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opencv/modules/imgproc/src/corner.cpp

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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.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Copyright (C) 2014-2015, Itseez Inc., 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 the copyright holders 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 "precomp.hpp"
#include "opencl_kernels_imgproc.hpp"
#include "opencv2/core/hal/intrin.hpp"
#include "corner.hpp"
namespace cv
{
static void calcMinEigenVal( const Mat& _cov, Mat& _dst )
{
int i, j;
Size size = _cov.size();
#if CV_TRY_AVX
bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
#endif
if( _cov.isContinuous() && _dst.isContinuous() )
{
size.width *= size.height;
size.height = 1;
}
for( i = 0; i < size.height; i++ )
{
const float* cov = _cov.ptr<float>(i);
float* dst = _dst.ptr<float>(i);
#if CV_TRY_AVX
if( haveAvx )
j = calcMinEigenValLine_AVX(cov, dst, size.width);
else
#endif // CV_TRY_AVX
j = 0;
#if CV_SIMD128
{
v_float32x4 half = v_setall_f32(0.5f);
for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
{
v_float32x4 v_a, v_b, v_c, v_t;
v_load_deinterleave(cov + j*3, v_a, v_b, v_c);
v_a *= half;
v_c *= half;
v_t = v_a - v_c;
v_t = v_muladd(v_b, v_b, (v_t * v_t));
v_store(dst + j, (v_a + v_c) - v_sqrt(v_t));
}
}
#endif // CV_SIMD128
for( ; j < size.width; j++ )
{
float a = cov[j*3]*0.5f;
float b = cov[j*3+1];
float c = cov[j*3+2]*0.5f;
dst[j] = (float)((a + c) - std::sqrt((a - c)*(a - c) + b*b));
}
}
}
static void calcHarris( const Mat& _cov, Mat& _dst, double k )
{
int i, j;
Size size = _cov.size();
#if CV_TRY_AVX
bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
#endif
if( _cov.isContinuous() && _dst.isContinuous() )
{
size.width *= size.height;
size.height = 1;
}
for( i = 0; i < size.height; i++ )
{
const float* cov = _cov.ptr<float>(i);
float* dst = _dst.ptr<float>(i);
#if CV_TRY_AVX
if( haveAvx )
j = calcHarrisLine_AVX(cov, dst, k, size.width);
else
#endif // CV_TRY_AVX
j = 0;
#if CV_SIMD128
{
v_float32x4 v_k = v_setall_f32((float)k);
for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
{
v_float32x4 v_a, v_b, v_c;
v_load_deinterleave(cov + j * 3, v_a, v_b, v_c);
v_float32x4 v_ac_bb = v_a * v_c - v_b * v_b;
v_float32x4 v_ac = v_a + v_c;
v_float32x4 v_dst = v_ac_bb - v_k * v_ac * v_ac;
v_store(dst + j, v_dst);
}
}
#endif // CV_SIMD128
for( ; j < size.width; j++ )
{
float a = cov[j*3];
float b = cov[j*3+1];
float c = cov[j*3+2];
dst[j] = (float)(a*c - b*b - k*(a + c)*(a + c));
}
}
}
static void eigen2x2( const float* cov, float* dst, int n )
{
for( int j = 0; j < n; j++ )
{
double a = cov[j*3];
double b = cov[j*3+1];
double c = cov[j*3+2];
double u = (a + c)*0.5;
double v = std::sqrt((a - c)*(a - c)*0.25 + b*b);
double l1 = u + v;
double l2 = u - v;
double x = b;
double y = l1 - a;
double e = fabs(x);
if( e + fabs(y) < 1e-4 )
{
y = b;
x = l1 - c;
e = fabs(x);
if( e + fabs(y) < 1e-4 )
{
e = 1./(e + fabs(y) + FLT_EPSILON);
x *= e, y *= e;
}
}
double d = 1./std::sqrt(x*x + y*y + DBL_EPSILON);
dst[6*j] = (float)l1;
dst[6*j + 2] = (float)(x*d);
dst[6*j + 3] = (float)(y*d);
x = b;
y = l2 - a;
e = fabs(x);
