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Image resolution, or in general, image quality, plays an essential role in the performance of today&#x0027;s face recognition systems. To address this problem, we propose a novel combination of the popular triplet loss to improve robustness against image resolution via fine-tuning of existing face recognition models. With octuplet loss, we leverage the relationship between high-resolution images and their synthetically down-sampled variants jointly with their identity labels. Fine-tuning several state-of-the-art approaches with our method proves that we can significantly boost performance for cross-resolution (high-to-low resolution) face verification on various datasets without meaningfully exacerbating the performance on high-to-high resolution images. Our method applied on the FaceTransformer network achieves 95.12&#x0025; face verification accuracy on the challenging XQLFW dataset while reaching 99.73&#x0025; on the LFW database. Moreover, the low-to-low face verification accuracy benefits from our method. We release our code 1  1 Code available on https://github.com/Martlgap/octuplet-loss to allow seamless integration of the octuplet loss into existing frameworks.

Octuplet Loss: Make Face Recognition Robust to Image Resolution