private void perturb ( double disturbance , Point2D_F64 pixel , Point2D3D p23 ) { double x ; double y = pixel . y ; x = pixel . x + disturbance ; computeDisturbance ( x , y , p23 ) ; x = pixel . x - disturbance ; computeDisturbance ( x , y , p23 ) ; x = pixel . x ; y = pixel . y + disturbance ; computeDisturbance ( x , y , p23 ) ; y = pixel . y - disturbance ; computeDisturbance ( x , y , p23 ) ; }
Perturb the observation in 4 different ways