if( e + fabs(y) < 1e-4 )
{
y = b;
x = l2 - c;
e = fabs(x);
if( e + fabs(y) < 1e-4 )
{
e = 1./(e + fabs(y) + FLT_EPSILON);
x *= e, y *= e;
}
}
d = 1./std::sqrt(x*x + y*y + DBL_EPSILON);
dst[6*j + 1] = (float)l2;
dst[6*j + 4] = (float)(x*d);
dst[6*j + 5] = (float)(y*d);
}
}
static void calcEigenValsVecs( const Mat& _cov, Mat& _dst )
{
Size size = _cov.size();
if( _cov.isContinuous() && _dst.isContinuous() )
{
size.width *= size.height;
size.height = 1;
}
for( int i = 0; i < size.height; i++ )
{
const float* cov = _cov.ptr<float>(i);
float* dst = _dst.ptr<float>(i);
eigen2x2(cov, dst, size.width);
}
}
enum { MINEIGENVAL=0, HARRIS=1, EIGENVALSVECS=2 };
static void
cornerEigenValsVecs( const Mat& src, Mat& eigenv, int block_size,
int aperture_size, int op_type, double k=0.,
int borderType=BORDER_DEFAULT )
{
#ifdef HAVE_TEGRA_OPTIMIZATION
if (tegra::useTegra() && tegra::cornerEigenValsVecs(src, eigenv, block_size, aperture_size, op_type, k, borderType))
return;
#endif
#if CV_TRY_AVX
bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
#endif
int depth = src.depth();
double scale = (double)(1 << ((aperture_size > 0 ? aperture_size : 3) - 1)) * block_size;
if( aperture_size < 0 )
scale *= 2.0;
if( depth == CV_8U )
scale *= 255.0;
scale = 1.0/scale;
CV_Assert( src.type() == CV_8UC1 || src.type() == CV_32FC1 );
Mat Dx, Dy;
if( aperture_size > 0 )
{
Sobel( src, Dx, CV_32F, 1, 0, aperture_size, scale, 0, borderType );
Sobel( src, Dy, CV_32F, 0, 1, aperture_size, scale, 0, borderType );
}
else
{
Scharr( src, Dx, CV_32F, 1, 0, scale, 0, borderType );
Scharr( src, Dy, CV_32F, 0, 1, scale, 0, borderType );
}
Size size = src.size();
Mat cov( size, CV_32FC3 );
int i, j;
for( i = 0; i < size.height; i++ )
{
float* cov_data = cov.ptr<float>(i);
const float* dxdata = Dx.ptr<float>(i);
const float* dydata = Dy.ptr<float>(i);
#if CV_TRY_AVX
if( haveAvx )
j = cornerEigenValsVecsLine_AVX(dxdata, dydata, cov_data, size.width);
else
#endif // CV_TRY_AVX
j = 0;
#if CV_SIMD128
{
for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
{
v_float32x4 v_dx = v_load(dxdata + j);
v_float32x4 v_dy = v_load(dydata + j);
v_float32x4 v_dst0, v_dst1, v_dst2;
v_dst0 = v_dx * v_dx;
v_dst1 = v_dx * v_dy;
v_dst2 = v_dy * v_dy;
v_store_interleave(cov_data + j * 3, v_dst0, v_dst1, v_dst2);
}
}
#endif // CV_SIMD128
for( ; j < size.width; j++ )
{
float dx = dxdata[j];
float dy = dydata[j];
cov_data[j*3] = dx*dx;
cov_data[j*3+1] = dx*dy;
cov_data[j*3+2] = dy*dy;
}
}
boxFilter(cov, cov, cov.depth(), Size(block_size, block_size),
Point(-1,-1), false, borderType );
if( op_type == MINEIGENVAL )
calcMinEigenVal( cov, eigenv );
else if( op_type == HARRIS )
calcHarris( cov, eigenv, k );
else if( op_type == EIGENVALSVECS )
calcEigenValsVecs( cov, eigenv );
}
#ifdef HAVE_OPENCL
static bool extractCovData(InputArray _src, UMat & Dx, UMat & Dy, int depth,
float scale, int aperture_size, int borderType)
{
UMat src = _src.getUMat();
Size wholeSize;
Point ofs;
src.locateROI(wholeSize, ofs);
const int sobel_lsz = 16;
if ((aperture_size == 3 || aperture_size == 5 || aperture_size == 7 || aperture_size == -1) &&
wholeSize.height > sobel_lsz + (aperture_size >> 1) &&
