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学者姓名：毋立芳
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摘要 ：
In object detection of remote sensing images, anchor-free detectors often suffer from false boxes and sample imbalance, due to the use of single oriented features and the key point-based boxing strategy. This paper presents a simple and effective anchor-free approach-RatioNet with less parameters and higher accuracy for sensing images, which assigns all points in ground-truth boxes as positive samples to alleviate the problem of sample imbalance. In dealing with false boxes from single oriented features, global features of objects is investigated to build a novel regression to predict boxes by predicting width and height of objects and corresponding ratios of l_ratio and t_ratio, which reflect the location of objects. Besides, we introduce ratio-center to assign different weights to pixels, which successfully preserves high-quality boxes and effectively facilitates the performance. On the MS-COCO test–dev set, the proposed RatioNet achieves 49.7% AP. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
关键词 ：
Forecasting Forecasting Object detection Object detection Object recognition Object recognition Remote sensing Remote sensing
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| GB/T 7714 | Zhao, Kuan , Zhao, Boxuan , Wu, Lifang et al. Rationet: Ratio prediction network for object detection [J]. | Sensors , 2021 , 21 (5) : 1-14 . |
| MLA | Zhao, Kuan et al. "Rationet: Ratio prediction network for object detection" . | Sensors 21 . 5 (2021) : 1-14 . |
| APA | Zhao, Kuan , Zhao, Boxuan , Wu, Lifang , Jian, Meng , Liu, Xu . Rationet: Ratio prediction network for object detection . | Sensors , 2021 , 21 (5) , 1-14 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种结合图卷积神经网络的图像情感极性分类方法，涉及智能媒体计算和计算机视觉技术领域；首先对训练样本进行物体信息的提取，并用每张图片中的物体信息、视觉特征建立图模型；其次以图卷积网络对图模型中包含的物体交互信息提取，并与卷积神经网络的特征进行融合；然后将训练样本进行预处理后传入网络中，利用损失函数和优化器对模型的参数进行迭代更新直至达到收敛，完成训练；最后将测试数据送入网络中，得到模型对测试数据的预测结果以及分类准确率。本发明通过提取图像中物体在情感空间的交互特征使分类特征更符合物体的情感特征以及人类情感触发机理，在视觉特征的基础上增加高级语义特征，有助于提升情感分类算法在实际应用场景中的性能。
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| GB/T 7714 | 毋立芳 , 张恒 , 邓斯诺 et al. 一种结合图卷积神经网络的图像情感极性分类方法 : CN202110019810.1[P]. | 2021-01-07 . |
| MLA | 毋立芳 et al. "一种结合图卷积神经网络的图像情感极性分类方法" : CN202110019810.1. | 2021-01-07 . |
| APA | 毋立芳 , 张恒 , 邓斯诺 , 石戈 , 简萌 , 相叶 . 一种结合图卷积神经网络的图像情感极性分类方法 : CN202110019810.1. | 2021-01-07 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Weakly-supervised video object localization is a challenging yet important task. The system should spatially localize the object of interest in videos, where only the descriptive sentences and their corresponding video segments are given in the training stage. Recent efforts propose to apply image-based Multiple Instance Learning (MIL) theory in this video task, and propagate the supervision from the video into frames by applying different frame-weighting strategies. Despite their promising progress, the spatio-temporal correlation between different object regions in videos has been largely ignored. To fill the research gap, in this work we introduce a simple but effective feature expression and aggregation framework, which utilizes the self-attention mechanism to capture the latent spatio-temporal correlation between multimodal object features and design a multimodal interaction module to model the similarity between the semantic query in sentences and the object regions in videos. We conduct extensive experimental evaluation on the YouCookII and ActivityNet-Entities datasets, which demonstrates significant improvements over multiple competitive baselines. © 2021
关键词 ：
Computation theory Computation theory Object recognition Object recognition Semantics Semantics
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| GB/T 7714 | Wang, Mingui , Cui, Di , Wu, Lifang et al. Weakly-supervised video object localization with attentive spatio-temporal correlation [J]. | Pattern Recognition Letters , 2021 , 145 : 232-239 . |
| MLA | Wang, Mingui et al. "Weakly-supervised video object localization with attentive spatio-temporal correlation" . | Pattern Recognition Letters 145 (2021) : 232-239 . |
| APA | Wang, Mingui , Cui, Di , Wu, Lifang , Jian, Meng , Chen, Yukun , Wang, Dong et al. Weakly-supervised video object localization with attentive spatio-temporal correlation . | Pattern Recognition Letters , 2021 , 145 , 232-239 . |
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摘要 ：
Face presentation attack detection (PAD) has become a key component in face-based application systems. Typical face de-spoofing algorithms estimate the noise pattern of a spoof image to detect presentation attacks. These algorithms are device-independent and have good generalization ability. However, the noise modeling is not very effective because there is no ground truth (GT) with identity information for training the noise modeling network. To address this issue, we propose using the bona fide image of the corresponding subject in the training set as a type of GT called appr-GT with the identity information of the spoof image. A metric learning module is proposed to constrain the generated bona fide images from the spoof images so that they are near the appr-GT and far from the input images. This can reduce the influence of imaging environment differences between the appr-GT and GT of a spoof image. Extensive experimental results demonstrate that the reconstructed bona fide image and noise with high discriminative quality can be clearly separated from a spoof image. The proposed algorithm achieves competitive performance . (c) 2020 Published by Elsevier B.V.
