Impala Documentation

void Impala::Core::VideoSet::BlackFrameProc::ComputeGradient	(	Array2dScalarReal64 *&	magnitude,
		Array2dScalarReal64 *	im,
		Real64	sigma
	)			`[inline]`

Definition at line 49 of file BlackFrameProc.h.

References Impala::Core::Array::Add(), Impala::Core::Array::Mul(), Impala::Application::DemoCamera2d::precision, Impala::Core::Array::RecGauss(), and Impala::Core::Array::Sqrt().

Referenced by HandleNewFrame().

00053     {
00054         Real64 precision = 3.0;
00055     
00056         Array2dScalarReal64* Lx = 0;
00057         Array2dScalarReal64* Ly = 0;
00058         RecGauss(Lx, im, sigma, sigma, 1, 0, precision);
00059         RecGauss(Ly, im, sigma, sigma, 0, 1, precision);
00060     
00061         // compute gradient magnitude
00062         Array2dScalarReal64* Lx2 = 0;
00063         Array2dScalarReal64* Ly2 = 0;
00064         Mul(Lx2, Lx, Lx);
00065         Mul(Ly2, Ly, Ly);
00066         Add(magnitude, Lx2, Ly2);
00067         Sqrt(magnitude, magnitude);
00068         delete Lx2;
00069         delete Ly2;
00070         
00071         // compute gradient direction
00072         //Atan2(direction, Ly, Lx);
00073         delete Lx;
00074         delete Ly;
00075     }

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