Fig. 4.
Top row: raw image of a 0.2 s exposure of β Pictoris obtained with VLT/NACO in the L′ filter. The close-up of the blue region shows a cluster of bad pixels and the close-up of the red region shows the PSF of the star with several surrounding bad pixels. Middle row: sigma clipping applied to the raw image with a filter of 9 × 9 pixels and a threshold of 5σ. Bottom row: interpolation of the preselected bad pixels with 1000 iterations by the spectral deconvolution.
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