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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// Intel License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000, Intel Corporation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of Intel Corporation may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
#include "test_precomp.hpp"
using namespace cv;
using namespace std;
/////////////////////////// base test class for color transformations /////////////////////////
class CV_ColorCvtBaseTest : public cvtest::ArrayTest
{
public:
CV_ColorCvtBaseTest( bool custom_inv_transform, bool allow_32f, bool allow_16u );
protected:
int prepare_test_case( int test_case_idx );
void prepare_to_validation( int /*test_case_idx*/ );
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
void get_minmax_bounds( int i, int j, int type, Scalar& low, Scalar& high );
// input --- fwd_transform -> ref_output[0]
virtual void convert_forward( const Mat& src, Mat& dst );
// ref_output[0] --- inv_transform ---> ref_output[1] (or input -- copy --> ref_output[1])
virtual void convert_backward( const Mat& src, const Mat& dst, Mat& dst2 );
// called from default implementation of convert_forward
virtual void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
// called from default implementation of convert_backward
virtual void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
const char* fwd_code_str;
const char* inv_code_str;
void run_func();
bool allow_16u, allow_32f;
int blue_idx;
bool inplace;
bool custom_inv_transform;
int fwd_code, inv_code;
bool test_cpp;
int hue_range;
bool srgb;
};
CV_ColorCvtBaseTest::CV_ColorCvtBaseTest( bool _custom_inv_transform, bool _allow_32f, bool _allow_16u )
{
test_array[INPUT].push_back(NULL);
test_array[OUTPUT].push_back(NULL);
test_array[OUTPUT].push_back(NULL);
test_array[REF_OUTPUT].push_back(NULL);
test_array[REF_OUTPUT].push_back(NULL);
allow_16u = _allow_16u;
allow_32f = _allow_32f;
custom_inv_transform = _custom_inv_transform;
fwd_code = inv_code = -1;
element_wise_relative_error = false;
fwd_code_str = inv_code_str = 0;
test_cpp = false;
hue_range = 0;
blue_idx = 0;
srgb = false;
inplace = false;
}
void CV_ColorCvtBaseTest::get_minmax_bounds( int i, int j, int type, Scalar& low, Scalar& high )
{
cvtest::ArrayTest::get_minmax_bounds( i, j, type, low, high );
if( i == INPUT )
{
int depth = CV_MAT_DEPTH(type);
low = Scalar::all(0.);
high = Scalar::all( depth == CV_8U ? 256 : depth == CV_16U ? 65536 : 1. );
}
}
void CV_ColorCvtBaseTest::get_test_array_types_and_sizes( int test_case_idx,
vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
RNG& rng = ts->get_rng();
int depth, cn;
cvtest::ArrayTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
if( allow_16u && allow_32f )
{
depth = cvtest::randInt(rng) % 3;
depth = depth == 0 ? CV_8U : depth == 1 ? CV_16U : CV_32F;
}
else if( allow_16u || allow_32f )
{
depth = cvtest::randInt(rng) % 2;
depth = depth == 0 ? CV_8U : allow_16u ? CV_16U : CV_32F;
}
else
depth = CV_8U;
cn = (cvtest::randInt(rng) & 1) + 3;
blue_idx = cvtest::randInt(rng) & 1 ? 2 : 0;
srgb = (cvtest::randInt(rng) & 1) != 0;
types[INPUT][0] = CV_MAKETYPE(depth, cn);
