VL-JEPA用连续嵌入预测替代文本生成,更高效且性能更强。
VL-JEPA: Joint Embedding Predictive Architecture for Vision-language
- 用连续嵌入替代逐词生成,聚焦语义本质。
- 参数少50%却超越CLIP等模型,8个视频任务平均领先。
- 支持按需解码和零修改开放词汇检索,适合多任务应用。
我们提出VL-JEPA,一种基于联合嵌入预测架构(JEPA)的视觉语言模型。与传统VLM逐令牌自回归生成不同,VL-JEPA直接预测目标文本的连续嵌入。通过在抽象表示空间中学习,模型关注任务相关语义,忽略表层语言差异。在使用相同视觉编码器和训练数据的严格对比中,VL-JEPA性能更强,且可训练参数减少50%。推理时仅在必要时调用轻量级文本解码器将预测嵌入转为文本。我们证明,VL-JEPA天然支持选择性解码,解码操作次数减少2.85倍,同时保持与非自适应均匀解码相当的性能。除生成外,其嵌入空间无需修改即可支持开放词汇分类、文本到视频检索和判别式VQA。在八个视频分类和八个视频检索数据集上,平均表现超越CLIP、SigLIP2和Perception Encoder。尽管仅有16亿参数,在四个VQA数据集(GQA、TallyQA、POPE和POPEv2)上仍达到与InstructBLIP、QwenVL相当的性能。
原文摘要 · Abstract (English)
We introduce VL-JEPA, a vision-language model built on a Joint Embedding Predictive Architecture (JEPA). Instead of autoregressively generating tokens as in classical VLMs, VL-JEPA predicts continuous embeddings of the target texts. By learning in an abstract representation space, the model focuses on task-relevant semantics while abstracting away surface-level linguistic variability. In a strictly controlled comparison against standard token-space VLM training with the same vision encoder and training data, VL-JEPA achieves stronger performance while having 50% fewer trainable parameters. At inference time, a lightweight text decoder is invoked only when needed to translate VL-JEPA predicted embeddings into text. We show that VL-JEPA natively supports selective decoding that reduces the number of decoding operations by 2.85x while maintaining similar performance compared to non-adaptive uniform decoding. Beyond generation, the VL-JEPA's embedding space naturally supports open-vocabulary classification, text-to-video retrieval, and discriminative VQA without any architecture modification. On eight video classification and eight video retrieval datasets, the average performance VL-JEPA surpasses that of CLIP, SigLIP2, and Perception Encoder. At the same time, the model achieves comparable performance as classical VLMs (InstructBLIP, QwenVL) on four VQA datasets: GQA, TallyQA, POPE and POPEv2, despite only having 1.6B parameters.
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