Inferred images of Betelgeuse at January 9, 2014 (top left panel) and December 9, 2015 (bottom left panel). The top left image corresponds in date with PIONEER observations published by Montargès et al. (2016) and Aurière et al. (2016) whose reconstructed image we reproduce at the top right. The bottom left image can be compared with an ALMA observation made on November 9, 2015 and published by Kervella et al. (2018) which is reproduced at the bottom right.