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opencv/modules/core/src/lut.cpp at master · pythonmjs/opencv · GitHub

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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 "precomp.hpp"

#include "opencl_kernels_core.hpp"

#include "convert.hpp"

#include "opencv2/core/openvx/ovx_defs.hpp"

/****************************************************************************************\

* LUT Transform *

\****************************************************************************************/

namespace cv

{

template<typename T> static void

LUT8u_( const uchar* src, const T* lut, T* dst, int len, int cn, int lutcn )

{

if( lutcn == 1 )

{

for( int i = 0; i < len*cn; i++ )

dst[i] = lut[src[i]];

}

else

{

for( int i = 0; i < len*cn; i += cn )

for( int k = 0; k < cn; k++ )

dst[i+k] = lut[src[i+k]*cn+k];

}

}

static void LUT8u_8u( const uchar* src, const uchar* lut, uchar* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_8s( const uchar* src, const schar* lut, schar* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_16u( const uchar* src, const ushort* lut, ushort* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_16s( const uchar* src, const short* lut, short* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_32s( const uchar* src, const int* lut, int* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_32f( const uchar* src, const float* lut, float* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

static void LUT8u_64f( const uchar* src, const double* lut, double* dst, int len, int cn, int lutcn )

{

LUT8u_( src, lut, dst, len, cn, lutcn );

}

typedef void (*LUTFunc)( const uchar* src, const uchar* lut, uchar* dst, int len, int cn, int lutcn );

static LUTFunc lutTab[] =

{

(LUTFunc)LUT8u_8u, (LUTFunc)LUT8u_8s, (LUTFunc)LUT8u_16u, (LUTFunc)LUT8u_16s,

(LUTFunc)LUT8u_32s, (LUTFunc)LUT8u_32f, (LUTFunc)LUT8u_64f, 0

};

#ifdef HAVE_OPENCL

static bool ocl_LUT(InputArray _src, InputArray _lut, OutputArray _dst)

{

int lcn = _lut.channels(), dcn = _src.channels(), ddepth = _lut.depth();

UMat src = _src.getUMat(), lut = _lut.getUMat();

_dst.create(src.size(), CV_MAKETYPE(ddepth, dcn));

UMat dst = _dst.getUMat();

int kercn = lcn == 1 ? std::min(4, ocl::predictOptimalVectorWidth(_src, _dst)) : dcn;

ocl::Kernel k("LUT", ocl::core::lut_oclsrc,

format("-D dcn=%d -D lcn=%d -D srcT=%s -D dstT=%s", kercn, lcn,

ocl::typeToStr(src.depth()), ocl::memopTypeToStr(ddepth)));

if (k.empty())

return false;

k.args(ocl::KernelArg::ReadOnlyNoSize(src), ocl::KernelArg::ReadOnlyNoSize(lut),

ocl::KernelArg::WriteOnly(dst, dcn, kercn));

size_t globalSize[2] = { (size_t)dst.cols * dcn / kercn, ((size_t)dst.rows + 3) / 4 };

return k.run(2, globalSize, NULL, false);

}

#endif

#ifdef HAVE_OPENVX

static bool openvx_LUT(Mat src, Mat dst, Mat _lut)

{

if (src.type() != CV_8UC1 || dst.type() != src.type() || _lut.type() != src.type() || !_lut.isContinuous())

return false;

try

{

ivx::Context ctx = ovx::getOpenVXContext();

ivx::Image

ia = ivx::Image::createFromHandle(ctx, VX_DF_IMAGE_U8,

ivx::Image::createAddressing(src.cols, src.rows, 1, (vx_int32)(src.step)), src.data),

ib = ivx::Image::createFromHandle(ctx, VX_DF_IMAGE_U8,

ivx::Image::createAddressing(dst.cols, dst.rows, 1, (vx_int32)(dst.step)), dst.data);

ivx::LUT lut = ivx::LUT::create(ctx);

lut.copyFrom(_lut);

ivx::IVX_CHECK_STATUS(vxuTableLookup(ctx, ia, lut, ib));

}

catch (ivx::RuntimeError & e)

{

VX_DbgThrow(e.what());

}

catch (ivx::WrapperError & e)

{

VX_DbgThrow(e.what());

}

return true;

}

#endif

#if defined(HAVE_IPP)

#if !IPP_DISABLE_PERF_LUT // there are no performance benefits (PR #2653)

namespace ipp {

class IppLUTParallelBody_LUTC1 : public ParallelLoopBody

{

public:

bool* ok;

const Mat& src_;

const Mat& lut_;

