Left panel: flux measured on the peak of the residual and normalized to the injected F1 as a function of the flux ratio. The legend values indicate the separation in λ/D (equivalent to 87, 121, 173, 208, 259, 294, 346, 381, 433, 520, 690, and 866 mas). PSFs were reduced independently in noise-free images. Right panel: relative position between the peak in the residual pattern and the injected PSF. The 0.1 pixel in precision on the peak measurement leads to an unsmoothed curve.