wholeSize.width > sobel_lsz + (aperture_size >> 1))
{
CV_Assert(depth == CV_8U || depth == CV_32F);
Dx.create(src.size(), CV_32FC1);
Dy.create(src.size(), CV_32FC1);
size_t localsize[2] = { (size_t)sobel_lsz, (size_t)sobel_lsz };
size_t globalsize[2] = { localsize[0] * (1 + (src.cols - 1) / localsize[0]),
localsize[1] * (1 + (src.rows - 1) / localsize[1]) };
int src_offset_x = (int)((src.offset % src.step) / src.elemSize());
int src_offset_y = (int)(src.offset / src.step);
const char * const borderTypes[] = { "BORDER_CONSTANT", "BORDER_REPLICATE", "BORDER_REFLECT",
"BORDER_WRAP", "BORDER_REFLECT101" };
ocl::Kernel k(format("sobel%d", aperture_size).c_str(), ocl::imgproc::covardata_oclsrc,
cv::format("-D BLK_X=%d -D BLK_Y=%d -D %s -D SRCTYPE=%s%s",
(int)localsize[0], (int)localsize[1], borderTypes[borderType], ocl::typeToStr(depth),
aperture_size < 0 ? " -D SCHARR" : ""));
if (k.empty())
return false;
k.args(ocl::KernelArg::PtrReadOnly(src), (int)src.step, src_offset_x, src_offset_y,
ocl::KernelArg::WriteOnlyNoSize(Dx), ocl::KernelArg::WriteOnly(Dy),
wholeSize.height, wholeSize.width, scale);
return k.run(2, globalsize, localsize, false);
}
else
{
if (aperture_size > 0)
{
Sobel(_src, Dx, CV_32F, 1, 0, aperture_size, scale, 0, borderType);
Sobel(_src, Dy, CV_32F, 0, 1, aperture_size, scale, 0, borderType);
}
else
{
Scharr(_src, Dx, CV_32F, 1, 0, scale, 0, borderType);
Scharr(_src, Dy, CV_32F, 0, 1, scale, 0, borderType);
}
}
return true;
}
static bool ocl_cornerMinEigenValVecs(InputArray _src, OutputArray _dst, int block_size,
int aperture_size, double k, int borderType, int op_type)
{
CV_Assert(op_type == HARRIS || op_type == MINEIGENVAL);
if ( !(borderType == BORDER_CONSTANT || borderType == BORDER_REPLICATE ||
borderType == BORDER_REFLECT || borderType == BORDER_REFLECT_101) )
return false;
int type = _src.type(), depth = CV_MAT_DEPTH(type);
if ( !(type == CV_8UC1 || type == CV_32FC1) )
return false;
const char * const borderTypes[] = { "BORDER_CONSTANT", "BORDER_REPLICATE", "BORDER_REFLECT",
"BORDER_WRAP", "BORDER_REFLECT101" };
const char * const cornerType[] = { "CORNER_MINEIGENVAL", "CORNER_HARRIS", 0 };
double scale = (double)(1 << ((aperture_size > 0 ? aperture_size : 3) - 1)) * block_size;
if (aperture_size < 0)
scale *= 2.0;
if (depth == CV_8U)
scale *= 255.0;
scale = 1.0 / scale;
UMat Dx, Dy;
if (!extractCovData(_src, Dx, Dy, depth, (float)scale, aperture_size, borderType))
return false;
ocl::Kernel cornelKernel("corner", ocl::imgproc::corner_oclsrc,
format("-D anX=%d -D anY=%d -D ksX=%d -D ksY=%d -D %s -D %s",
block_size / 2, block_size / 2, block_size, block_size,
borderTypes[borderType], cornerType[op_type]));
if (cornelKernel.empty())
return false;
_dst.createSameSize(_src, CV_32FC1);
UMat dst = _dst.getUMat();
cornelKernel.args(ocl::KernelArg::ReadOnly(Dx), ocl::KernelArg::ReadOnly(Dy),
ocl::KernelArg::WriteOnly(dst), (float)k);
size_t blockSizeX = 256, blockSizeY = 1;
size_t gSize = blockSizeX - block_size / 2 * 2;
size_t globalSizeX = (Dx.cols) % gSize == 0 ? Dx.cols / gSize * blockSizeX : (Dx.cols / gSize + 1) * blockSizeX;
size_t rows_per_thread = 2;
size_t globalSizeY = ((Dx.rows + rows_per_thread - 1) / rows_per_thread) % blockSizeY == 0 ?
