Impala Documentation

template<int INDEX_SIZE, int ORI_SIZE>

void Impala::Core::Feature::FISTDescriptor< INDEX_SIZE, ORI_SIZE >::InternalCount	(	Real64 *	descriptor,
		Array::Array2dScalarReal64 *	magnitude,
		Array::Array2dScalarReal64 *	direction,
		int	r,
		int	c,
		Real64	rpos,
		Real64	cpos,
		Real64	rx,
		Real64	cx,
		Real64	pointOrientation
	)			`[inline]`

Definition at line 162 of file KoenFIST2.h.

References Impala::Core::Feature::FISTDescriptor< INDEX_SIZE, ORI_SIZE >::CanonicalizeAngle(), Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::CH(), Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::CW(), Impala::Core::Feature::FISTDescriptor< INDEX_SIZE, ORI_SIZE >::noGaussianWeighting, Impala::Core::Feature::FISTDescriptor< INDEX_SIZE, ORI_SIZE >::PutInVector(), Impala::Application::DemoCamera2d::sigma, and Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::Val().

Referenced by Impala::Core::Feature::FISTDescriptor< INDEX_SIZE, ORI_SIZE >::InternalSample().

00166     {
00167         // bounds check
00168         if (r < 0  ||  r >= magnitude->CH()  ||  c < 0  ||  c >= magnitude->CW())
00169            return;
00170         
00171         Real64 mag = 0.0;
00172         if(noGaussianWeighting)
00173         {
00174             mag = magnitude->Val(c, r);
00175         }
00176         else
00177         {
00178             // find Gaussian weight, depending on distance from center
00179             const Real64 IndexSigma = 1.0;
00180             Real64 sigma = IndexSigma * 0.5 * INDEX_SIZE;
00181             Real64 weight = exp(- (rpos * rpos + cpos * cpos) / (2.0 * sigma * sigma));
00182             mag = weight * magnitude->Val(c, r);
00183         }
00184     
00185         /* Subtract keypoint orientation to give ori relative to keypoint. */
00186         Real64 ori = direction->Val(c, r) - pointOrientation;
00187         ori = CanonicalizeAngle(ori);
00188         PutInVector(descriptor, mag, ori, rx, cx);
00189     }

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