From Vision to Text: A Compact Multimodal Approach for Robust, Cross-Domain Presentation Attack Detection on ID Cards

• URL: http://arxiv.org/abs/2606.06966v1
• Date: Fri, 05 Jun 2026 06:45:39 GMT
• Title: From Vision to Text: A Compact Multimodal Approach for Robust, Cross-Domain Presentation Attack Detection on ID Cards
• Abstract summary: Cross-domain shifts challenge Presentation Attack Detection on ID Cards.<n>This work proposes a compact multimodal model, based on new generative and discriminative blocks.
• Score: 10.648001291111965
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Cross-domain shifts challenge Presentation Attack Detection (PAD) on ID Cards, given the restricted data available due to privacy concerns. This work proposes a compact multimodal model, based on new generative and discriminative blocks, which combines visual and textual data for PAD on genuine and synthetic ID images. While multimodal models exhibit strong generalisation after supervised fine-tuning, they fail in zero-shot settings. Our findings underscore that model capacity and real-world data are essential for reliable PAD, while existing synthetic datasets may not reflect real-world challenges. We argue for a re-evaluation of synthetic data as a benchmark and emphasise the need for more realistic, diverse datasets to advance PAD research.

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