((Dx.rows + rows_per_thread - 1) / rows_per_thread) :
(((Dx.rows + rows_per_thread - 1) / rows_per_thread) / blockSizeY + 1) * blockSizeY;
size_t globalsize[2] = { globalSizeX, globalSizeY }, localsize[2] = { blockSizeX, blockSizeY };
return cornelKernel.run(2, globalsize, localsize, false);
}
static bool ocl_preCornerDetect( InputArray _src, OutputArray _dst, int ksize, int borderType, int depth )
{
UMat Dx, Dy, D2x, D2y, Dxy;
if (!extractCovData(_src, Dx, Dy, depth, 1, ksize, borderType))
return false;
Sobel( _src, D2x, CV_32F, 2, 0, ksize, 1, 0, borderType );
Sobel( _src, D2y, CV_32F, 0, 2, ksize, 1, 0, borderType );
Sobel( _src, Dxy, CV_32F, 1, 1, ksize, 1, 0, borderType );
_dst.create( _src.size(), CV_32FC1 );
UMat dst = _dst.getUMat();
double factor = 1 << (ksize - 1);
if( depth == CV_8U )
factor *= 255;
factor = 1./(factor * factor * factor);
ocl::Kernel k("preCornerDetect", ocl::imgproc::precornerdetect_oclsrc);
if (k.empty())
return false;
k.args(ocl::KernelArg::ReadOnlyNoSize(Dx), ocl::KernelArg::ReadOnlyNoSize(Dy),
ocl::KernelArg::ReadOnlyNoSize(D2x), ocl::KernelArg::ReadOnlyNoSize(D2y),
ocl::KernelArg::ReadOnlyNoSize(Dxy), ocl::KernelArg::WriteOnly(dst), (float)factor);
size_t globalsize[2] = { (size_t)dst.cols, (size_t)dst.rows };
return k.run(2, globalsize, NULL, false);
}
#endif
}
#if 0 //defined(HAVE_IPP)
namespace cv
{
static bool ipp_cornerMinEigenVal( InputArray _src, OutputArray _dst, int blockSize, int ksize, int borderType )
{
#if IPP_VERSION_X100 >= 800
CV_INSTRUMENT_REGION_IPP();
Mat src = _src.getMat();
_dst.create( src.size(), CV_32FC1 );
Mat dst = _dst.getMat();
{
typedef IppStatus (CV_STDCALL * ippiMinEigenValGetBufferSize)(IppiSize, int, int, int*);
typedef IppStatus (CV_STDCALL * ippiMinEigenVal)(const void*, int, Ipp32f*, int, IppiSize, IppiKernelType, int, int, Ipp8u*);
IppiKernelType kerType;
int kerSize = ksize;
if (ksize < 0)
{
kerType = ippKernelScharr;
kerSize = 3;
} else
{
kerType = ippKernelSobel;
}
bool isolated = (borderType & BORDER_ISOLATED) != 0;
int borderTypeNI = borderType & ~BORDER_ISOLATED;
if ((borderTypeNI == BORDER_REPLICATE && (!src.isSubmatrix() || isolated)) &&
(kerSize == 3 || kerSize == 5) && (blockSize == 3 || blockSize == 5))
{
ippiMinEigenValGetBufferSize getBufferSizeFunc = 0;
ippiMinEigenVal ippiMinEigenVal_C1R = 0;
float norm_coef = 0.f;
if (src.type() == CV_8UC1)
{
getBufferSizeFunc = (ippiMinEigenValGetBufferSize) ippiMinEigenValGetBufferSize_8u32f_C1R;
ippiMinEigenVal_C1R = (ippiMinEigenVal) ippiMinEigenVal_8u32f_C1R;
norm_coef = 1.f / 255.f;
} else if (src.type() == CV_32FC1)
{
getBufferSizeFunc = (ippiMinEigenValGetBufferSize) ippiMinEigenValGetBufferSize_32f_C1R;
ippiMinEigenVal_C1R = (ippiMinEigenVal) ippiMinEigenVal_32f_C1R;
