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检索条件"任意字段=2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition, CVPR 2023"

共 11753 条记录，以下是61-70 订阅

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Recognizing Rigid patterns of Unlabeled Point Clouds by Complete and Continuous Isometry Invariants with no False Negatives and no False Positives

Recognizing Rigid Patterns of Unlabeled Point Clouds by Comp...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Widdowson, Daniel Kurlin, Vitaliy Univ Liverpool Comp Sci Dept Liverpool Merseyside England

ISBN: (纸本)9798350301298

Rigid structures such as cars or any other solid objects are often represented by finite clouds of unlabeled points. The most natural equivalence on these point clouds is rigid motion or isometry maintaining all inter-point distances. Rigid patterns of point clouds can be reliably compared only by complete isometry invariants that can also be called equivariant descriptors without false negatives (isometric clouds having different descriptions) and without false positives (non-isometric clouds with the same description). Noise and motion in data motivate a search for invariants that are continuous under perturbations of points in a suitable metric. We propose the first continuous and complete invariant of unlabeled clouds in any Euclidean space. For a fixed dimension, the new metric for this invariant is computable in a polynomial time in the number of points.

关键词： detection recognition: Categorization retrieval

来源：评论

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Semi-supervised Parametric Real-world Image Harmonization

Semi-supervised Parametric Real-world Image Harmonization

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Wang, Ke Gharbi, Michael Zhang, He Xia, Zhihao Shechtman, Eli Adobe Inc San Jose CA 95110 USA Univ Calif Berkeley EECS Berkeley CA 94720 USA

ISBN: (纸本)9798350301298

Learning-based image harmonization techniques are usually trained to undo synthetic random global transformations applied to a masked foreground in a single ground truth photo. This simulated data does not model many of the important appearance mismatches (illumination, object boundaries, etc.) between foreground and background in real composites, leading to models that do not generalize well and cannot model complex local changes. We propose a new semi-supervised training strategy that addresses this problem and lets us learn complex local appearance harmonization from unpaired real composites, where foreground and background come from different images. Our model is fully parametric. It uses RGB curves to correct the global colors and tone and a shading map to model local variations. Our method outperforms previous work on established benchmarks and real composites, as shown in a user study, and processes high-resolution images interactively. Code, and project page available at: https://***/sprih/.

关键词： Low-level vision

来源：评论

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Light Source Separation and Intrinsic Image Decomposition under AC Illumination

Light Source Separation and Intrinsic Image Decomposition un...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Yoshida, Yusaku Kawahara, Ryo Okabe, Takahiro Kyushu Inst Technol Dept Artificial Intelligence 680-4 Kawazu Iizuka Fukuoka 8208502 Japan

ISBN: (纸本)9798350301298

Artificial light sources are often powered by an electric grid, and then their intensities rapidly oscillate in response to the grid's alternating current (AC). Interestingly, the flickers of scene radiance values due to AC illumination are useful for extracting rich information on a scene of interest. In this paper, we show that the flickers due to AC illumination is useful for intrinsic image decomposition (IID). Our proposed method conducts the light source separation (LSS) followed by the IID under AC illumination. In particular, we reveal the ambiguity in the blind LSS via matrix factorization and the ambiguity in the IID assuming the diffuse reflection model, and then show why and how those ambiguities can be resolved via a physics-based approach. We experimentally confirmed that our method can recover the colors of the light sources, the diffuse reflectance values, and the diffuse and specular intensities (shadings) under each of the light sources, and that the IID under AC illumination is effective for application to auto white balancing.

关键词： Physics-based vision and shape-from-X

来源：评论

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Weakly Supervised Video Emotion Detection and Prediction via Cross-Modal Temporal Erasing Network

Weakly Supervised Video Emotion Detection and Prediction via...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Zhang, Zhicheng Wang, Lijuan Yang, Jufeng Nankai Univ Coll Comp Sci TMCC Tianjin Peoples R China

ISBN: (纸本)9798350301298

Automatically predicting the emotions of user-generated videos (UGVs) receives increasing interest recently. However, existing methods mainly focus on a few key visual frames, which may limit their capacity to encode the context that depicts the intended emotions. To tackle that, in this paper, we propose a cross-modal temporal erasing network that locates not only keyframes but also context and audio-related information in a weakly-supervised manner. In specific, we first leverage the intra- and inter-modal relationship among different segments to accurately select keyframes. Then, we iteratively erase keyframes to encourage the model to concentrate on the contexts that include complementary information. Extensive experiments on three challenging video emotion benchmarks demonstrate that our method performs favorably against state-of-the-art approaches. The code is released on https://***/nku-zhichengzhang/WECL.

