Comparison between a TLOCI post-processing of the SPHERE reduction pipeline (Delorme et al. 2017) (left column) and the proposed PIC method (right column) on the HR 8799 dataset. The contrast of the planet closest to the star is increased by the PIC method and several false positives are avoided. a–d: monochromatic images of the post-processed hyperspectral cube and planet detection S/N (square root stretch of the intensity, colour bar: arbitrary unit) at λ = 972 nm (a,b) and λ = 1636 nm (c,d). e,f: maps of planet detection S/N combining all wavelengths (red circles: true positives, blue boxes: false positives with the SPHERE pipeline, colour bar: S/N).