mirror/opencv
1
0
Fork 0
mirror of https://github.com/opencv/opencv.git synced 2025-01-18 14:13:15 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix subpixel problem of akaze.

Browse Source 
This is found in the original akaze repo. Previous sub pixel localization method assumes the coordinate (0, 0) is the up-left corner of the up-left pixel. But as far as I know, opencv uses the center of the up-left corner, in this case it should be done in this way.

35aeb83a71
db3dc22981
This commit is contained in:
Han Hu 2016-05-20 11:45:46 +08:00
parent c3d1f94ee6
commit e646f9d2f1
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
modules/features2d/src/kaze/AKAZEFeatures.cpp
View File

@ -342,14 +342,14 @@ void AKAZEFeatures::Find_Scale_Space_Extrema(std::vector<KeyPoint>& kpts)
if (is_out == false) {
if (is_repeated == false) {
point.pt.x *= ratio;
point.pt.y *= ratio;
point.pt.x = (float)(point.pt.x*ratio + .5*(ratio-1.0));
point.pt.y = (float)(point.pt.y*ratio + .5*(ratio-1.0));
kpts_aux.push_back(point);
npoints++;
}
else {
point.pt.x *= ratio;
point.pt.y *= ratio;
point.pt.x = (float)(point.pt.x*ratio + .5*(ratio-1.0));
point.pt.y = (float)(point.pt.y*ratio + .5*(ratio-1.0));
kpts_aux[id_repeated] = point;
}
} // if is_out
@ -439,8 +439,8 @@ void AKAZEFeatures::Do_Subpixel_Refinement(std::vector<KeyPoint>& kpts)
kpts[i].pt.x = x + dst(0);
kpts[i].pt.y = y + dst(1);
int power = fastpow(2, evolution_[kpts[i].class_id].octave);
kpts[i].pt.x *= power;
kpts[i].pt.y *= power;
kpts[i].pt.x = (float)(kpts[i].pt.x*power + .5*(power-1));
kpts[i].pt.y = (float)(kpts[i].pt.y*power + .5*(power-1));
kpts[i].angle = 0.0;
// In OpenCV the size of a keypoint its the diameter