3D vs. 2D Biometrics: Talking Photons, Bias, and Perspective Distortion with FaceTec’s Jay Meier

For ID Talk’s first episode of 2025, FaceTec VP Jay Meier returns to dig into the technical underpinnings of his firm’s biometric solution. The discussion explores the critical differences between 2D and 3D biometric systems, with Jay detailing the limitations of 2D systems, including perspective distortions and challenges with depth perception, and explaining how 3D technology provides a game-changing approach to accuracy and reliability in facial matching and liveness detection. The conversation also tackles the ongoing issue of bias in biometric systems, particularly regarding skin tone, and the real-world challenges of applying lab-tested solutions in diverse, uncontrolled environments.

Jay takes a deep dive into the technical challenges posed by 2D systems, particularly their reliance on flat, two-dimensional data to interpret three-dimensional objects like human faces. He explains how perspective distortions and variable depths of field create unreliable data, leading to reduced confidence in matches. By contrast, 3D systems capture orders of magnitude more information by adding depth to measurements, significantly increasing confidence in both liveness detection and identity verification. He also delves into the role of environmental factors, such as lighting conditions, in affecting 2D systems’ accuracy, underscoring the need for innovative approaches like FaceTec’s.

“3D captures length, width, and depth, providing orders of magnitude more measurable data,” Jay explains. “That’s why it’s inherently superior to 2D systems in terms of confidence and accuracy.”

He also addresses the ongoing issue of bias in biometric systems, putting the issue into scientific terms. “The darker the skin tone, the more visible light is absorbed by the skin and the less visible light reflects back to the sensor,” he observes. “That’s where the bias comes from in these systems.” These insights highlight the challenges of achieving equitable biometric performance and the importance of designing systems that perform reliably across diverse user demographics.

The discussion not only offers compelling insights about FaceTec’s 3D imaging technology, but also suggests important implications across biometric identity technology more broadly. Listen to Part 1 of this two-part interview wherever you get your podcasts, or through the media player below:

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January 6, 2025 – by the ID Tech Editorial Team