How Face Matching Works

From pixel to decision: a face image becomes a 512-number embedding, and the match is a cosine similarity between two embeddings. These are real images and real embeddings from the eval corpus.

Liveness & Presentation Attack Detection

A face match alone is not enough — an attacker can present a photo instead of a live face. PAD determines whether the biometric is live. Illustrative — measured PAD track is v2

Findings Exhibit

v1 eval results — ArcFace on 150 synthetic identities, 9,750 pairs. Reframed for a learner: what each panel shows and why it matters.

Caveat: Corpus is 87% male (single sex axis). Bias panel is illustrative. Disaggregated results with balanced demographics land in v1.5. FairFace labels on synthetic faces are approximate.