关键词： vision applications and systems

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Improving Visual Grounding by Encouraging Consistent Gradient-based Explanations

Improving Visual Grounding by Encouraging Consistent Gradien...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Yang, Ziyan Kafle, Kushal Dernoncourt, Franck Ordonez, Vicente Rice Univ Houston TX 77005 USA Adobe Res San Francisco CA USA

ISBN: (纸本)9798350301298

We propose a margin-based loss for tuning joint vision-language models so that their gradient-based explanations are consistent with region-level annotations provided by humans for relatively smaller grounding datasets. We refer to this objective as Attention Mask Consistency (AMC) and demonstrate that it produces superior visual grounding results than previous methods that rely on using vision-language models to score the outputs of object detectors. Particularly, a model trained with AMC on top of standard vision-language modeling objectives obtains a state-of-the-art accuracy of 86.49% in the Flickr30k visual grounding benchmark, an absolute improvement of 5.38% when compared to the best previous model trained under the same level of supervision. Our approach also performs exceedingly well on established benchmarks for referring expression comprehension where it obtains 80.34% accuracy in the easy test of RefCOCO+, and 64.55% in the difficult split. AMC is effective, easy to implement, and is general as it can be adopted by any vision-language model, and can use any type of region annotations.

关键词： language reasoning vision

来源：评论

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Architectural Backdoors in Neural Networks

Architectural Backdoors in Neural Networks

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Bober-Irizar, Mikel Shumailov, Ilia Zhao, Yiren Mullins, Robert Papernot, Nicolas Univ Cambridge Cambridge England Vector Inst Toronto ON Canada Univ Oxford Oxford England Imperial Coll London London England Univ Toronto Toronto ON Canada

ISBN: (纸本)9798350301298

Machine learning is vulnerable to adversarial manipulation. Previous literature demonstrated that at the training stage attackers can manipulate data [14] and data sampling procedures [29] to control model behaviour. A common attack goal is to plant backdoors i.e. force the victim model to learn to recognise a trigger known only by the adversary. In this paper, we introduce a new class of backdoor attacks that hide inside model architectures i.e. in the inductive bias of the functions used to train. These backdoors are simple to implement, for instance by publishing open-source code for a backdoored model architecture that others will reuse unknowingly. We demonstrate that model architectural backdoors represent a real threat and, unlike other approaches, can survive a complete re-training from scratch. We formalise the main construction principles behind architectural backdoors, such as a connection between the input and the output, and describe some possible protections against them. We evaluate our attacks on computer vision benchmarks of different scales and demonstrate the underlying vulnerability is pervasive in a variety of common training settings.

关键词： accountability ethics in vision fairness privacy Transparency

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Learning Attribute and Class-Specific Representation Duet for Fine-grained Fashion Analysis

Learning Attribute and Class-Specific Representation Duet fo...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Jiao, Yang Gao, Yan Meng, Jingjing Shang, Tin Sun, Yi Amazon Seattle WA 98109 USA

ISBN: (纸本)9798350301298

Fashion representation learning involves the analysis and understanding of various visual elements at different granularities and the interactions among them. Existing works often learn fine-grained fashion representations at the attribute level without considering their relationships and inter-dependencies across different classes. In this work, we propose to learn an attribute and class-specific fashion representation duet to better model such attribute relationships and inter-dependencies by leveraging prior knowledge about the taxonomy of fashion attributes and classes. Through two sub-networks for the attributes and classes, respectively, our proposed an embedding network progressively learns and refines the visual representation of a fashion image to improve its robustness for fashion retrieval. A multi-granularity loss consisting of attribute-level and class-level losses is proposed to introduce appropriate inductive bias to learn across different granularities of the fashion representations. Experimental results on three benchmark datasets demonstrate the effectiveness of our method, which outperforms the state-of-the-art methods by a large margin.