norm_coef = 255.f;
}
norm_coef = kerType == ippKernelSobel ? norm_coef : norm_coef / 2.45f;
if (getBufferSizeFunc && ippiMinEigenVal_C1R)
{
int bufferSize;
IppiSize srcRoi = { src.cols, src.rows };
IppStatus ok = getBufferSizeFunc(srcRoi, kerSize, blockSize, &bufferSize);
if (ok >= 0)
{
AutoBuffer<uchar> buffer(bufferSize);
ok = CV_INSTRUMENT_FUN_IPP(ippiMinEigenVal_C1R, src.ptr(), (int) src.step, dst.ptr<Ipp32f>(), (int) dst.step, srcRoi, kerType, kerSize, blockSize, buffer.data());
CV_SUPPRESS_DEPRECATED_START
if (ok >= 0) ok = CV_INSTRUMENT_FUN_IPP(ippiMulC_32f_C1IR, norm_coef, dst.ptr<Ipp32f>(), (int) dst.step, srcRoi);
CV_SUPPRESS_DEPRECATED_END
if (ok >= 0)
{
CV_IMPL_ADD(CV_IMPL_IPP);
return true;
}
}
}
}
}
#else
CV_UNUSED(_src); CV_UNUSED(_dst); CV_UNUSED(blockSize); CV_UNUSED(borderType);
#endif
return false;
}
}
#endif
void cv::cornerMinEigenVal( InputArray _src, OutputArray _dst, int blockSize, int ksize, int borderType )
{
CV_INSTRUMENT_REGION();
CV_OCL_RUN(_src.dims() <= 2 && _dst.isUMat(),
ocl_cornerMinEigenValVecs(_src, _dst, blockSize, ksize, 0.0, borderType, MINEIGENVAL))
/*#ifdef HAVE_IPP
int kerSize = (ksize < 0)?3:ksize;
bool isolated = (borderType & BORDER_ISOLATED) != 0;
int borderTypeNI = borderType & ~BORDER_ISOLATED;
#endif
CV_IPP_RUN(((borderTypeNI == BORDER_REPLICATE && (!_src.isSubmatrix() || isolated)) &&
(kerSize == 3 || kerSize == 5) && (blockSize == 3 || blockSize == 5)) && IPP_VERSION_X100 >= 800,
ipp_cornerMinEigenVal( _src, _dst, blockSize, ksize, borderType ));
*/
Mat src = _src.getMat();
_dst.create( src.size(), CV_32FC1 );
Mat dst = _dst.getMat();
cornerEigenValsVecs( src, dst, blockSize, ksize, MINEIGENVAL, 0, borderType );
}
#if defined(HAVE_IPP)
namespace cv
{
static bool ipp_cornerHarris( Mat &src, Mat &dst, int blockSize, int ksize, double k, int borderType )
{
#if IPP_VERSION_X100 >= 810
CV_INSTRUMENT_REGION_IPP();
{
int type = src.type(), depth = CV_MAT_DEPTH(type), cn = CV_MAT_CN(type);
int borderTypeNI = borderType & ~BORDER_ISOLATED;
bool isolated = (borderType & BORDER_ISOLATED) != 0;
if ( (ksize == 3 || ksize == 5) && (type == CV_8UC1 || type == CV_32FC1) &&
(borderTypeNI == BORDER_CONSTANT || borderTypeNI == BORDER_REPLICATE) && cn == 1 && (!src.isSubmatrix() || isolated) )
{
IppiSize roisize = { src.cols, src.rows };
IppiMaskSize masksize = ksize == 5 ? ippMskSize5x5 : ippMskSize3x3;
IppDataType datatype = type == CV_8UC1 ? ipp8u : ipp32f;
Ipp32s bufsize = 0;
double scale = (double)(1 << ((ksize > 0 ? ksize : 3) - 1)) * blockSize;
if (ksize < 0)
scale *= 2.0;
if (depth == CV_8U)
scale *= 255.0;
scale = std::pow(scale, -4.0);
if (ippiHarrisCornerGetBufferSize(roisize, masksize, blockSize, datatype, cn, &bufsize) >= 0)
{
Ipp8u * buffer = (Ipp8u*)CV_IPP_MALLOC(bufsize);