types[OUTPUT][0] = types[REF_OUTPUT][0] = CV_MAKETYPE(depth, 3);
if( test_array[OUTPUT].size() > 1 )
types[OUTPUT][1] = types[REF_OUTPUT][1] = CV_MAKETYPE(depth, cn);
inplace = cn == 3 && cvtest::randInt(rng) % 2 != 0;
test_cpp = (cvtest::randInt(rng) & 256) == 0;
}
int CV_ColorCvtBaseTest::prepare_test_case( int test_case_idx )
{
int code = cvtest::ArrayTest::prepare_test_case( test_case_idx );
if( code > 0 && inplace )
cvtest::copy( test_mat[INPUT][0], test_mat[OUTPUT][0] );
return code;
}
void CV_ColorCvtBaseTest::run_func()
{
CvArr* out0 = test_array[OUTPUT][0];
cv::Mat _out0 = cv::cvarrToMat(out0), _out1 = cv::cvarrToMat(test_array[OUTPUT][1]);
if(!test_cpp)
cvCvtColor( inplace ? out0 : test_array[INPUT][0], out0, fwd_code );
else
cv::cvtColor( cv::cvarrToMat(inplace ? out0 : test_array[INPUT][0]), _out0, fwd_code, _out0.channels());
if( inplace )
{
cvCopy( out0, test_array[OUTPUT][1] );
out0 = test_array[OUTPUT][1];
}
if(!test_cpp)
cvCvtColor( out0, test_array[OUTPUT][1], inv_code );
else
cv::cvtColor(cv::cvarrToMat(out0), _out1, inv_code, _out1.channels());
}
void CV_ColorCvtBaseTest::prepare_to_validation( int /*test_case_idx*/ )
{
convert_forward( test_mat[INPUT][0], test_mat[REF_OUTPUT][0] );
convert_backward( test_mat[INPUT][0], test_mat[REF_OUTPUT][0],
test_mat[REF_OUTPUT][1] );
int depth = test_mat[REF_OUTPUT][0].depth();
if( depth == CV_8U && hue_range )
{
for( int y = 0; y < test_mat[REF_OUTPUT][0].rows; y++ )
{
uchar* h0 = test_mat[REF_OUTPUT][0].ptr(y);
uchar* h = test_mat[OUTPUT][0].ptr(y);
for( int x = 0; x < test_mat[REF_OUTPUT][0].cols; x++, h0 += 3, h += 3 )
{
if( abs(*h - *h0) >= hue_range-1 && (*h <= 1 || *h0 <= 1) )
*h = *h0 = 0;
}
}
}
}
void CV_ColorCvtBaseTest::convert_forward( const Mat& src, Mat& dst )
{
const float c8u = 0.0039215686274509803f; // 1./255
const float c16u = 1.5259021896696422e-005f; // 1./65535
int depth = src.depth();
int cn = src.channels(), dst_cn = dst.channels();
int cols = src.cols, dst_cols_n = dst.cols*dst_cn;
vector<float> _src_buf(src.cols*3);
vector<float> _dst_buf(dst.cols*3);
float* src_buf = &_src_buf[0];
float* dst_buf = &_dst_buf[0];
int i, j;
assert( (cn == 3 || cn == 4) && (dst_cn == 3 || dst_cn == 1) );
for( i = 0; i < src.rows; i++ )
{
switch( depth )
{
case CV_8U:
{
const uchar* src_row = src.ptr(i);
uchar* dst_row = dst.ptr(i);
for( j = 0; j < cols; j++ )
{
src_buf[j*3] = src_row[j*cn + blue_idx]*c8u;
src_buf[j*3+1] = src_row[j*cn + 1]*c8u;
src_buf[j*3+2] = src_row[j*cn + (blue_idx^2)]*c8u;
}
convert_row_bgr2abc_32f_c3( src_buf, dst_buf, cols );
for( j = 0; j < dst_cols_n; j++ )
{
int t = cvRound( dst_buf[j] );
dst_row[j] = saturate_cast<uchar>(t);
}
}
break;
case CV_16U:
{
const ushort* src_row = src.ptr<ushort>(i);
ushort* dst_row = dst.ptr<ushort>(i);
for( j = 0; j < cols; j++ )
{
src_buf[j*3] = src_row[j*cn + blue_idx]*c16u;
src_buf[j*3+1] = src_row[j*cn + 1]*c16u;
src_buf[j*3+2] = src_row[j*cn + (blue_idx^2)]*c16u;
}
convert_row_bgr2abc_32f_c3( src_buf, dst_buf, cols );
for( j = 0; j < dst_cols_n; j++ )
{
int t = cvRound( dst_buf[j] );
dst_row[j] = saturate_cast<ushort>(t);
}
}
break;
case CV_32F:
{
