Single-scale cleaning residuals (Sect. 2.3). The field of Fig. 2 is shown as the reconstructed image ℐ_λD   R of the residuals at 350 μm (upper left) that accumulates cleaning residuals from all scales. The same set of spatial scales is displayed in the single-scale images of the residuals ℐ_λDj   R (left to right, top to bottom). The cleaning procedure left no significant intensity peaks of the simulated objects in the residuals, only the noise- and background-dominated pixels (cf. Fig. 7). The scale sizes S_j are visualized by the yellow-black circles and annotated at the bottom of the panels. The color coding is a linear function of intensity in MJy/sr.