Mat& dst_;

int width;

size_t elemSize1;

IppLUTParallelBody_LUTC1(const Mat& src, const Mat& lut, Mat& dst, bool* _ok)

: ok(_ok), src_(src), lut_(lut), dst_(dst)

{

width = dst.cols * dst.channels();

elemSize1 = CV_ELEM_SIZE1(dst.depth());

CV_DbgAssert(elemSize1 == 1 || elemSize1 == 4);

*ok = true;

}

void operator()( const cv::Range& range ) const

{

if (!*ok)

return;

const int row0 = range.start;

const int row1 = range.end;

Mat src = src_.rowRange(row0, row1);

Mat dst = dst_.rowRange(row0, row1);

IppiSize sz = { width, dst.rows };

if (elemSize1 == 1)

{

if (CV_INSTRUMENT_FUN_IPP(ippiLUTPalette_8u_C1R, (const Ipp8u*)src.data, (int)src.step[0], dst.data, (int)dst.step[0], sz, lut_.data, 8) >= 0)

return;

}

else if (elemSize1 == 4)

{

if (CV_INSTRUMENT_FUN_IPP(ippiLUTPalette_8u32u_C1R, (const Ipp8u*)src.data, (int)src.step[0], (Ipp32u*)dst.data, (int)dst.step[0], sz, (Ipp32u*)lut_.data, 8) >= 0)

return;

}

*ok = false;

}

private:

IppLUTParallelBody_LUTC1(const IppLUTParallelBody_LUTC1&);

IppLUTParallelBody_LUTC1& operator=(const IppLUTParallelBody_LUTC1&);

};

class IppLUTParallelBody_LUTCN : public ParallelLoopBody

{

public:

bool *ok;

const Mat& src_;

const Mat& lut_;

Mat& dst_;

int lutcn;

uchar* lutBuffer;

uchar* lutTable[4];

IppLUTParallelBody_LUTCN(const Mat& src, const Mat& lut, Mat& dst, bool* _ok)

: ok(_ok), src_(src), lut_(lut), dst_(dst), lutBuffer(NULL)

{

lutcn = lut.channels();

IppiSize sz256 = {256, 1};

size_t elemSize1 = dst.elemSize1();

CV_DbgAssert(elemSize1 == 1);

lutBuffer = (uchar*)CV_IPP_MALLOC(256 * (int)elemSize1 * 4);

lutTable[0] = lutBuffer + 0;

lutTable[1] = lutBuffer + 1 * 256 * elemSize1;

lutTable[2] = lutBuffer + 2 * 256 * elemSize1;

lutTable[3] = lutBuffer + 3 * 256 * elemSize1;

CV_DbgAssert(lutcn == 3 || lutcn == 4);

if (lutcn == 3)

{

IppStatus status = CV_INSTRUMENT_FUN_IPP(ippiCopy_8u_C3P3R, lut.ptr(), (int)lut.step[0], lutTable, (int)lut.step[0], sz256);

if (status < 0)

return;

}

else if (lutcn == 4)

{

IppStatus status = CV_INSTRUMENT_FUN_IPP(ippiCopy_8u_C4P4R, lut.ptr(), (int)lut.step[0], lutTable, (int)lut.step[0], sz256);

if (status < 0)

return;

}

*ok = true;

}

~IppLUTParallelBody_LUTCN()

{

if (lutBuffer != NULL)

ippFree(lutBuffer);

lutBuffer = NULL;

lutTable[0] = NULL;

}

void operator()( const cv::Range& range ) const

{

if (!*ok)

return;

const int row0 = range.start;

const int row1 = range.end;

Mat src = src_.rowRange(row0, row1);

Mat dst = dst_.rowRange(row0, row1);

if (lutcn == 3)

{

if (CV_INSTRUMENT_FUN_IPP(ippiLUTPalette_8u_C3R, src.ptr(), (int)src.step[0], dst.ptr(), (int)dst.step[0], ippiSize(dst.size()), lutTable, 8) >= 0)

return;

}

else if (lutcn == 4)

{

if (CV_INSTRUMENT_FUN_IPP(ippiLUTPalette_8u_C4R, src.ptr(), (int)src.step[0], dst.ptr(), (int)dst.step[0], ippiSize(dst.size()), lutTable, 8) >= 0)

return;

}

*ok = false;

}

private:

IppLUTParallelBody_LUTCN(const IppLUTParallelBody_LUTCN&);