const float* src_row = src.ptr<float>(i);
float* dst_row = dst.ptr<float>(i);
for( j = 0; j < cols; j++ )
{
src_buf[j*3] = src_row[j*cn + blue_idx];
src_buf[j*3+1] = src_row[j*cn + 1];
src_buf[j*3+2] = src_row[j*cn + (blue_idx^2)];
}
convert_row_bgr2abc_32f_c3( src_buf, dst_row, cols );
}
break;
default:
assert(0);
}
}
}
void CV_ColorCvtBaseTest::convert_row_bgr2abc_32f_c3( const float* /*src_row*/,
float* /*dst_row*/, int /*n*/ )
{
}
void CV_ColorCvtBaseTest::convert_row_abc2bgr_32f_c3( const float* /*src_row*/,
float* /*dst_row*/, int /*n*/ )
{
}
void CV_ColorCvtBaseTest::convert_backward( const Mat& src, const Mat& dst, Mat& dst2 )
{
if( custom_inv_transform )
{
int depth = src.depth();
int src_cn = dst.channels(), cn = dst2.channels();
int cols_n = src.cols*src_cn, dst_cols = dst.cols;
vector<float> _src_buf(src.cols*3);
vector<float> _dst_buf(dst.cols*3);
float* src_buf = &_src_buf[0];
float* dst_buf = &_dst_buf[0];
int i, j;
assert( cn == 3 || cn == 4 );
for( i = 0; i < src.rows; i++ )
{
switch( depth )
{
case CV_8U:
{
const uchar* src_row = dst.ptr(i);
uchar* dst_row = dst2.ptr(i);
for( j = 0; j < cols_n; j++ )
src_buf[j] = src_row[j];
convert_row_abc2bgr_32f_c3( src_buf, dst_buf, dst_cols );
for( j = 0; j < dst_cols; j++ )
{
int b = cvRound( dst_buf[j*3]*255. );
int g = cvRound( dst_buf[j*3+1]*255. );
int r = cvRound( dst_buf[j*3+2]*255. );
dst_row[j*cn + blue_idx] = saturate_cast<uchar>(b);
dst_row[j*cn + 1] = saturate_cast<uchar>(g);
dst_row[j*cn + (blue_idx^2)] = saturate_cast<uchar>(r);
if( cn == 4 )
dst_row[j*cn + 3] = 255;
}
}
break;
case CV_16U:
{
const ushort* src_row = dst.ptr<ushort>(i);
ushort* dst_row = dst2.ptr<ushort>(i);
for( j = 0; j < cols_n; j++ )
src_buf[j] = src_row[j];
convert_row_abc2bgr_32f_c3( src_buf, dst_buf, dst_cols );
for( j = 0; j < dst_cols; j++ )
{
int b = cvRound( dst_buf[j*3]*65535. );
int g = cvRound( dst_buf[j*3+1]*65535. );
int r = cvRound( dst_buf[j*3+2]*65535. );
dst_row[j*cn + blue_idx] = saturate_cast<ushort>(b);
dst_row[j*cn + 1] = saturate_cast<ushort>(g);
dst_row[j*cn + (blue_idx^2)] = saturate_cast<ushort>(r);
if( cn == 4 )
dst_row[j*cn + 3] = 65535;
}
}
break;
case CV_32F:
{
const float* src_row = dst.ptr<float>(i);
float* dst_row = dst2.ptr<float>(i);
convert_row_abc2bgr_32f_c3( src_row, dst_buf, dst_cols );
for( j = 0; j < dst_cols; j++ )
{
float b = dst_buf[j*3];
float g = dst_buf[j*3+1];
float r = dst_buf[j*3+2];
dst_row[j*cn + blue_idx] = b;
dst_row[j*cn + 1] = g;
dst_row[j*cn + (blue_idx^2)] = r;
if( cn == 4 )
dst_row[j*cn + 3] = 1.f;
}
}
break;
default:
assert(0);
}
}
}
else
{
int i, j, k;
int elem_size = (int)src.elemSize(), elem_size1 = (int)src.elemSize1();
int width_n = src.cols*elem_size;
for( i = 0; i < src.rows; i++ )
{
memcpy( dst2.ptr(i), src.ptr(i), width_n );
if( src.channels() == 4 )
{
// clear the alpha channel
uchar* ptr = dst2.ptr(i) + elem_size1*3;
for( j = 0; j < width_n; j += elem_size )
{
for( k = 0; k < elem_size1; k++ )
ptr[j + k] = 0;
}
}
}
}
}
#undef INIT_FWD_INV_CODES
#define INIT_FWD_INV_CODES( fwd, inv ) \
fwd_code = CV_##fwd; inv_code = CV_##inv; \
fwd_code_str = #fwd; inv_code_str = #inv
//// rgb <=> gray
