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fixed canny test; fixed mhi-global test & implementation (hopefully, for the last time); added sse 4.1 & 4.2 support (not working in Xcode for some reason); moved splineInterpolation to color.cpp; fixed a few bugs in documentation

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This commit is contained in:
Vadim Pisarevsky
2010-11-24 09:46:46 +00:00
parent 0e43976259
commit d366c0b2fa
9 changed files with 452 additions and 750 deletions
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34
modules/core/include/opencv2/core/operations.hpp
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@@ -3206,41 +3206,7 @@ partition( const vector<_Tp>& _vec, vector<int>& labels,
return nclasses;
}
// computes cubic spline coefficients for a function: (xi=i, yi=f[i]), i=0..n
template<typename _Tp> static void splineBuild(const _Tp* f, int n, _Tp* tab)
{
_Tp cn = 0;
int i;
tab[0] = tab[1] = (_Tp)0;
for(i = 1; i < n-1; i++)
{
_Tp t = 3*(f[i+1] - 2*f[i] + f[i-1]);
_Tp l = 1/(4 - tab[(i-1)*4]);
tab[i*4] = l; tab[i*4+1] = (t - tab[(i-1)*4+1])*l;
}
for(i = n-1; i >= 0; i--)
{
_Tp c = tab[i*4+1] - tab[i*4]*cn;
_Tp b = f[i+1] - f[i] - (cn + c*2)*(_Tp)0.3333333333333333;
_Tp d = (cn - c)*(_Tp)0.3333333333333333;
tab[i*4] = f[i]; tab[i*4+1] = b;
tab[i*4+2] = c; tab[i*4+3] = d;
cn = c;
}
}
// interpolates value of a function at x, 0 <= x <= n using a cubic spline.
template<typename _Tp> static inline _Tp splineInterpolate(_Tp x, const _Tp* tab, int n)
{
int ix = cvFloor(x);
ix = std::min(std::max(ix, 0), n-1);
x -= ix;
tab += ix*4;
return ((tab[3]*x + tab[2])*x + tab[1])*x + tab[0];
}
//////////////////////////////////////////////////////////////////////////////
// bridge C++ => C Seq API