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features2d: don't use rand(), because it is not thread-safe

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Results are not stable with srand()
This commit is contained in:
Alexander Alekhin 2017-08-02 23:48:54 +03:00
parent 0bd357e7ec
commit 8be1ba708e
1 changed files with 2 additions and 2 deletions
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4
modules/features2d/src/kaze/AKAZEFeatures.cpp
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@ -2077,7 +2077,7 @@ void generateDescriptorSubsample(Mat& sampleList, Mat& comparisons, int nbits,
}
}
srand(1024);
RNG rng(1024);
Mat_<int> comps = Mat_<int>(nchannels * (int)ceil(nbits / (float)nchannels), 2);
comps = 1000;
@ -2089,7 +2089,7 @@ void generateDescriptorSubsample(Mat& sampleList, Mat& comparisons, int nbits,
samples = -1;
for (int i = 0; i < npicks; i++) {
int k = rand() % (fullM.rows - i);
int k = rng(fullM.rows - i);
if (i < 6) {
// Force use of the coarser grid values and comparisons
k = i;