refine1D_1        241 modules/features2d/src/brisk.cpp   refine1D_1(const float s_05, const float s0, const float s05, float& max) const; // around intra
refine1D_1       1379 modules/features2d/src/brisk.cpp     scale = refine1D_1(max_below, std::max(float(center), max_layer), max_above, max);