Fig. 4: Label-free multimodal nonlinear images of human skin.

Large-field images of normal skin tissue (a) and pigmented nevus tissue (b) with ROIs (white squares) magnified in (c)–(f). From left to right: registered input, network output, and GT images. White solid lines in c–f refer to the line of the shown cross-section. Scale bars, 500 μm in (a), (b), 50 μm in (c), (f), and 100 μm in (d), (e).