 #include <inttypes.h>
 
 using namespace popart;
+using namespace std;
 
 // Lowe wants at most 3 orientations at every extremum,
 // VLFeat uses at most 4, OpenCV all it can find


    #pragma unroll
    for( int i=0; i<ORIENTATION_MAX_COUNT; i++ ) {
        maxbin[i] = 0;
        y_max[i] = -INFINITY;
    }


    }

    float chosen_bin = xcoord[maxbin[0]];
    if( chosen_bin >= ORI_NBINS ) chosen_bin -= ORI_NBINS;

    float th = __fdividef(M_PI2 * chosen_bin , ORI_NBINS) - M_PI;

    ext->orientation = th;
