Reconocimiento facial
Decidir si dos rostros son la misma persona
El texto completo se presenta en inglés; el título y el resumen están traducidos.
QUÉ SIGNIFICA ESTA CAPACIDAD
Takes one or two face images and outputs an identity decision: verification answers whether the two are the same person, while identification asks who in a gallery a face matches. Faces are first aligned and encoded into feature vectors, then compared by distance. Unlike classification the class set is not fixed; the comparison target comes from a dynamic gallery.
Cómo se consigue técnicamente
The pipeline typically detects a face, aligns it by keypoints, and extracts a feature vector with a deep network trained by metric learning to pull the same person together and push others apart. Early systems relied on hand-crafted features; deep metric learning around 2014 pushed accuracy past the practical threshold. Liveness detection, which separates a live person from a photo or a mask, is an indispensable part of any deployment.
Productos representativos
1Organizaciones relacionadas
Usos típicos
- Access control and ID verification
- Automatic people grouping in photo albums
- Identity confirmation for remote account opening
- Video search and person tracking
Cómo se evalúa
- 1:1 verification accuracy
- Correct same-or-different decisions
- TAR@FAR
- True accept rate at a fixed false accept rate
- Identification mAP
- Ranking quality when searching a gallery
Límites y dificultades
- Large pose differences, age gaps and harsh lighting push the same person apart in feature space
- Uneven training data produces systematic bias across skin tones and genders
- Photos, replayed video and realistic masks can fool the system, so liveness detection is required, not optional
Conceptos detrás
Representación digital de imágenes
Para una máquina, una foto no es más que cuadrículas de números superpuestas
Visión autosupervisada y aprendizaje contrastivo multimodal
Sin etiquetas: aprender a ver deduciendo qué imágenes son la misma
Evaluación de modelos y validación cruzada
La exactitud es la métrica más fácil de engañar — si evalúas mal, todo lo demás cae