AMBER/VLTI datasets of V382 Car (left panel) and HR 5171 A (right panel). For each star, the top panel shows squared visibilities in log-scale versus spatial frequencies. Red, green, and blue represent data points dispersed in the K, H, and J bands, respectively. The residuals are shown below with ±3 sigma indicated as dashed horizontal lines. The bottom panel shows the closure phases versus the spatial frequencies of the largest of the 3 baselines involved. The best geometrical models are shown as thick and black solid lines.