class CV_ColorGrayTest : public CV_ColorCvtBaseTest
{
public:
CV_ColorGrayTest();
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
double get_success_error_level( int test_case_idx, int i, int j );
};
CV_ColorGrayTest::CV_ColorGrayTest() : CV_ColorCvtBaseTest( true, true, true )
{
INIT_FWD_INV_CODES( BGR2GRAY, GRAY2BGR );
}
void CV_ColorGrayTest::get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
CV_ColorCvtBaseTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
int cn = CV_MAT_CN(types[INPUT][0]);
types[OUTPUT][0] = types[REF_OUTPUT][0] = types[INPUT][0] & CV_MAT_DEPTH_MASK;
inplace = false;
if( cn == 3 )
{
if( blue_idx == 0 )
fwd_code = CV_BGR2GRAY, inv_code = CV_GRAY2BGR;
else
fwd_code = CV_RGB2GRAY, inv_code = CV_GRAY2RGB;
}
else
{
if( blue_idx == 0 )
fwd_code = CV_BGRA2GRAY, inv_code = CV_GRAY2BGRA;
else
fwd_code = CV_RGBA2GRAY, inv_code = CV_GRAY2RGBA;
}
}
double CV_ColorGrayTest::get_success_error_level( int /*test_case_idx*/, int i, int j )
{
int depth = test_mat[i][j].depth();
return depth == CV_8U ? 2 : depth == CV_16U ? 16 : 1e-5;
}
void CV_ColorGrayTest::convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
double scale = depth == CV_8U ? 255 : depth == CV_16U ? 65535 : 1;
double cr = 0.299*scale;
double cg = 0.587*scale;
double cb = 0.114*scale;
int j;
for( j = 0; j < n; j++ )
dst_row[j] = (float)(src_row[j*3]*cb + src_row[j*3+1]*cg + src_row[j*3+2]*cr);
}
void CV_ColorGrayTest::convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n )
{
int j, depth = test_mat[INPUT][0].depth();
float scale = depth == CV_8U ? (1.f/255) : depth == CV_16U ? 1.f/65535 : 1.f;
for( j = 0; j < n; j++ )
dst_row[j*3] = dst_row[j*3+1] = dst_row[j*3+2] = src_row[j]*scale;
}
//// rgb <=> ycrcb
class CV_ColorYCrCbTest : public CV_ColorCvtBaseTest
{
public:
CV_ColorYCrCbTest();
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
double get_success_error_level( int test_case_idx, int i, int j );
void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
};
CV_ColorYCrCbTest::CV_ColorYCrCbTest() : CV_ColorCvtBaseTest( true, true, true )
{
INIT_FWD_INV_CODES( BGR2YCrCb, YCrCb2BGR );
}
void CV_ColorYCrCbTest::get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
CV_ColorCvtBaseTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
if( blue_idx == 0 )
fwd_code = CV_BGR2YCrCb, inv_code = CV_YCrCb2BGR;
else
fwd_code = CV_RGB2YCrCb, inv_code = CV_YCrCb2RGB;
}
double CV_ColorYCrCbTest::get_success_error_level( int /*test_case_idx*/, int i, int j )
{
int depth = test_mat[i][j].depth();
return depth == CV_8U ? 2 : depth == CV_16U ? 32 : 1e-3;
}
void CV_ColorYCrCbTest::convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
double scale = depth == CV_8U ? 255 : depth == CV_16U ? 65535 : 1;
double bias = depth == CV_8U ? 128 : depth == CV_16U ? 32768 : 0.5;
double M[] = { 0.299, 0.587, 0.114,
0.49981, -0.41853, -0.08128,
-0.16864, -0.33107, 0.49970 };
int j;
for( j = 0; j < 9; j++ )
M[j] *= scale;
for( j = 0; j < n*3; j += 3 )
{
double r = src_row[j+2];
double g = src_row[j+1];
double b = src_row[j];
double y = M[0]*r + M[1]*g + M[2]*b;
double cr = M[3]*r + M[4]*g + M[5]*b + bias;
double cb = M[6]*r + M[7]*g + M[8]*b + bias;
