Pingping Zhang

ORCID: 0000-0003-1206-1444
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About
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Research Areas
  • Video Surveillance and Tracking Methods
  • Advanced Neural Network Applications
  • Visual Attention and Saliency Detection
  • Advanced Image and Video Retrieval Techniques
  • Human Pose and Action Recognition
  • Advanced Image Fusion Techniques
  • Gait Recognition and Analysis
  • Face recognition and analysis
  • Image Enhancement Techniques
  • Remote-Sensing Image Classification
  • Face Recognition and Perception
  • Multimodal Machine Learning Applications
  • Remote Sensing and Land Use
  • Advanced Image Processing Techniques
  • Anomaly Detection Techniques and Applications
  • Image and Signal Denoising Methods
  • Sparse and Compressive Sensing Techniques
  • Natural Language Processing Techniques
  • Image Retrieval and Classification Techniques
  • Domain Adaptation and Few-Shot Learning
  • Fire Detection and Safety Systems
  • Topic Modeling
  • Image and Video Quality Assessment
  • Advanced Vision and Imaging
  • Advanced Chemical Sensor Technologies

Dalian University of Technology
2016-2025

Hebei General Hospital
2024-2025

South China Agricultural University
2025

First Affiliated Hospital of Bengbu Medical College
2025

City University of Hong Kong
2022-2025

Second Military Medical University
2023-2024

Changhai Hospital
2023-2024

Harbin Engineering University
2024

Hebei University
2023

Chongqing University of Posts and Telecommunications
2022-2023

Fully convolutional neural networks (FCNs) have shown outstanding performance in many dense labeling problems. One key pillar of these successes is mining relevant information from features layers. However, how to better aggregate multi-level feature maps for salient object detection underexplored. In this work, we present Amulet, a generic aggregating framework detection. Our first integrates into multiple resolutions, which simultaneously incorporate coarse semantics and fine details. Then...

10.1109/iccv.2017.31 article EN 2017-10-01

Deep convolutional neural networks (CNNs) have delivered superior performance in many computer vision tasks. In this paper, we propose a novel deep fully network model for accurate salient object detection. The key contribution of work is to learn uncertain features (UCF), which encourage the robustness and accuracy saliency We achieve via introducing reformulated dropout (R-dropout) after specific layers construct an ensemble internal feature units. addition, effective hybrid upsampling...

10.1109/iccv.2017.32 article EN 2017-10-01

Deep convolutional neural networks (CNNs) have been successfully applied to a wide variety of problems in computer vision, including salient object detection. To detect and segment objects accurately, it is necessary extract combine high-level semantic features with low-levelfine details simultaneously. This happens be challenge for CNNs as repeated subsampling operations such pooling convolution lead significant decrease the initial image resolution, which results loss spatial finer...

10.1109/iccv.2017.433 article EN 2017-10-01

Retinex model-based methods have shown to be effective in layer-wise manipulation with well-designed priors for low-light image enhancement. However, the commonly used handcrafted and optimization-driven solutions lead absence of adaptivity efficiency. To address these issues, this paper, we propose a Retinex-based deep unfolding network (URetinex-Net), which unfolds an optimization problem into learnable decompose reflectance illumination layers. By formulating decomposition as implicit...

10.1109/cvpr52688.2022.00581 article EN 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2022-06-01

Deep networks have been proved to encode high-level features with semantic meaning and delivered superior performance in salient object detection. In this paper, we take one step further by developing a new saliency detection method based on recurrent fully convolutional (RFCNs). Compared existing deep network methods, the proposed is able incorpor- ate prior knowledge for more accurate inference. addition, architecture enables our automatically learn refine map iteratively correcting its...

10.1109/tpami.2018.2846598 article EN IEEE Transactions on Pattern Analysis and Machine Intelligence 2018-06-12

Deep neural network based methods have made a significant breakthrough in salient object detection. However, they are typically limited to input images with low resolutions (400×400 pixels or less). Little effort has been train networks directly handle segmentation high-resolution images. This paper pushes forward saliency detection, and contributes new dataset, named High-Resolution Salient Object Detection (HRSOD) dataset. To our best knowledge, HRSOD is the first detection dataset date....

10.1109/iccv.2019.00733 article EN 2021 IEEE/CVF International Conference on Computer Vision (ICCV) 2019-10-01

Recently, with the advance of deep Convolutional Neural Networks (CNNs), person Re-Identification (Re-ID) has witnessed great success in various applications.However, limited receptive fields CNNs, it is still challenging to extract discriminative representations a global view for persons under non-overlapped cameras.Meanwhile, Transformers demonstrate strong abilities modeling long-range dependencies spatial and sequential data.In this work, we take advantages both CNNs Transformers,...

10.1145/3474085.3475202 article EN Proceedings of the 30th ACM International Conference on Multimedia 2021-10-17

Visible-Infrared Person Re-Identification (VI-ReID) is a challenging retrieval task under complex modality changes. Existing methods usually focus on extracting discriminative visual features while ignoring the reliability and commonality of between different modalities. In this paper, we propose novel deep learning framework named Progressive Modality-shared Transformer (PMT) for effective VI-ReID. To reduce negative effect gaps, first take gray-scale images as an auxiliary progressive...