关键词 ：
Identity constrain Identity constrain Metric learning Metric learning Noise modeling Noise modeling Presentation attack detection Presentation attack detection
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| GB/T 7714 | Xu, Yaowen , Wu, Lifang , Jian, Meng et al. Identity-constrained noise modeling with metric learning for face anti-spoofing [J]. | NEUROCOMPUTING , 2021 , 434 : 149-164 . |
| MLA | Xu, Yaowen et al. "Identity-constrained noise modeling with metric learning for face anti-spoofing" . | NEUROCOMPUTING 434 (2021) : 149-164 . |
| APA | Xu, Yaowen , Wu, Lifang , Jian, Meng , Zheng, Wei-Shi , Ma, Yukun , Wang, Zhuming . Identity-constrained noise modeling with metric learning for face anti-spoofing . | NEUROCOMPUTING , 2021 , 434 , 149-164 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
As the Internet confronts the multimedia explosion, it becomes urgent to investigate personalized recommendation for alleviating information overload and improving users' experience. Most personalized recommendation approaches pay their attention to collaborative filtering over users' interactions, which suffers greatly from the highly sparse interactions. In image recommendation, visual correlations among images that users consumed provide a piece of intrinsic evidence to reveal users' interests. It inspires us to investigate image recommendation over the dense visual graph of images instead of the sparse user interaction graph. In this paper, we propose a semantic manifold modularization-based ranking (MMR) for image recommendation. MMR leverages the dense visual manifold to propagate users' historical records and infer user-image correlations for image recommendation. Especially, it constrains interest propagation within semantic visual compact groups by manifold modularization to make a tradeoff between users' personality and graph smoothness in propagation. Experimental results demonstrate that user-consumed visual correlations play actively to capture users' interests, and the proposed MMR can infer user-image correlations via visual manifold propagation for image recommendation. (c) 2021 Elsevier Ltd. All rights reserved.
关键词 ：
Image recommendation Image recommendation Manifold propagation Manifold propagation Modularization Modularization User interest User interest
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| GB/T 7714 | Jian, Meng , Guo, Jingjing , Zhang, Chenlin et al. Semantic manifold modularization-based ranking for image recommendation [J]. | PATTERN RECOGNITION , 2021 , 120 . |
| MLA | Jian, Meng et al. "Semantic manifold modularization-based ranking for image recommendation" . | PATTERN RECOGNITION 120 (2021) . |
| APA | Jian, Meng , Guo, Jingjing , Zhang, Chenlin , Jia, Ting , Wu, Lifang , Yang, Xun et al. Semantic manifold modularization-based ranking for image recommendation . | PATTERN RECOGNITION , 2021 , 120 . |
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摘要 ：
Key frame extraction is an important manner of video summarization. It can be used to interpret video content quickly. Existing approaches first partition the entire video into video clips by shot boundary detection, and then, extract key frames by frame clustering. However, in most team-sport videos, a video clip usually includes many events, and it is difficult to extract the key frames related to all of these events accurately, because different events of a game shot can have features of similar appearance. As is well known, most events in team-sport videos are attack and defense conversions, which are related to global translation. Therefore, by using fine-grained partition based on the global motion, a shot could be further partitioned into more video clips, from which more key frames could be extracted and they are related to the events. In this study, global horizontal motion is introduced to further partition video clips into fine-grained video clips. Furthermore, global motion statistics are utilized to extract candidate key frames. Finally, the representative key frames are extracted based on the spatial-temporal consistence and hierarchical clustering, and the redundant frames are removed. A dataset called SportKF is built, which includes 25 videos of 197,878 frames in 112 min and 764 key frames from four types of sports (basketball, football, American football and field hockey). The experimental results demonstrate that the proposed scheme achieves state-of-the-art performance by introducing global motion statistics.
