CLIP-FTI: Fine-Grained Face Template Inversion via CLIP-Driven Attribute Conditioning

• URL: http://arxiv.org/abs/2512.15433v1
• Date: Wed, 17 Dec 2025 13:26:34 GMT
• Title: CLIP-FTI: Fine-Grained Face Template Inversion via CLIP-Driven Attribute Conditioning
• Authors: Longchen Dai, Zixuan Shen, Zhiheng Zhou, Peipeng Yu, Zhihua Xia,
• Abstract summary: Face recognition systems store face templates for efficient matching.<n>Once leaked, these templates pose a threat: inverting them can yield surrogates that compromise privacy and enable impersonation.<n>We present CLIP-FTI, a CLIP-driven fine-grained attribute conditioning framework for face template inversion.
• Score: 15.01028853162385
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Face recognition systems store face templates for efficient matching. Once leaked, these templates pose a threat: inverting them can yield photorealistic surrogates that compromise privacy and enable impersonation. Although existing research has achieved relatively realistic face template inversion, the reconstructed facial images exhibit over-smoothed facial-part attributes (eyes, nose, mouth) and limited transferability. To address this problem, we present CLIP-FTI, a CLIP-driven fine-grained attribute conditioning framework for face template inversion. Our core idea is to use the CLIP model to obtain the semantic embeddings of facial features, in order to realize the reconstruction of specific facial feature attributes. Specifically, facial feature attribute embeddings extracted from CLIP are fused with the leaked template via a cross-modal feature interaction network and projected into the intermediate latent space of a pretrained StyleGAN. The StyleGAN generator then synthesizes face images with the same identity as the templates but with more fine-grained facial feature attributes. Experiments across multiple face recognition backbones and datasets show that our reconstructions (i) achieve higher identification accuracy and attribute similarity, (ii) recover sharper component-level attribute semantics, and (iii) improve cross-model attack transferability compared to prior reconstruction attacks. To the best of our knowledge, ours is the first method to use additional information besides the face template attack to realize face template inversion and obtains SOTA results.

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