IppLUTParallelBody_LUTCN& operator=(const IppLUTParallelBody_LUTCN&);

};

} // namespace ipp

static bool ipp_lut(Mat &src, Mat &lut, Mat &dst)

{

CV_INSTRUMENT_REGION_IPP()

int lutcn = lut.channels();

if(src.dims > 2)

return false;

bool ok = false;

Ptr<ParallelLoopBody> body;

size_t elemSize1 = CV_ELEM_SIZE1(dst.depth());

if (lutcn == 1)

{

ParallelLoopBody* p = new ipp::IppLUTParallelBody_LUTC1(src, lut, dst, &ok);

body.reset(p);

}

else if ((lutcn == 3 || lutcn == 4) && elemSize1 == 1)

{

ParallelLoopBody* p = new ipp::IppLUTParallelBody_LUTCN(src, lut, dst, &ok);

body.reset(p);

}

if (body != NULL && ok)

{

Range all(0, dst.rows);

if (dst.total()>>18)

parallel_for_(all, *body, (double)std::max((size_t)1, dst.total()>>16));

else

(*body)(all);

if (ok)

return true;

}

return false;

}

#endif

#endif // IPP

class LUTParallelBody : public ParallelLoopBody

{

public:

bool* ok;

const Mat& src_;

const Mat& lut_;

Mat& dst_;

LUTFunc func;

LUTParallelBody(const Mat& src, const Mat& lut, Mat& dst, bool* _ok)

: ok(_ok), src_(src), lut_(lut), dst_(dst)

{

func = lutTab[lut.depth()];

*ok = (func != NULL);

}

void operator()( const cv::Range& range ) const CV_OVERRIDE

{

CV_DbgAssert(*ok);

const int row0 = range.start;

const int row1 = range.end;

Mat src = src_.rowRange(row0, row1);

Mat dst = dst_.rowRange(row0, row1);

int cn = src.channels();

int lutcn = lut_.channels();

const Mat* arrays[] = {&src, &dst, 0};

uchar* ptrs[2];

NAryMatIterator it(arrays, ptrs);

int len = (int)it.size;

for( size_t i = 0; i < it.nplanes; i++, ++it )

func(ptrs[0], lut_.ptr(), ptrs[1], len, cn, lutcn);

}

private:

LUTParallelBody(const LUTParallelBody&);

LUTParallelBody& operator=(const LUTParallelBody&);

};

} // cv::

void cv::LUT( InputArray _src, InputArray _lut, OutputArray _dst )

{

CV_INSTRUMENT_REGION()

int cn = _src.channels(), depth = _src.depth();

int lutcn = _lut.channels();

CV_Assert( (lutcn == cn || lutcn == 1) &&

_lut.total() == 256 && _lut.isContinuous() &&

(depth == CV_8U || depth == CV_8S) );

CV_OCL_RUN(_dst.isUMat() && _src.dims() <= 2,

ocl_LUT(_src, _lut, _dst))

Mat src = _src.getMat(), lut = _lut.getMat();

_dst.create(src.dims, src.size, CV_MAKETYPE(_lut.depth(), cn));

Mat dst = _dst.getMat();

CV_OVX_RUN(!ovx::skipSmallImages<VX_KERNEL_TABLE_LOOKUP>(src.cols, src.rows),

openvx_LUT(src, dst, lut))

#if !IPP_DISABLE_PERF_LUT

CV_IPP_RUN(_src.dims() <= 2, ipp_lut(src, lut, dst));

#endif

if (_src.dims() <= 2)

{

bool ok = false;

Ptr<ParallelLoopBody> body;

if (body == NULL || ok == false)

{

ok = false;

ParallelLoopBody* p = new LUTParallelBody(src, lut, dst, &ok);

body.reset(p);

}

if (body != NULL && ok)

{

Range all(0, dst.rows);

if (dst.total()>>18)

parallel_for_(all, *body, (double)std::max((size_t)1, dst.total()>>16));

else

(*body)(all);

if (ok)

return;

}

}

LUTFunc func = lutTab[lut.depth()];

CV_Assert( func != 0 );

const Mat* arrays[] = {&src, &dst, 0};

uchar* ptrs[2];

NAryMatIterator it(arrays, ptrs);

int len = (int)it.size;

for( size_t i = 0; i < it.nplanes; i++, ++it )

func(ptrs[0], lut.ptr(), ptrs[1], len, cn, lutcn);

}

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