Top: restored image comparison between the MS–MFS (left) and WAsp (right) on the G055.7+3.4 dataset, representing a real-data wide-band imaging test of scale modeling and spectral index recovery. Middle: residual image comparison between the MS–MFS (left) and WAsp (right) on the G055.7+3.4 dataset. Bottom: spectral index comparison between the MS–MFS (left) and WAsp (right) on the G055.7+3.4 dataset. All images in each row are displayed at a common scale shown in the color bar on the right of each row.