a) 0.0431 (b) 0.2638 (c) 0.0050 (d) 0.3389 Figure 1: How does brightness of an image pair affect matching accuracy? Impostor image pairs have, on average, higher similarity scores if the image pair brightness is too dark or too bright. Imposter pairs (b) and (d) are too bright and too dark version for (a) and (c), resulting in higher similarity (ArcFace similarity scores are given).
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