dst_row[j] = (float)y;
dst_row[j+1] = (float)cr;
dst_row[j+2] = (float)cb;
}
}
void CV_ColorYCrCbTest::convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
double bias = depth == CV_8U ? 128 : depth == CV_16U ? 32768 : 0.5;
double scale = depth == CV_8U ? 1./255 : depth == CV_16U ? 1./65535 : 1;
double M[] = { 1, 1.40252, 0,
1, -0.71440, -0.34434,
1, 0, 1.77305 };
int j;
for( j = 0; j < 9; j++ )
M[j] *= scale;
for( j = 0; j < n*3; j += 3 )
{
double y = src_row[j];
double cr = src_row[j+1] - bias;
double cb = src_row[j+2] - bias;
double r = M[0]*y + M[1]*cr + M[2]*cb;
double g = M[3]*y + M[4]*cr + M[5]*cb;
double b = M[6]*y + M[7]*cr + M[8]*cb;
dst_row[j] = (float)b;
dst_row[j+1] = (float)g;
dst_row[j+2] = (float)r;
}
}
//// rgb <=> hsv
class CV_ColorHSVTest : public CV_ColorCvtBaseTest
{
public:
CV_ColorHSVTest();
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
double get_success_error_level( int test_case_idx, int i, int j );
void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
};
CV_ColorHSVTest::CV_ColorHSVTest() : CV_ColorCvtBaseTest( true, true, false )
{
INIT_FWD_INV_CODES( BGR2HSV, HSV2BGR );
hue_range = 180;
}
void CV_ColorHSVTest::get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
CV_ColorCvtBaseTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
RNG& rng = ts->get_rng();
bool full_hrange = (rng.next() & 256) != 0;
if( full_hrange )
{
if( blue_idx == 0 )
fwd_code = CV_BGR2HSV_FULL, inv_code = CV_HSV2BGR_FULL;
else
fwd_code = CV_RGB2HSV_FULL, inv_code = CV_HSV2RGB_FULL;
hue_range = 256;
}
else
{
if( blue_idx == 0 )
fwd_code = CV_BGR2HSV, inv_code = CV_HSV2BGR;
else
fwd_code = CV_RGB2HSV, inv_code = CV_HSV2RGB;
hue_range = 180;
}
}
double CV_ColorHSVTest::get_success_error_level( int /*test_case_idx*/, int i, int j )
{
int depth = test_mat[i][j].depth();
return depth == CV_8U ? (j == 0 ? 4 : 16) : depth == CV_16U ? 32 : 1e-3;
}
void CV_ColorHSVTest::convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
float h_scale = depth == CV_8U ? hue_range*30.f/180 : 60.f;
float scale = depth == CV_8U ? 255.f : depth == CV_16U ? 65535.f : 1.f;
int j;
for( j = 0; j < n*3; j += 3 )
{
float r = src_row[j+2];
float g = src_row[j+1];
float b = src_row[j];
float vmin = MIN(r,g);
float v = MAX(r,g);
float s, h, diff;
vmin = MIN(vmin,b);
v = MAX(v,b);
diff = v - vmin;
if( diff == 0 )
s = h = 0;
else
{
s = diff/(v + FLT_EPSILON);
diff = 1.f/diff;
h = r == v ? (g - b)*diff :
g == v ? 2 + (b - r)*diff : 4 + (r - g)*diff;
if( h < 0 )
h += 6;
}
dst_row[j] = h*h_scale;
dst_row[j+1] = s*scale;
dst_row[j+2] = v*scale;
}
}
// taken from http://www.cs.rit.edu/~ncs/color/t_convert.html
void CV_ColorHSVTest::convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
float h_scale = depth == CV_8U ? 180/(hue_range*30.f) : 1.f/60;
float scale = depth == CV_8U ? 1.f/255 : depth == CV_16U ? 1.f/65535 : 1;
int j;
for( j = 0; j < n*3; j += 3 )
{
float h = src_row[j]*h_scale;
float s = src_row[j+1]*scale;
float v = src_row[j+2]*scale;
float r = v, g = v, b = v;
if( h < 0 )
h += 6;
else if( h >= 6 )
h -= 6;
if( s != 0 )
{
int i = cvFloor(h);
float f = h - i;
float p = v*(1 - s);
float q = v*(1 - s*f);
