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added KeyPoint::hash() (ticket #1100)

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This commit is contained in:
Vadim Pisarevsky
2011-05-31 14:24:45 +00:00
parent 63dc1cdd2c
commit af2af3af9b
2 changed files with 18 additions and 2 deletions
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15
modules/features2d/src/keypoint.cpp
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@@ -43,7 +43,20 @@
namespace cv
{
size_t KeyPoint::hash() const
{
size_t _Val = 2166136261U, scale = 16777619U;
Cv32suf u;
u.f = pt.x; _Val = (scale * _Val) ^ u.u;
u.f = pt.y; _Val = (scale * _Val) ^ u.u;
u.f = size; _Val = (scale * _Val) ^ u.u;
u.f = angle; _Val = (scale * _Val) ^ u.u;
u.f = response; _Val = (scale * _Val) ^ u.u;
_Val = (scale * _Val) ^ ((size_t) octave);
_Val = (scale * _Val) ^ ((size_t) class_id);
return _Val;
}
void write(FileStorage& fs, const string& objname, const vector<KeyPoint>& keypoints)
{