关键词 ：
Fine-grained video partition Fine-grained video partition Global motion statistics Global motion statistics Key frame Key frame Optical flow Optical flow Redundant frame removal Redundant frame removal
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| GB/T 7714 | Yuan, Yuan , Lu, Zhe , Yang, Zhou et al. Key frame extraction based on global motion statistics for team-sport videos [J]. | MULTIMEDIA SYSTEMS , 2021 . |
| MLA | Yuan, Yuan et al. "Key frame extraction based on global motion statistics for team-sport videos" . | MULTIMEDIA SYSTEMS (2021) . |
| APA | Yuan, Yuan , Lu, Zhe , Yang, Zhou , Jian, Meng , Wu, Lifang , Li, Zeyu et al. Key frame extraction based on global motion statistics for team-sport videos . | MULTIMEDIA SYSTEMS , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Motion information used in the existed video action recognition schemes is mixing of global motion(GM) and local motion(LM). In fact, GM & LM have their respective semantic concepts. Thus, it is promising to decouple GM and LM from the mixed motions. Numerous efforts have been made on the design of global motion models for video encoding, video dejittering, video denoising, and so on. Nevertheless, some of the models are too basic to cover the camera motions in action recognition while others are over-complicated. In this paper, we focus on the characteristic of the action recognition and propose a novel independent univariate GM model. It ignores camera rotation, which appears rarely in action recognition videos, and represents the GM in x and y direction respectively. Furthermore, GM is position invariant because it is from the universal camera motion. Pixels with global motions are subjected to the same parametric model and pixels with mixed motion can be seen as outliers. Motivated by this, we develop an iterative optimization scheme for GM estimation which removes the outlier points step by step and estimates global motions in a coarse-to-fine manner. Finally, the LM is estimated through a Spatio-temporal threshold-based method. Experimental results demonstrate that the proposed GM model makes a better trade-off between the model complexity and the robustness. And the iterative optimization scheme is more effective than the existed algorithms. The compared experiments using four popular action recognition models on UCF-101 (for action recognition) and NCAA (for group activity recognition) demonstrate that local motions are more effective than the mixed motions. © 2021
关键词 ：
Cameras Cameras Economic and social effects Economic and social effects Image coding Image coding Iterative methods Iterative methods Motion estimation Motion estimation Pixels Pixels Semantics Semantics Statistics Statistics Video signal processing Video signal processing
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| GB/T 7714 | Wu, Lifang , Yang, Zhou , Jian, Meng et al. Global motion estimation with iterative optimization-based independent univariate model for action recognition [J]. | Pattern Recognition , 2021 , 116 . |
| MLA | Wu, Lifang et al. "Global motion estimation with iterative optimization-based independent univariate model for action recognition" . | Pattern Recognition 116 (2021) . |
| APA | Wu, Lifang , Yang, Zhou , Jian, Meng , Shen, Jialie , Yang, Yuchen , Lang, Xianglong . Global motion estimation with iterative optimization-based independent univariate model for action recognition . | Pattern Recognition , 2021 , 116 . |
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摘要 ：
With the popularity of online opinion expressing, automatic sentiment analysis of images has gained considerable attention. Most methods focus on effectively extracting the sentimental features of images, such as enhancing local features through saliency detection or instance segmentation tools. However, as a high-level abstraction, the sentiment is difficult to accurately capture with the visual element because of the "affective gap". Previous works have overlooked the contribution of the interaction among objects to the image sentiment. We aim to utilize interactive characteristics of objects in the sentimental space, inspired by human sentimental principles that each object contributes to the sentiment. To achieve this goal, we propose a framework to leverage the sentimental interaction characteristic based on a Graph Convolutional Network (GCN). We first utilize an off-the-shelf tool to recognize objects and build a graph over them. Visual features represent nodes, and the emotional distances between objects act as edges. Then, we employ GCNs to obtain the interaction features among objects, which are fused with the CNN output of the whole image to predict the final results. Experimental results show that our method exceeds the state-of-the-art algorithm. Demonstrating that the rational use of interaction features can improve performance for sentiment analysis.
