GIP: Gated Interaction Prompt for Parameter Efficient Vision-Language Fine-Tuning

—Existing Parameter Efficient Fine-Tuning (PEFT) methods in vision-language (VL) domains, primarily adapted from single-modality approaches, face limitations in modeling cross-modal interactions. These methods often unify visual and textual features without explicit modality-specific processing, or rely on unidirectional interaction, leading to suboptimal task adaptation for pre-trained Vision-Language Models (VLMs). To address this issue, we propose a Gated Interaction Prompt (GIP) module as a plug-and-play adaptation to existing PEFT methods, which effectively enhances the two-way interaction between visual and textual features. Our GIP module integrates learnable prompts alongside visual and textual features into the attention layers of VLMs, serving as a bridge for cross-modal interaction. Furthermore, GIP introduces task-specific gating mechanisms to regulate and adapt the influence of prompts across different tasks, thereby further enhancing model performance. Extensive experiments on four VL tasks demonstrate that our approach can seamlessly integrate with existing methods and achieves significant performance improvements with minimal impact on parameter counts and computational costs. With only a 0.02% increase in trainable parameters, our method achieves performance gains of 0.6%, 0.8%, and 1.2% across four tasks—when applied to VL-PET, VL-Adapter, and LoRA, respectively.