关键词： detection recognition: Categorization retrieval

来源：评论

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Visual recognition by Request

Visual Recognition by Request

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Tang, Chufeng Xie, Lingxi Zhang, Xiaopeng Hu, Xiaolin Tian, Qi Tsinghua Univ Dept Comp Sci & Technol Beijing Peoples R China Huawei Inc Montreal PQ Canada Chinese Inst Brain Res CIBR Beijing Peoples R China Tsinghua Univ THBI McGovern Inst Brain Res IDGR Beijing Peoples R China

ISBN: (纸本)9798350301298

Humans have the ability of recognizing visual semantics in an unlimited granularity, but existing visual recognition algorithms cannot achieve this goal. In this paper, we establish a new paradigm named visual recognition by request (ViRReq1) to bridge the gap. The key lies in decomposing visual recognition into atomic tasks named requests and leveraging a knowledge base, a hierarchical and text-based dictionary, to assist task definition. ViRReq allows for (i) learning complicated whole-part hierarchies from highly incomplete annotations and (ii) inserting new concepts with minimal efforts. We also establish a solid baseline by integrating language-driven recognition into recent semantic and instance segmentation methods, and demonstrate its flexible recognition ability on CPP and ADE20K, two datasets with hierarchical whole-part annotations.

关键词： grouping and shape analysis Segmentation

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Graph Representation for Order-aware Visual Transformation

Graph Representation for Order-aware Visual Transformation

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Qiu, Yue Sun, Yanjun Matsuzawa, Fumiya Iwata, Kenji Kataoka, Hirokatsu Natl Inst Adv Ind Sci & Technol Tokyo Japan

ISBN: (纸本)9798350301298

This paper proposes a new visual reasoning formulation that aims at discovering changes between image pairs and their temporal orders. Recognizing scene dynamics and their chronological orders is a fundamental aspect of human cognition. The aforementioned abilities make it possible to follow step-by-step instructions, reason about and analyze events, recognize abnormal dynamics, and restore scenes to their previous states. However, it remains unclear how well current AI systems perform in these capabilities. Although a series of studies have focused on identifying and describing changes from image pairs, they mainly consider those changes that occur synchronously, thus neglecting potential orders within those changes. To address the above issue, we first propose a visual transformation graph structure for conveying order-aware changes. Then, we bench-marked previous methods on our newly generated dataset and identified the issues of existing methods for change order recognition. Finally, we show a significant improvement in order-aware change recognition by introducing a new model that explicitly associates different changes and then identifies changes and their orders in a graph representation.

关键词： and reasoning language vision

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Region-Aware Pretraining for Open-Vocabulary Object Detection with vision Transformers

Region-Aware Pretraining for Open-Vocabulary Object Detectio...

引用

ieee/cvf conference on computer vision and pattern recognition (cvpr)

作者： Kim, Dahun Angelova, Anelia Kuo, Weicheng Google Res Brain Team Mountain View CA 94043 USA

ISBN: (纸本)9798350301298

We present Region-aware Open-vocabulary vision Transformers (RO-ViT) - a contrastive image-text pretraining recipe to bridge the gap between image-level pretraining and open-vocabulary object detection. At the pretraining phase, we propose to randomly crop and resize regions of positional embeddings instead of using the whole image positional embeddings. This better matches the use of positional embeddings at region-level in the detection finetuning phase. In addition, we replace the common softmax cross entropy loss in contrastive learning with focal loss to better learn the informative yet difficult examples. Finally, we leverage recent advances in novel object proposals to improve open-vocabulary detection finetuning. We evaluate our full model on the LVIS and COCO open-vocabulary detection benchmarks and zero-shot transfer. RO-ViT achieves a state-of-the-art 32.1 AP(r) on LVIS, surpassing the best existing approach by +5.8 points in addition to competitive zero-shot transfer detection. Surprisingly, RO-ViT improves the image-level representation as well and achieves the state of the art on 9 out of 12 metrics on COCO and Flickr image-text retrieval benchmarks, outperforming competitive approaches with larger models.

关键词： language reasoning vision

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