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(3.4) xfeatures2d: validate keypoints mask for SURF #1888

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Merged
merged 1 commit into from
Nov 9, 2018
Merged

(3.4) xfeatures2d: validate keypoints mask for SURF #1888

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13 changes: 13 additions & 0 deletions modules/xfeatures2d/src/surf.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -944,6 +944,19 @@ void SURF_Impl::detectAndCompute(InputArray _img, InputArray _mask,
integral(mask1, msum, CV_32S);
}
fastHessianDetector( sum, msum, keypoints, nOctaves, nOctaveLayers, (float)hessianThreshold );
if (!mask.empty())
{
for (size_t i = 0; i < keypoints.size(); )
{
Point pt(keypoints[i].pt);
if (mask.at<uchar>(pt.y, pt.x) == 0)
{
keypoints.erase(keypoints.begin() + i);
continue; // keep "i"
}
i++;
}
}
}

int i, j, N = (int)keypoints.size();
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