10.1609/aaai.v37i2.25273 article EN Proceedings of the AAAI Conference on Artificial Intelligence 2023-06-26

In this paper, we propose a novel feature learning framework for video person re-identification (re-ID). The proposed largely aims to exploit the adequate temporal information of sequences and tackle poor spatial alignment moving pedestrians. More specifically, exploiting information, design residual (TRL) module simultaneously extract generic specific features consecutive frames. TRL is equipped with two bi-directional LSTM (BiLSTM), which are respectively responsible describe in different...

10.1109/tip.2018.2878505 article EN IEEE Transactions on Image Processing 2018-10-30

Automated segmentation of liver tumors in contrast-enhanced abdominal computed tomography (CT) scans is essential assisting medical professionals to evaluate tumor development and make fast therapeutic schedule. Although deep convolutional neural networks (DCNNs) have contributed many breakthroughs image segmentation, this task remains challenging, since 2D DCNNs are incapable exploring the inter-slice information 3D too complex be trained with available small dataset. In paper, we propose...

10.24963/ijcai.2019/593 article EN 2019-07-28

Fully convolutional neural networks (FCNs) have shown outstanding performance in many dense labeling problems. One key pillar of these successes is mining relevant information from features layers. However, how to better aggregate multi-level feature maps for salient object detection underexplored. In this work, we present Amulet, a generic aggregating framework detection. Our first integrates into multiple resolutions, which simultaneously incorporate coarse semantics and fine details. Then...

10.48550/arxiv.1708.02001 preprint EN other-oa arXiv (Cornell University) 2017-01-01

Edge-preserving image smoothing is a fundamental procedure for many computer vision and graphic applications. There tradeoff between the quality processing speed: high usually requires computational cost, which leads to low speed. In this article, we propose new global optimization based method, named iterative least squares (ILS), efficient edge-preserving smoothing. Our approach can produce high-quality results but at much lower cost. Comprehensive experiments demonstrate that proposed...

10.1145/3388887 article EN ACM Transactions on Graphics 2020-06-06

Video-based person re-identification (Re-ID) aims to automatically retrieve video sequences of the same under non-overlapping cameras. To achieve this goal, it is key fully utilize abundant spatial and temporal cues in videos. Existing methods usually focus on most conspicuous image regions, thus they may easily miss out fine-grained clues due varieties sequences. address above issues, paper, we propose a novel Global-guided Reciprocal Learning (GRL) framework for video-based Re-ID....

10.1109/cvpr46437.2021.01313 article EN 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2021-06-01

Generating a high dynamic range (HDR) image from set of sequential exposures is challenging task for scenes. The most common approaches are aligning the input images to reference before merging them into an HDR image, but artifacts often appear in cases large scene motion. state-of-the-art method using deep learning can solve this problem effectively. In paper, we propose novel convolutional neural network generate HDR, which attempts produce more vivid images. key idea our coarse-to-fine...

10.1109/wacv.2019.00012 article EN 2019-01-01

Video-based person re-identification aims to associate the video clips of same across multiple non-overlapping cameras. Spatial-temporal representations can provide richer and complementary information between frames, which are crucial distinguish target when occlusion occurs. This paper proposes a novel Pyramid Spatial-Temporal Aggregation (PSTA) framework aggregate frame-level features progressively fuse hierarchical temporal into final video-level representation. Thus, short-term...

10.1109/iccv48922.2021.01181 article EN 2021 IEEE/CVF International Conference on Computer Vision (ICCV) 2021-10-01

Image smoothing is a fundamental procedure in applications of both computer vision and graphics. The required properties can be different or even contradictive among tasks. Nevertheless, the inherent nature one operator usually fixed thus cannot meet various requirements applications. In this paper, we first introduce truncated Huber penalty function which shows strong flexibility under parameter settings. A generalized framework then proposed with introduced function. When combined its...

10.1109/tpami.2021.3097891 article EN IEEE Transactions on Pattern Analysis and Machine Intelligence 2021-07-27

Abstract As a vital vision task, person re-identification (Re-ID) aims to retrieve the same under non-overlapping cameras. It is very challenging task due presence of complex backgrounds, diverse illuminations and different perspectives. In this work, we integrate advantages convolutional neural networks (CNNs) transformers, propose novel learning framework named multi-level transformer (CMT) for image-based Re-ID. More specifically, first scale-aware feature enhancement (SFE) module extract...

10.1007/s44267-023-00025-8 article EN cc-by Visual Intelligence 2023-10-13

10.1109/cvpr52733.2024.01620 article EN 2022 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR) 2024-06-16

Abstract Global climate change has altered the characteristics of conventional drought events, with an increasing number Slow droughts (SD) rapidly transitioning into Flash (FD). This study introduces a novel multi‐temporal scale identification framework (MTSDIF) that classifies historical agricultural events three types: SD, FD, and Slow‐to‐Flash Drought (SFD). Based on MTSDIF, GLDAS‐Noah root zone soil moisture dataset was used to analyze spatiotemporal characteristics, evolution, driving...

10.1029/2024wr037181 article EN cc-by Water Resources Research 2025-02-01
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