Lightweight Modular Parameter-Efficient Tuning for Open-Vocabulary Object Detection

• URL: http://arxiv.org/abs/2408.10787v4
• Date: Thu, 25 Sep 2025 12:01:46 GMT
• Title: Lightweight Modular Parameter-Efficient Tuning for Open-Vocabulary Object Detection
• Authors: Bilal Faye, Hanane Azzag, Mustapha Lebbah,
• Abstract summary: We propose UniProj-Det, a lightweight modular framework for parameter-efficient open-vocabulary object detection.<n>UniProj-Det freezes pretrained backbones and introduces a Universal Projection module with a learnable modality token, enabling unified vision--language adaptation at minimal cost.
• Score: 2.1155908599769764
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Open-vocabulary object detection (OVD) extends recognition beyond fixed taxonomies by aligning visual and textual features, as in MDETR, GLIP, or RegionCLIP. While effective, these models require updating all parameters of large vision--language backbones, leading to prohibitive training cost. Recent efficient OVD approaches, inspired by parameter-efficient fine-tuning methods such as LoRA or adapters, reduce trainable parameters but often face challenges in selecting which layers to adapt and in balancing efficiency with accuracy. We propose UniProj-Det, a lightweight modular framework for parameter-efficient OVD. UniProj-Det freezes pretrained backbones and introduces a Universal Projection module with a learnable modality token, enabling unified vision--language adaptation at minimal cost. Applied to MDETR, our framework trains only about ~2-5% of parameters while achieving competitive or superior performance on phrase grounding, referring expression comprehension, and segmentation. Comprehensive analysis of FLOPs, memory, latency, and ablations demonstrates UniProj-Det as a principled step toward scalable and efficient open-vocabulary detection.

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