Research map / Vision-language and multimodal / CLIP and zero-shot
Homology Consistency Constrained Efficient Tuning for Vision-Language Models
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Proposes a Homology Consistency constraint that aligns persistent-homology track structure of image and text latent manifolds (plus a deviating perturbation) to improve efficient adapter tuning of CLIP for few-shot and domain generalization.
Problem
Efficient transfer of vision-language models with few samples risks disrupting general image-text correspondence, so learned alignment generalizes poorly beyond observed samples.
Approach
Builds Vietoris-Rips complexes and filtrations over image and text embeddings, tracks 0-dimensional persistence tracks, and adds a loss forcing text-manifold tracks to coincide with image-manifold tracks, plus a deviating perturbation that spreads related images around text embeddings; tailored to TaskRes (residual blending) and Tip-Adapter-F (key-value cache).
Key results
- HC-TAF improves Tip-Adapter-F by 1.04% average at 16 shots and HC-TR improves TaskRes by 0.40% at 16 shots.
- HC*-TAF reaches 66.40% on ImageNet at 16 shots, above APE-T's 66.07%, the best prior baseline listed.
- On domain generalization with ViT-B/16, HC-TAF reaches 61.06% average target accuracy vs 60.95% for Tip-Adapter-F.
Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| Add homology consistency to TaskRes | TaskRes · ImageNet 16-shot | accuracy: 65.41 -> 65.90 | Helped |
| Add homology consistency to Tip-Adapter-F | Tip-Adapter-F · ImageNet 16-shot | accuracy: 65.43 -> 66.04 | Helped |
| Add homology consistency and pre-tuned text classifier to Tip-Adapter-F | Tip-Adapter-F · ImageNet 16-shot | accuracy: 65.43 -> 66.40 | Helped |
| Add homology consistency to Tip-Adapter-F | Tip-Adapter-F with ViT-B/16 · ImageNet-A | accuracy: 50.81 -> 50.75 | Hurt |
| Add homology consistency to TaskRes | TaskRes with ViT-B/16 · ImageNet-Sketch | accuracy: 65.81 -> 65.98 | Helped |
| Add deviating perturbation alongside track coincidence (ablation) | TaskRes + TC · ImageNet 16-shot | accuracy: 65.74 -> 65.90 | Helped |
| Add deviating perturbation without track coincidence (ablation) | TaskRes · ImageNet 16-shot | accuracy: 65.41 -> 65.33 | Hurt |
| Add deviating perturbation alongside track coincidence (ablation) | Tip-Adapter-F + TC · ImageNet 16-shot | accuracy: 65.99 -> 66.04 | Helped |
| Add deviating perturbation without track coincidence (ablation) | Tip-Adapter-F · ImageNet 16-shot | accuracy: 65.43 -> 65.17 | Hurt |
| Increase η from 5 to 15 with λ fixed at 2.5 (ablation) | HC-TR · ImageNet 16-shot | accuracy: 65.67 -> 65.90 | Helped |
| Increase η from 15 to 25 with λ fixed at 2.5 (ablation) | HC-TR · ImageNet 16-shot | accuracy: 65.90 -> 65.72 | Hurt |
| Increase ω from 0.1 to 0.4 with λ fixed at 100 (ablation) | HC-TAF · ImageNet 16-shot | accuracy: 65.59 -> 66.04 | Helped |
Surprising findings
- Deviating perturbation alone (without track coincidence) degrades baseline performance, and HC-TR underperforms TaskRes on several target domains with ResNet and ViT-B/32 backbones.
Limitations
- Higher-dimensional homology classes are not explored; only 0-dimensional classes are used.
- Evaluated only on few-shot recognition tasks and domain generalization, not other VLM downstream tasks.
- Gains are modest (often under 1%) and no error bars or statistical significance tests are reported.
Experimental setup
Datasets: ImageNet Caltech101 DTD EuroSAT FGVCAircraft Flowers102 Food101 OxfordPets StanfordCars SUN397 UCF101 ImageNetV2
Benchmarks: ImageNet Caltech101 DTD EuroSAT FGVCAircraft Flowers102 Food101 OxfordPets StanfordCars SUN397 UCF101 ImageNetV2
Metrics: accuracy
Baselines: Zero-shot CLIP Linear probe CLIP CLIP-Adapter TaskRes Tip-Adapter-F GraphAdapter APE-T
Builds on: TaskRes Tip-Adapter-F CLIP CLIP-Adapter
Closest papers by meaning
- Topology-Aware Representation Alignment for Semi-Supervised Vision-Language Learning (NeurIPS 2026 · similarity 0.91)
- DH-Set: Improving Vision-Language Alignment with Diverse and Hybrid Set-Embeddings Learning (CVPR 2025 · similarity 0.87)
- Fill the GAP: A Granular Alignment Paradigm for Visual Reasoning in Multimodal Large Language Models (NeurIPS 2026 · similarity 0.87)
- Locality Alignment Improves Vision-Language Models (ICLR 2025 · similarity 0.86)
- Directed-Tokens: A Robust Multi-Modality Alignment Approach to Large Language-Vision Models (NeurIPS 2025 · similarity 0.86)
- Text as Partial Constraint: Core–Residual Alignment for Robust Vision–Language Learning (NeurIPS 2026 · similarity 0.86)
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