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ClearCLIP: Decomposing CLIP Representations for Dense Vision-Language Inference

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arxiv 2407.12442 v1 pith:DQWMDIF3 submitted 2024-07-17 cs.CV

classification cs.CV
keywords segmentationclipclearclipresidualacrossattentionconnectionmaps
verification ladder T0 review T1 audit T2 compute T3 formal
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Despite the success of large-scale pretrained Vision-Language Models (VLMs) especially CLIP in various open-vocabulary tasks, their application to semantic segmentation remains challenging, producing noisy segmentation maps with mis-segmented regions. In this paper, we carefully re-investigate the architecture of CLIP, and identify residual connections as the primary source of noise that degrades segmentation quality. With a comparative analysis of statistical properties in the residual connection and the attention output across different pretrained models, we discover that CLIP's image-text contrastive training paradigm emphasizes global features at the expense of local discriminability, leading to noisy segmentation results. In response, we propose ClearCLIP, a novel approach that decomposes CLIP's representations to enhance open-vocabulary semantic segmentation. We introduce three simple modifications to the final layer: removing the residual connection, implementing the self-self attention, and discarding the feed-forward network. ClearCLIP consistently generates clearer and more accurate segmentation maps and outperforms existing approaches across multiple benchmarks, affirming the significance of our discoveries.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Plug-in Feedback Self-adaptive Attention in CLIP for Training-free Open-Vocabulary Segmentation

    cs.CV 2025-08 conditional novelty 6.0 of 10

    A feedback self-adaptive attention module uses CLIP's own output predictions as a spatial coherence prior to reweight intermediate attention, improving training-free open-vocabulary segmentation across 8 benchmarks.

  2. Annotation-Free Open-Vocabulary Segmentation for Remote-Sensing Images

    cs.CV 2025-08 conditional novelty 6.0 of 10

    SegEarth-OV performs annotation-free open-vocabulary segmentation of remote-sensing images by upsampling CLIP features, removing global bias, and distilling optical knowledge into a SAR encoder.

  3. Bridge Feature Matching and Cross-Modal Alignment with Mutual-filtering for Zero-shot Anomaly Detection

    cs.CV 2025-07 conditional novelty 6.0 of 10

    FiSeCLIP achieves state-of-the-art zero-shot anomaly detection by using a batch of test images as mutual references and filtering noisy features with text-guided masks, without any training.

  4. MARBLE: Material Recomposition and Blending in CLIP-Space

    cs.CV 2025-06 conditional novelty 6.0 of 10

    MARBLE performs material blending and parametric material-attribute control by manipulating CLIP image embeddings and injecting them into a specific U-Net block of a pre-trained diffusion model.

  5. Single Domain Generalization for Few-Shot Counting via Universal Representation Matching

    cs.CV 2025-05 conditional novelty 6.0 of 10

    URM distills CLIP vision-language representations into learnable prototypes for few-shot counting, improving single-domain generalization on unseen datasets.

  6. The Hyperspherical Geometry of CLIP Latent Space: A Semantic Mixture Model

    cs.LG 2026-07 conditional novelty 5.0 of 10

    CLIP embeddings are modeled as a mixture of von Mises-Fisher distributions on the unit sphere, improving out-of-distribution detection and semantic decomposition over single-Gaussian baselines.

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