, NORM_INF) > 1e-3)
{
cout << "actual:\n" << dst << endl << endl;
cout << "reference:\n" << dstz << endl << endl;
CV_Error(cv::Error::StsError, "");
}
}
}
};
TEST(Core_DFT, complex_output) { Core_DFTComplexOutputTest test; test.safe_run(); }
TEST(Core_DFT, complex_output2)
{
for( int i = 0; i < 100; i++ )
{
int type = theRNG().uniform(0, 2) ? CV_64F : CV_32F;
int m = theRNG().uniform(1, 10);
int n = theRNG().uniform(1, 10);
Mat x(m, n, type), out;
randu(x, -1., 1.);
dft(x, out, DFT_ROWS | DFT_COMPLEX_OUTPUT);
double nrm = cvtest::norm(out, NORM_INF);
double thresh = n*m*2;
if( nrm > thresh )
{
cout << "x: " << x << endl;
cout << "out: " << out << endl;
ASSERT_LT(nrm, thresh);
}
}
}
class Core_DXTReverseTest : public cvtest::BaseTest
{
public:
enum Mode
{
ModeDFT,
ModeDCT
};
Core_DXTReverseTest(Mode m) : mode(m) {}
private:
Mode mode;
protected:
void run(int)
{
for (int i = 0; i < 3; ++i)
{
if (mode == ModeDCT && i != 0)
continue;
int flags = 0;
int flags_inv = DFT_INVERSE | DFT_SCALE;
int cn_in = 0;
int cn_out = 0;
switch (i)
{
case 0: cn_in = 1; cn_out = 1; break;
case 1: cn_in = 1; cn_out = 2; flags |= DFT_COMPLEX_OUTPUT; flags_inv |= DFT_REAL_OUTPUT; break;
case 2: cn_in = 2; cn_out = 2; break;
};
for (int j = 0; j < 100; ++j)
{
RNG& rng = ts->get_rng();
int type = rng.uniform(0, 2) ? CV_64F : CV_32F;
int m = rng.uniform(1, 10);
int n = rng.uniform(1, 10);
if (mode == ModeDCT)
{
m *= 2;
n *= 2;
}
Mat one(m, n, CV_MAKETYPE(type, cn_in));
cvtest::randUni(rng, one, Scalar::all(-1.), Scalar::all(1.));
Mat out;
Mat two;
if (mode == ModeDFT)
{
cv::dft(one, out, flags);
cv::dft(out, two, flags_inv);
}
else if (mode == ModeDCT)
{
cv::dct(one, out, flags);
cv::dct(out, two, flags_inv);
}
if (out.channels() != cn_out || two.channels() != cn_in || cvtest::norm(one, two, NORM_INF) > 1e-5)
{
cout << "Test #" << j + 1 << " - "
<< "elements: " << m << " x " << n << ", "
<< "channels: "
<< one.channels() << " (" << cn_in << ")" << " -> "
<< out.channels() << " (" << cn_out << ")" << " -> "
<< two.channels() << " (" << cn_in << ")"
<< endl;
cout << "signal:\n" << one << endl << endl;
cout << "spectrum:\n" << out << endl << endl;
cout << "inverse:\n" << two << endl << endl;
ts->set_failed_test_info(cvtest::TS::FAIL_INVALID_OUTPUT);
break;
}
}
}
}
};
TEST(Core_DFT, reverse) { Core_DXTReverseTest test(Core_DXTReverseTest::ModeDFT); test.safe_run(); }
TEST(Core_DCT, reverse) { Core_DXTReverseTest test(Core_DXTReverseTest::ModeDCT); test.safe_run(); }
}} // namespace
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