Fig. 2 | Heritage Science

Fig. 2

From: Automatic defect detection in infrared thermal images of ancient polyptychs based on numerical simulation and a new efficient channel attention mechanism aided Faster R-CNN model

Fig. 2

Fabrication of the replicas: a The two panels are used as the substrate, b coating adhesive, c inserting the initial Teflon piece (defect 1), d applying adhesive to the linen canvas, e allowing the linen canvas layer to dry, f inserting the second Teflon piece (defect 2), g coating a plaster-glue mixture, h making the plaster layer smooth, i inserting the third Teflon piece (defect 3) j making the second plaster layer smooth, k sketching the outline of the figure, l placing the gold foil (m) employing a moistened sponge to affix the gold foil (n) applying pigment to sample B, o applying different colors to sample A, and (p) drying of the final samples

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