float t = v*(1 - s*(1 - f));
if( i == 0 )
r = v, g = t, b = p;
else if( i == 1 )
r = q, g = v, b = p;
else if( i == 2 )
r = p, g = v, b = t;
else if( i == 3 )
r = p, g = q, b = v;
else if( i == 4 )
r = t, g = p, b = v;
else
r = v, g = p, b = q;
}
dst_row[j] = b;
dst_row[j+1] = g;
dst_row[j+2] = r;
}
}
//// rgb <=> hls
class CV_ColorHLSTest : public CV_ColorCvtBaseTest
{
public:
CV_ColorHLSTest();
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
double get_success_error_level( int test_case_idx, int i, int j );
void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
};
CV_ColorHLSTest::CV_ColorHLSTest() : CV_ColorCvtBaseTest( true, true, false )
{
INIT_FWD_INV_CODES( BGR2HLS, HLS2BGR );
hue_range = 180;
}
void CV_ColorHLSTest::get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
CV_ColorCvtBaseTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
if( blue_idx == 0 )
fwd_code = CV_BGR2HLS, inv_code = CV_HLS2BGR;
else
fwd_code = CV_RGB2HLS, inv_code = CV_HLS2RGB;
}
double CV_ColorHLSTest::get_success_error_level( int /*test_case_idx*/, int i, int j )
{
int depth = test_mat[i][j].depth();
return depth == CV_8U ? (j == 0 ? 4 : 16) : depth == CV_16U ? 32 : 1e-4;
}
void CV_ColorHLSTest::convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
float h_scale = depth == CV_8U ? 30.f : 60.f;
float scale = depth == CV_8U ? 255.f : depth == CV_16U ? 65535.f : 1.f;
int j;
for( j = 0; j < n*3; j += 3 )
{
float r = src_row[j+2];
float g = src_row[j+1];
float b = src_row[j];
float vmin = MIN(r,g);
float v = MAX(r,g);
float s, h, l, diff;
vmin = MIN(vmin,b);
v = MAX(v,b);
diff = v - vmin;
if( diff == 0 )
s = h = 0, l = v;
else
{
l = (v + vmin)*0.5f;
s = l <= 0.5f ? diff / (v + vmin) : diff / (2 - v - vmin);
diff = 1.f/diff;
h = r == v ? (g - b)*diff :
g == v ? 2 + (b - r)*diff : 4 + (r - g)*diff;
if( h < 0 )
h += 6;
}
dst_row[j] = h*h_scale;
dst_row[j+1] = l*scale;
dst_row[j+2] = s*scale;
}
}
void CV_ColorHLSTest::convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
float h_scale = depth == CV_8U ? 1.f/30 : 1.f/60;
float scale = depth == CV_8U ? 1.f/255 : depth == CV_16U ? 1.f/65535 : 1;
int j;
for( j = 0; j < n*3; j += 3 )
{
float h = src_row[j]*h_scale;
float l = src_row[j+1]*scale;
float s = src_row[j+2]*scale;
float r = l, g = l, b = l;
if( h < 0 )
h += 6;
else if( h >= 6 )
h -= 6;
if( s != 0 )
{
float m2 = l <= 0.5f ? l*(1.f + s) : l + s - l*s;
float m1 = 2*l - m2;
float h1 = h + 2;
if( h1 >= 6 )
h1 -= 6;
if( h1 < 1 )
r = m1 + (m2 - m1)*h1;
else if( h1 < 3 )
r = m2;
else if( h1 < 4 )
r = m1 + (m2 - m1)*(4 - h1);
else
r = m1;
h1 = h;
if( h1 < 1 )
g = m1 + (m2 - m1)*h1;
else if( h1 < 3 )
g = m2;
else if( h1 < 4 )
g = m1 + (m2 - m1)*(4 - h1);
else
g = m1;
h1 = h - 2;
if( h1 < 0 )
h1 += 6;
if( h1 < 1 )
b = m1 + (m2 - m1)*h1;
else if( h1 < 3 )
b = m2;
else if( h1 < 4 )
b = m1 + (m2 - m1)*(4 - h1);
else
b = m1;
}
dst_row[j] = b;
dst_row[j+1] = g;
dst_row[j+2] = r;
}
}
// 0.412453, 0.357580, 0.180423,
// 0.212671, 0.715160, 0.072169,
// 0.019334, 0.119193, 0.950227
static const softdouble RGB2XYZ[] =
{
softdouble::fromRaw(0x3fda65a14488c60d),
softdouble::fromRaw(0x3fd6e297396d0918),
