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Add Thickness parameter in drawMatches function

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This commit adds the feature of selecting the thickness
of the matches drawn by the drawMatches function.

In larger images, the default thickness of 1 pixel creates images
that are hard to visualize.
pull/20232/head
Tiago De Gaspari 4 years ago
parent 61e30c15a9
commit 411fd2b761
2 changed files with 28 additions and 4 deletions
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  1. 7
      modules/features2d/include/opencv2/features2d.hpp
  2. 25
      modules/features2d/src/draw.cpp

7
modules/features2d/include/opencv2/features2d.hpp
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@ -1314,6 +1314,13 @@ CV_EXPORTS_W void drawMatches( InputArray img1, const std::vector<KeyPoint>& key
const std::vector<char>& matchesMask=std::vector<char>(), int flags=DrawMatchesFlags::DEFAULT );
/** @overload */
CV_EXPORTS_W void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
InputArray img2, const std::vector<KeyPoint>& keypoints2,
const std::vector<DMatch>& matches1to2, InputOutputArray outImg,
const int matchesThickness, const Scalar& matchColor=Scalar::all(-1),
const Scalar& singlePointColor=Scalar::all(-1), const std::vector<char>& matchesMask=std::vector<char>(),
int flags=DrawMatchesFlags::DEFAULT );
CV_EXPORTS_AS(drawMatchesKnn) void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
InputArray img2, const std::vector<KeyPoint>& keypoints2,
const std::vector<std::vector<DMatch> >& matches1to2, InputOutputArray outImg,

25
modules/features2d/src/draw.cpp
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@ -183,7 +183,8 @@ static void _prepareImgAndDrawKeypoints( InputArray img1, const std::vector<KeyP
}
static inline void _drawMatch( InputOutputArray outImg, InputOutputArray outImg1, InputOutputArray outImg2 ,
const KeyPoint& kp1, const KeyPoint& kp2, const Scalar& matchColor, int flags )
const KeyPoint& kp1, const KeyPoint& kp2, const Scalar& matchColor, int flags,
const int matchesThickness )
{
RNG& rng = theRNG();
bool isRandMatchColor = matchColor == Scalar::all(-1);
@ -199,7 +200,7 @@ static inline void _drawMatch( InputOutputArray outImg, InputOutputArray outImg1
line( outImg,
Point(cvRound(pt1.x*draw_multiplier), cvRound(pt1.y*draw_multiplier)),
Point(cvRound(dpt2.x*draw_multiplier), cvRound(dpt2.y*draw_multiplier)),
color, 1, LINE_AA, draw_shift_bits );
color, matchesThickness, LINE_AA, draw_shift_bits );
}
void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
@ -207,6 +208,21 @@ void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
const std::vector<DMatch>& matches1to2, InputOutputArray outImg,
const Scalar& matchColor, const Scalar& singlePointColor,
const std::vector<char>& matchesMask, int flags )
{
drawMatches( img1, keypoints1,
img2, keypoints2,
matches1to2, outImg,
1, matchColor,
singlePointColor, matchesMask,
flags);
}
void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
InputArray img2, const std::vector<KeyPoint>& keypoints2,
const std::vector<DMatch>& matches1to2, InputOutputArray outImg,
const int matchesThickness, const Scalar& matchColor,
const Scalar& singlePointColor, const std::vector<char>& matchesMask,
int flags )
{
if( !matchesMask.empty() && matchesMask.size() != matches1to2.size() )
CV_Error( Error::StsBadSize, "matchesMask must have the same size as matches1to2" );
@ -226,11 +242,12 @@ void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
CV_Assert(i2 >= 0 && i2 < static_cast<int>(keypoints2.size()));
const KeyPoint &kp1 = keypoints1[i1], &kp2 = keypoints2[i2];
_drawMatch( outImg, outImg1, outImg2, kp1, kp2, matchColor, flags );
_drawMatch( outImg, outImg1, outImg2, kp1, kp2, matchColor, flags, matchesThickness );
}
}
}
void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
InputArray img2, const std::vector<KeyPoint>& keypoints2,
const std::vector<std::vector<DMatch> >& matches1to2, InputOutputArray outImg,
@ -254,7 +271,7 @@ void drawMatches( InputArray img1, const std::vector<KeyPoint>& keypoints1,
if( matchesMask.empty() || matchesMask[i][j] )
{
const KeyPoint &kp1 = keypoints1[i1], &kp2 = keypoints2[i2];
_drawMatch( outImg, outImg1, outImg2, kp1, kp2, matchColor, flags );
_drawMatch( outImg, outImg1, outImg2, kp1, kp2, matchColor, flags, 1 );
}
}
}

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