IppiDifferentialKernel filterType = ksize > 0 ? ippFilterSobel : ippFilterScharr;
IppiBorderType borderTypeIpp = borderTypeNI == BORDER_CONSTANT ? ippBorderConst : ippBorderRepl;
IppStatus status = (IppStatus)-1;
if (depth == CV_8U)
status = CV_INSTRUMENT_FUN_IPP(ippiHarrisCorner_8u32f_C1R, (const Ipp8u *)src.data, (int)src.step, (Ipp32f *)dst.data, (int)dst.step, roisize,
filterType, masksize, blockSize, (Ipp32f)k, (Ipp32f)scale, borderTypeIpp, 0, buffer);
else if (depth == CV_32F)
status = CV_INSTRUMENT_FUN_IPP(ippiHarrisCorner_32f_C1R, (const Ipp32f *)src.data, (int)src.step, (Ipp32f *)dst.data, (int)dst.step, roisize,
filterType, masksize, blockSize, (Ipp32f)k, (Ipp32f)scale, borderTypeIpp, 0, buffer);
ippsFree(buffer);
if (status >= 0)
{
CV_IMPL_ADD(CV_IMPL_IPP);
return true;
}
}
}
}
#else
CV_UNUSED(src); CV_UNUSED(dst); CV_UNUSED(blockSize); CV_UNUSED(ksize); CV_UNUSED(k); CV_UNUSED(borderType);
#endif
return false;
}
}
#endif
void cv::cornerHarris( InputArray _src, OutputArray _dst, int blockSize, int ksize, double k, int borderType )
{
CV_INSTRUMENT_REGION();
CV_OCL_RUN(_src.dims() <= 2 && _dst.isUMat(),
ocl_cornerMinEigenValVecs(_src, _dst, blockSize, ksize, k, borderType, HARRIS))
Mat src = _src.getMat();
_dst.create( src.size(), CV_32FC1 );
Mat dst = _dst.getMat();
#ifdef HAVE_IPP
int borderTypeNI = borderType & ~BORDER_ISOLATED;
bool isolated = (borderType & BORDER_ISOLATED) != 0;
#endif
CV_IPP_RUN(((ksize == 3 || ksize == 5) && (_src.type() == CV_8UC1 || _src.type() == CV_32FC1) &&
(borderTypeNI == BORDER_CONSTANT || borderTypeNI == BORDER_REPLICATE) && CV_MAT_CN(_src.type()) == 1 &&
(!_src.isSubmatrix() || isolated)) && IPP_VERSION_X100 >= 810, ipp_cornerHarris( src, dst, blockSize, ksize, k, borderType ));
cornerEigenValsVecs( src, dst, blockSize, ksize, HARRIS, k, borderType );
}
void cv::cornerEigenValsAndVecs( InputArray _src, OutputArray _dst, int blockSize, int ksize, int borderType )
{
CV_INSTRUMENT_REGION();
Mat src = _src.getMat();
Size dsz = _dst.size();
int dtype = _dst.type();
if( dsz.height != src.rows || dsz.width*CV_MAT_CN(dtype) != src.cols*6 || CV_MAT_DEPTH(dtype) != CV_32F )
_dst.create( src.size(), CV_32FC(6) );
Mat dst = _dst.getMat();
cornerEigenValsVecs( src, dst, blockSize, ksize, EIGENVALSVECS, 0, borderType );
}
void cv::preCornerDetect( InputArray _src, OutputArray _dst, int ksize, int borderType )
{
CV_INSTRUMENT_REGION();
int type = _src.type();
CV_Assert( type == CV_8UC1 || type == CV_32FC1 );
CV_OCL_RUN( _src.dims() <= 2 && _dst.isUMat(),
ocl_preCornerDetect(_src, _dst, ksize, borderType, CV_MAT_DEPTH(type)))
Mat Dx, Dy, D2x, D2y, Dxy, src = _src.getMat();
_dst.create( src.size(), CV_32FC1 );
Mat dst = _dst.getMat();
