MobileFaceNets: Efficient CNNs for Accurate Real-Time Face Verification on Mobile Devices

TL;DR

MobileFaceNets are highly efficient CNN models designed for accurate, real-time face verification on mobile devices, achieving high accuracy with less than 1 million parameters and over 2x speedup compared to MobileNetV2.

Contribution

The paper introduces MobileFaceNets, a new class of lightweight CNNs optimized for face verification on mobile devices, outperforming previous models in accuracy and speed.

Findings

Achieve 99.55% accuracy on LFW

Over 2x speedup over MobileNetV2

Inference time of 18 ms on a mobile phone

Abstract

We present a class of extremely efficient CNN models, MobileFaceNets, which use less than 1 million parameters and are specifically tailored for high-accuracy real-time face verification on mobile and embedded devices. We first make a simple analysis on the weakness of common mobile networks for face verification. The weakness has been well overcome by our specifically designed MobileFaceNets. Under the same experimental conditions, our MobileFaceNets achieve significantly superior accuracy as well as more than 2 times actual speedup over MobileNetV2. After trained by ArcFace loss on the refined MS-Celeb-1M, our single MobileFaceNet of 4.0MB size achieves 99.55% accuracy on LFW and 92.59% TAR@FAR1e-6 on MegaFace, which is even comparable to state-of-the-art big CNN models of hundreds MB size. The fastest one of MobileFaceNets has an actual inference time of 18 milliseconds on a mobile phone. For face verification, MobileFaceNets achieve significantly improved efficiency over previous state-of-the-art mobile CNNs.