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#1349 tbb::mutex is moved to outer scope to be sure that its initialization is completed before the parallel loop

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This commit is contained in:
Andrey Kamaev 2012-03-29 11:17:35 +00:00
parent 4eda1662aa
commit 8f970caa56
1 changed files with 19 additions and 11 deletions
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30
modules/nonfree/src/surf.cpp
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@ -257,10 +257,14 @@ interpolateKeypoint( float N9[3][9], int dx, int dy, int ds, KeyPoint& kpt )
return ok;
}
#ifdef HAVE_TBB
static tbb::mutex findMaximaInLayer_m;
#endif
/*
* Find the maxima in the determinant of the Hessian in a layer of the
* Find the maxima in the determinant of the Hessian in a layer of the
* scale-space pyramid
*/
*/
static void
findMaximaInLayer( const Mat& sum, const Mat& mask_sum,
const vector<Mat>& dets, const vector<Mat>& traces,
@ -279,13 +283,13 @@ findMaximaInLayer( const Mat& sum, const Mat& mask_sum,
int layer_cols = (sum.cols-1)/sampleStep;
// Ignore pixels without a 3x3x3 neighbourhood in the layer above
int margin = (sizes[layer+1]/2)/sampleStep+1;
int margin = (sizes[layer+1]/2)/sampleStep+1;
if( !mask_sum.empty() )
resizeHaarPattern( dm, &Dm, NM, 9, size, mask_sum.cols );
int step = (int)(dets[layer].step/dets[layer].elemSize());
for( int i = margin; i < layer_rows - margin; i++ )
{
const float* det_ptr = dets[layer].ptr<float>(i);
@ -295,15 +299,15 @@ findMaximaInLayer( const Mat& sum, const Mat& mask_sum,
float val0 = det_ptr[j];
if( val0 > hessianThreshold )
{
/* Coordinates for the start of the wavelet in the sum image. There
/* Coordinates for the start of the wavelet in the sum image. There
is some integer division involved, so don't try to simplify this
(cancel out sampleStep) without checking the result is the same */
int sum_i = sampleStep*(i-(size/2)/sampleStep);
int sum_j = sampleStep*(j-(size/2)/sampleStep);
/* The 3x3x3 neighbouring samples around the maxima.
/* The 3x3x3 neighbouring samples around the maxima.
The maxima is included at N9[1][4] */
const float *det1 = &dets[layer-1].at<float>(i, j);
const float *det2 = &dets[layer].at<float>(i, j);
const float *det3 = &dets[layer+1].at<float>(i, j);
@ -352,10 +356,9 @@ findMaximaInLayer( const Mat& sum, const Mat& mask_sum,
if( interp_ok )
{
/*printf( "KeyPoint %f %f %d\n", point.pt.x, point.pt.y, point.size );*/
#ifdef HAVE_TBB
static tbb::mutex m;
tbb::mutex::scoped_lock lock(m);
#endif
#ifdef HAVE_TBB
tbb::mutex::scoped_lock lock(findMaximaInLayer_m);
#endif
keypoints.push_back(kpt);
}
}
@ -411,6 +414,11 @@ struct SURFFindInvoker
keypoints = &_keypoints;
nOctaveLayers = _nOctaveLayers;
hessianThreshold = _hessianThreshold;
#ifdef HAVE_TBB
//touch the mutex to ensure that it's initialization is finished
CV_Assert(&findMaximaInLayer_m > 0);
#endif
}
void operator()(const BlockedRange& range) const