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Affine feature2D - Bug fix #1463

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Merged
opencv-pushbot merged 1 commit into from Nov 27, 2017
Merged

Affine feature2D - Bug fix #1463

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7 changes: 6 additions & 1 deletion modules/xfeatures2d/src/affine_feature2d.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -170,6 +170,10 @@ bool calcAffineAdaptation(const Mat & fimage, Elliptic_KeyPoint & keypoint)
//Differentation scale selection
selDifferentiationScale(warpedImg, Lxm2smooth, Lxmysmooth, Lym2smooth, si,
Point(cx, cy));
if (Lym2smooth.empty()) {
divergence = true;
continue;
}

//Spatial Localization
cxPr = cx; //Previous iteration point in normalized window
Expand Down Expand Up @@ -428,7 +432,8 @@ float selDifferentiationScale(const Mat & img, Mat & Lxm2smooth, Mat & Lxmysmoot
eigen(M, eval);
double eval1 = std::abs(eval.at<float> (0, 0));
double eval2 = std::abs(eval.at<float> (1, 0));
double q = min(eval1, eval2) / max(eval1, eval2);
double m = max(eval1, eval2);
double q = (m == 0) ? -1 : min(eval1, eval2) / m;

if (q >= qMax)
{
Expand Down