Figure 5.

Maps of the polynomial coefficients decomposition with the referencing orthophoto for a selected frame of the mosaic, same 500 $\mathrm{\mu }\text{m}$ pixel size at object plane. Red markers indicate the detached regions validated by the restorer, in particular (+) was identified as very serious defect. Among the sound regions marked in black, ($\times$) is located in a part of the wall outside the painting that is well discriminated by TQR (see Fig. 4).