Results of the image reconstruction. Left: K-band continuum reconstructed images of HD 58647 at different wavelengths (reported in the labels). North is up, and east is to the left. The white hollow ellipse at the lower-left corner of the bottom panel represents the size of the clean beam. Contours represent 3, 5, and 10 σ pixel significance levels. Middle and right: squared visibilities (|V|²; middle panel) and closure phases (T3_ϕ; right panel) as a function of the spatial frequency. The observed data with their corresponding error bars are represented as black dots, while the synthetic observables extracted from the reconstructed images are shown in colour.