Method kernelGradient

dependency/densecrf3d/src/pairwise.cpp:83–87

Compute d/df a^T*K*b

	}
	// Compute d/df a^T*K*b
	MatrixXf kernelGradient( const MatrixXf & a, const MatrixXf & b ) const {
		MatrixXf g = 0*f_;
		lattice_.gradient( g.data(), a.data(), b.data(), a.rows() );
		return g;
	}
	MatrixXf featureGradient( const MatrixXf & a, const MatrixXf & b ) const {
		if (ntype_ == NO_NORMALIZATION )
			return kernelGradient( a, b );