Sobel( src, Dx, CV_32F, 1, 0, ksize, 1, 0, borderType );
Sobel( src, Dy, CV_32F, 0, 1, ksize, 1, 0, borderType );
Sobel( src, D2x, CV_32F, 2, 0, ksize, 1, 0, borderType );
Sobel( src, D2y, CV_32F, 0, 2, ksize, 1, 0, borderType );
Sobel( src, Dxy, CV_32F, 1, 1, ksize, 1, 0, borderType );
double factor = 1 << (ksize - 1);
if( src.depth() == CV_8U )
factor *= 255;
factor = 1./(factor * factor * factor);
#if CV_SIMD128
float factor_f = (float)factor;
v_float32x4 v_factor = v_setall_f32(factor_f), v_m2 = v_setall_f32(-2.0f);
#endif
Size size = src.size();
int i, j;
for( i = 0; i < size.height; i++ )
{
float* dstdata = dst.ptr<float>(i);
const float* dxdata = Dx.ptr<float>(i);
const float* dydata = Dy.ptr<float>(i);
const float* d2xdata = D2x.ptr<float>(i);
const float* d2ydata = D2y.ptr<float>(i);
const float* dxydata = Dxy.ptr<float>(i);
j = 0;
#if CV_SIMD128
{
for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
{
v_float32x4 v_dx = v_load(dxdata + j);
v_float32x4 v_dy = v_load(dydata + j);
v_float32x4 v_s1 = (v_dx * v_dx) * v_load(d2ydata + j);
v_float32x4 v_s2 = v_muladd((v_dy * v_dy), v_load(d2xdata + j), v_s1);
v_float32x4 v_s3 = v_muladd((v_dy * v_dx) * v_load(dxydata + j), v_m2, v_s2);
v_store(dstdata + j, v_s3 * v_factor);
}
}
#endif
for( ; j < size.width; j++ )
{
float dx = dxdata[j];
float dy = dydata[j];
dstdata[j] = (float)(factor*(dx*dx*d2ydata[j] + dy*dy*d2xdata[j] - 2*dx*dy*dxydata[j]));
}
}
}
CV_IMPL void
cvCornerMinEigenVal( const CvArr* srcarr, CvArr* dstarr,
int block_size, int aperture_size )
{
cv::Mat src = cv::cvarrToMat(srcarr), dst = cv::cvarrToMat(dstarr);
CV_Assert( src.size() == dst.size() && dst.type() == CV_32FC1 );
cv::cornerMinEigenVal( src, dst, block_size, aperture_size, cv::BORDER_REPLICATE );
}
CV_IMPL void
cvCornerHarris( const CvArr* srcarr, CvArr* dstarr,
int block_size, int aperture_size, double k )
{
cv::Mat src = cv::cvarrToMat(srcarr), dst = cv::cvarrToMat(dstarr);
CV_Assert( src.size() == dst.size() && dst.type() == CV_32FC1 );
cv::cornerHarris( src, dst, block_size, aperture_size, k, cv::BORDER_REPLICATE );
}
CV_IMPL void
cvCornerEigenValsAndVecs( const void* srcarr, void* dstarr,
int block_size, int aperture_size )
{
cv::Mat src = cv::cvarrToMat(srcarr), dst = cv::cvarrToMat(dstarr);
CV_Assert( src.rows == dst.rows && src.cols*6 == dst.cols*dst.channels() && dst.depth() == CV_32F );
cv::cornerEigenValsAndVecs( src, dst, block_size, aperture_size, cv::BORDER_REPLICATE );
}
CV_IMPL void
cvPreCornerDetect( const void* srcarr, void* dstarr, int aperture_size )
{
cv::Mat src = cv::cvarrToMat(srcarr), dst = cv::cvarrToMat(dstarr);
CV_Assert( src.size() == dst.size() && dst.type() == CV_32FC1 );
cv::preCornerDetect( src, dst, aperture_size, cv::BORDER_REPLICATE );
}
/* End of file */