---
license: cc-by-nc-4.0
tags:
- face-recognition
- rare-disease
- facial-dysmorphology
- arcface
- gestaltmatcher
library_name: pytorch
---

# GestaltMatcher-Arc (GMDB) — self-trained reproduction

ArcFace **ResNet-50** face encoder, pre-trained on **Glint360K** (~360K identities, ~17M faces)
and **fine-tuned on GestaltMatcherDB (GMDB) v1.1.2** to embed the facial gestalt of rare
genetic syndromes. Produces a 512-d embedding; diagnosis is nearest-prototype cosine retrieval.

This is the **face-specialist component** of the SyndroDX open-world rare-disease diagnosis framework.

## Training
| | |
|---|---|
| backbone | ArcFace ResNet-50 (Glint360K pre-trained) |
| fine-tune data | GMDB v1.1.2, original (non-enhanced) aligned faces |
| loss | ArcFace margin |
| image size | 112 x 112 |
| embedding dim | 512 |
| batch size | 2048 |
| epochs | 50 |

## Benchmark (GMDB official patient-level split, n=476)
| metric | value |
|---|---|
| top-1 | 52.5% |
| top-5 | 66.8% |
| top-10 | 74.2% |

## Provenance, license & responsible use
- Derived from **GestaltMatcher-Arc** (CC-BY-NC 4.0) — non-commercial, attribution required.
- Fine-tuned on **GMDB**, an **access-controlled** database of patient facial images. These
  weights are derived from controlled patient data; do not redistribute publicly without
  confirming the GMDB data use agreement. **Private / research use.**
- Face-recognition model trained on patient faces — handle under appropriate privacy/ethics controls.

Cite GestaltMatcher / GestaltMatcher-Arc and GMDB when using this model.