Impala Documentation

void Impala::Core::Feature::ExtractFeatureIntoVector	(	Real64 *	vector,
		std::vector< Array::Array2dScalarReal64 * > &	features,
		int	x,
		int	y,
		int	spatiality
	)			`[inline]`

subroutine of DSurf - extract from the collection of images 'features'; at the point (x,y) a feature that we will store in vector 'v' x and y are assumed to be in range of the image considering spatiality

Definition at line 37 of file DSurf.h.

Referenced by DSurf().

00040 {
00041     double length = 0.;
00042     int begin = 0;
00043     for(int f=0 ; f<features.size() ; ++f)
00044     {
00045         for(int j=y ; j<y+spatiality ; ++j)
00046             for(int i=x ; i<x+spatiality ; ++i)
00047             {
00048                 double v = features[f]->Value(i,j);
00049                 vector[begin++] = v;
00050                 length += v*v;
00051             }
00052     }
00053     // normalize the vector that we just added
00054     if(length != 0)
00055     {
00056         length = sqrt(length);
00057         for(int i=0 ; i<features.size() * spatiality * spatiality; i++)
00058             vector[i] /= length;
00059     }
00060 }