Correction to 1-MBB τ estimates calculated with neural nets. Frame a shows the 246 × 246 pixel map that is used as the training set. Frame c shows the 1-MBB results for the whole IRDC map, where the location of the training map is indicated with a dashed box in the upper left corner. Frames b and d shows the corrected τ maps for the training set and for the full 1875 × 1875 pixel map, respectively. The lower frames include histograms of the τ/τ₀ values with their mean and standard deviation values.