Post-processed image of the 51 Eri SPHERE data cube (as in Fig. 11, left) using ADI-based algorithms. Left: cADI (Marois et al. 2006a) for which the temporal median is used as a QSS field model. Middle left: PCA (Amara & Quanz 2012; Soummer et al. 2012), for which a linear combination of the three first principal components is used as a QSS field model. Middle right: PCA using five components. Right: PCA using ten components. Contrast of about one order of magnitude is lost because of the WDH residuals.