Sketch of the imaging iterations for the dumbbell-ring example. Upper left: initial residual. Upper right: we remove the dirty beam by computing a multiscalar model composed of DoB wavelets. The panel presents the recovered model (notation from Algorithm 1). Bottom right: we replace the DoB wavelets by DoG wavelets: getting a physically reasonable model that still fits the data. Bottom left: final updated residual computed from the DoG-model. Iterations continue if needed.