Impala Documentation

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

Definition at line 58 of file BlackFrameDetect.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().

00062     {
00063         Real64 precision = 3.0;
00064     
00065         Array2dScalarReal64* Lx = 0;
00066         Array2dScalarReal64* Ly = 0;
00067         RecGauss(Lx, im, sigma, sigma, 1, 0, precision);
00068         RecGauss(Ly, im, sigma, sigma, 0, 1, precision);
00069     
00070         // compute gradient magnitude
00071         Array2dScalarReal64* Lx2 = 0;
00072         Array2dScalarReal64* Ly2 = 0;
00073         Mul(Lx2, Lx, Lx);
00074         Mul(Ly2, Ly, Ly);
00075         Add(magnitude, Lx2, Ly2);
00076         Sqrt(magnitude, magnitude);
00077         delete Lx2;
00078         delete Ly2;
00079         
00080         // compute gradient direction
00081         //Atan2(direction, Ly, Lx);
00082         delete Lx;
00083         delete Ly;
00084     }

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