129 Figure 9 - Reconstruction progression of Deposit 6 as more principal components are retained. The main dipole structure is recovered by $K = 17$, with only minor changes and noise beyond this point. To provide a transparent baseline, the ranked predictions were also compared with a raw similarity method based on direct Euclidean distance in the original pixel-value space. sPCA recovered 54.1% of the total test-deposit area by rank 250, compared with 10.2% for the raw TMI baseline. It also produced five threshold-reaching hits, with the first occurring at rank 5, whereas the raw ranking produced only one hit, first occurring at rank 29. In Error! Reference source not found., yellow markers indicate overlap events, w here a predicted window intersects a test deposit, and red markers indicate hit events, where a deposit first reaches the 50% coverage threshold. The cumulative recovery AUC likewise increased from 14.04 to 83.15.
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