generic-library/opencv
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parallel version

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This commit is contained in:
Ilya Lavrenov 2014-04-10 00:01:10 +04:00
parent 18ef25ec30
commit b970ec7dae
1 changed files with 55 additions and 7 deletions
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62
modules/imgproc/src/histogram.cpp
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@ -1175,6 +1175,48 @@ calcHist_8u( std::vector<uchar*>& _ptrs, const std::vector<int>& _deltas,
}
}
#if defined HAVE_IPP && !defined HAVE_IPP_ICV_ONLY
class IPPCalcHistInvoker :
public ParallelLoopBody
{
public:
IPPCalcHistInvoker(const Mat & _src, Mat & _hist, AutoBuffer<Ipp32s> & _levels, Ipp32s _histSize, Ipp32s _low, Ipp32s _high, bool * _ok) :
ParallelLoopBody(), src(&_src), hist(&_hist), levels(&_levels), histSize(_histSize), low(_low), high(_high), ok(_ok)
{
*ok = true;
}
virtual void operator() (const Range & range) const
{
Mat phist(hist->size(), hist->type(), Scalar::all(0));
IppStatus status = ippiHistogramEven_8u_C1R(
src->data + src->step * range.start, (int)src->step, ippiSize(src->cols, range.end - range.start),
(Ipp32s *)phist.data, (Ipp32s *)*levels, histSize, low, high);
if (status < 0)
{
*ok = false;
return;
}
for (int i = 0; i < histSize; ++i)
CV_XADD((int *)(hist->data + i * hist->step), *(int *)(phist.data + i * phist.step));
}
private:
const Mat * src;
Mat * hist;
AutoBuffer<Ipp32s> * levels;
Ipp32s histSize, low, high;
bool * ok;
const IPPCalcHistInvoker & operator = (const IPPCalcHistInvoker & );
};
#endif
}
void cv::calcHist( const Mat* images, int nimages, const int* channels,
@ -1190,19 +1232,25 @@ void cv::calcHist( const Mat* images, int nimages, const int* channels,
Mat hist = _hist.getMat(), ihist = hist;
ihist.flags = (ihist.flags & ~CV_MAT_TYPE_MASK)|CV_32S;
#ifdef HAVE_IPP
#if defined HAVE_IPP && !defined HAVE_IPP_ICV_ONLY
if (nimages == 1 && images[0].type() == CV_8UC1 && dims == 1 && channels &&
channels[0] == 0 && mask.empty() && images[0].dims <= 2 &&
!accumulate && uniform)
{
hist.setTo(Scalar::all(0));
ihist.setTo(Scalar::all(0));
AutoBuffer<Ipp32s> levels(histSize[0] + 1);
IppStatus status =
ippiHistogramEven_8u_C1R(
(const Ipp8u *)images[0].data, (int)images[0].step, ippiSize(images[0].size()),
(Ipp32s *)ihist.data, (Ipp32s *)levels, histSize[0] + 1, (Ipp32s)ranges[0][0], (Ipp32s)ranges[0][1]);
if (status >= 0)
bool ok = true;
const Mat & src = images[0];
int nstripes = std::min<int>(8, src.total() / (1 << 16));
#ifdef HAVE_CONCURRENCY
nstripes = 1;
#endif
IPPCalcHistInvoker invoker(src, ihist, levels, histSize[0] + 1, (Ipp32s)ranges[0][0], (Ipp32s)ranges[0][1], &ok);
Range range(0, src.rows);
parallel_for_(range, invoker, nstripes);
if (ok)
{
ihist.convertTo(hist, CV_32F);
return;