softdouble::fromRaw(0x3fc71819d2391d58),
softdouble::fromRaw(0x3fcb38cda6e75ff6),
softdouble::fromRaw(0x3fe6e297396d0918),
softdouble::fromRaw(0x3fb279aae6c8f755),
softdouble::fromRaw(0x3f93cc4ac6cdaf4b),
softdouble::fromRaw(0x3fbe836eb4e98138),
softdouble::fromRaw(0x3fee68427418d691)
};
// 3.240479, -1.53715, -0.498535,
// -0.969256, 1.875991, 0.041556,
// 0.055648, -0.204043, 1.057311
static const softdouble XYZ2RGB[] =
{
softdouble::fromRaw(0x4009ec804102ff8f),
softdouble::fromRaw(0xbff8982a9930be0e),
softdouble::fromRaw(0xbfdfe7ff583a53b9),
softdouble::fromRaw(0xbfef042528ae74f3),
softdouble::fromRaw(0x3ffe040f23897204),
softdouble::fromRaw(0x3fa546d3f9e7b80b),
softdouble::fromRaw(0x3fac7de5082cf52c),
softdouble::fromRaw(0xbfca1e14bdfd2631),
softdouble::fromRaw(0x3ff0eabef06b3786)
};
//0.950456
static const softdouble Xn = softdouble::fromRaw(0x3fee6a22b3892ee8);
//1.088754
static const softdouble Zn = softdouble::fromRaw(0x3ff16b8950763a19);
//// rgb <=> xyz
class CV_ColorXYZTest : public CV_ColorCvtBaseTest
{
public:
CV_ColorXYZTest();
protected:
void get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types );
double get_success_error_level( int test_case_idx, int i, int j );
void convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n );
void convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n );
};
CV_ColorXYZTest::CV_ColorXYZTest() : CV_ColorCvtBaseTest( true, true, true )
{
INIT_FWD_INV_CODES( BGR2XYZ, XYZ2BGR );
}
void CV_ColorXYZTest::get_test_array_types_and_sizes( int test_case_idx, vector<vector<Size> >& sizes, vector<vector<int> >& types )
{
CV_ColorCvtBaseTest::get_test_array_types_and_sizes( test_case_idx, sizes, types );
if( blue_idx == 0 )
fwd_code = CV_BGR2XYZ, inv_code = CV_XYZ2BGR;
else
fwd_code = CV_RGB2XYZ, inv_code = CV_XYZ2RGB;
}
double CV_ColorXYZTest::get_success_error_level( int /*test_case_idx*/, int i, int j )
{
int depth = test_mat[i][j].depth();
return depth == CV_8U ? (j == 0 ? 2 : 8) : depth == CV_16U ? (j == 0 ? 64 : 128) : 1e-1;
}
void CV_ColorXYZTest::convert_row_bgr2abc_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
softdouble scale(depth == CV_8U ? 255 :
depth == CV_16U ? 65535 : 1);
double M[9];
int j;
for( j = 0; j < 9; j++ )
M[j] = (double)(RGB2XYZ[j]*scale);
for( j = 0; j < n*3; j += 3 )
{
double r = src_row[j+2];
double g = src_row[j+1];
double b = src_row[j];
double x = M[0]*r + M[1]*g + M[2]*b;
double y = M[3]*r + M[4]*g + M[5]*b;
double z = M[6]*r + M[7]*g + M[8]*b;
dst_row[j] = (float)x;
dst_row[j+1] = (float)y;
dst_row[j+2] = (float)z;
}
}
void CV_ColorXYZTest::convert_row_abc2bgr_32f_c3( const float* src_row, float* dst_row, int n )
{
int depth = test_mat[INPUT][0].depth();
softdouble scale(depth == CV_8U ? 1./255 :
depth == CV_16U ? 1./65535 : 1);
double M[9];
int j;
for( j = 0; j < 9; j++ )
M[j] = (double)(XYZ2RGB[j]*scale);
for( j = 0; j < n*3; j += 3 )
{
double x = src_row[j];
double y = src_row[j+1];
double z = src_row[j+2];
double r = M[0]*x + M[1]*y + M[2]*z;
double g = M[3]*x + M[4]*y + M[5]*z;
double b = M[6]*x + M[7]*y + M[8]*z;
dst_row[j] = (float)b;
dst_row[j+1] = (float)g;
dst_row[j+2] = (float)r;
}
}
//// rgb <=> L*a*b*