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Figure 5
Secondary training of the previous algorithms (G50 or H50) on ten images of target G (H50 > G10, top panels A and B, and E and F) or target H (G50 > H10, bottom panels C and D, and G and H), using 10 epochs and learning rates of 1 × 10−3 (panels A and C, and E and G) or 1 × 10−4 (panels B and D, and F and H), and evaluation on target G (left, A–D) or H (right, E–H). Whereas G50 > H10 seems to be performed correctly on both targets (with low influence by the learning rate used), the H50 > G10 algorithm seems to require higher learning rates for adapting to the secondary target (losing in turn adaptation to its primary target). This shows that the learning rate is a parameter that must be tuned depending on each target's characteristics. Performance indicator values are shown in Table 1[link].

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ISSN: 1600-5767
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