The 160 μm (frame a)) and 350 μm (frame b)) surface brightness maps (N = 0.1) that include stripes with constant surface brightness offsets. The white lines indicate the widths of these stripes. Frames c) and d) show the distribution of (T, β) values obtained with HM for all the pixels (frame c)) and separately for the pixels outside the stripes (frame d)). Frames e) and f) show the corresponding results for method HMC. The black contours correspond to the distribution of values for method HM, in the case of no stripe artefacts and no noise (see Fig. 17). In frames c–f), the colour scale corresponds to logarithmic density of pixels per a (T, β) interval.