关键词 ：
convolutional neural networks convolutional neural networks graph convolutional networks graph convolutional networks sentiment classification sentiment classification visual sentiment analysis visual sentiment analysis
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| GB/T 7714 | Wu, Lifang , Zhang, Heng , Deng, Sinuo et al. Discovering Sentimental Interaction via Graph Convolutional Network for Visual Sentiment Prediction [J]. | APPLIED SCIENCES-BASEL , 2021 , 11 (4) . |
| MLA | Wu, Lifang et al. "Discovering Sentimental Interaction via Graph Convolutional Network for Visual Sentiment Prediction" . | APPLIED SCIENCES-BASEL 11 . 4 (2021) . |
| APA | Wu, Lifang , Zhang, Heng , Deng, Sinuo , Shi, Ge , Liu, Xu . Discovering Sentimental Interaction via Graph Convolutional Network for Visual Sentiment Prediction . | APPLIED SCIENCES-BASEL , 2021 , 11 (4) . |
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摘要 ：
Deep supervised hashing takes prominent advantages of low storage cost, high computational efficiency and good retrieval performance, which draws attention in the field of large-scale image retrieval. However, similarity-preserving, quantization errors and imbalanced data are still great challenges in deep supervised hashing. This paper proposes a pairwise similarity-preserving deep hashing scheme to handle the aforementioned problems in a unified framework, termed as Cosine Metric Supervised Deep Hashing with Balanced Similarity (BCMDH). BCMDH integrates contrastive cosine similarity and Cosine distance entropy quantization to preserve the original semantic distribution and reduce the quantization errors simultaneously. Furthermore, a weighted similarity measure with cosine metric entropy is designed to reduce the impact of imbalanced data, which adaptively assigns weights according to sample attributes (pos/neg and easy/hard) in the embedding process of similarity-preserving. The experimental results on four widely-used datasets demonstrate that the proposed method is capable of generating hash codes of high quality and improve large-scale image retrieval performance. © 2021
关键词 ：
Computational efficiency Computational efficiency Deep learning Deep learning Digital storage Digital storage Entropy Entropy Hash functions Hash functions Image enhancement Image enhancement Image retrieval Image retrieval Large dataset Large dataset Semantics Semantics
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| GB/T 7714 | Hu, Wenjin , Wu, Lifang , Jian, Meng et al. Cosine metric supervised deep hashing with balanced similarity [J]. | Neurocomputing , 2021 , 448 : 94-105 . |
| MLA | Hu, Wenjin et al. "Cosine metric supervised deep hashing with balanced similarity" . | Neurocomputing 448 (2021) : 94-105 . |
| APA | Hu, Wenjin , Wu, Lifang , Jian, Meng , Chen, Yukun , Yu, Hui . Cosine metric supervised deep hashing with balanced similarity . | Neurocomputing , 2021 , 448 , 94-105 . |
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摘要 ：
Purpose This paper aims to address the problem of uncertain product quality in digital light processing (DLP) three-dimensional (3D) printing, a scheme is proposed to qualitatively estimate whether a layer is printed with the qualified quality or not cured . Design/methodology/approach A thermochromic pigment whose color fades at 45 degrees C is prepared as the indicator and it is mixed with the resin. A visual surveillance framework is proposed to monitor the visual variation in a period of the entire curing process. The exposure region is divided into 30 x 30 sub-regions; gray-level variation curves (curing curves) in all sub-regions are classified as normal or abnormal and a corresponding printing control strategy is designed to improve the percentage of qualified printed objects. Findings The temperature variation caused by the releasing reaction heat on the exposure surface is consistent in different regions under the homogenized light intensity. The temperature in depth begins to rise at different times. The temperature in the regions near the light source rises earlier, and that far from the light source rises later. Thus, the color of resin mixed with the thermochromic pigment fades gradually over a period of the entire solidification process. The color variation in the regions with defects of bubbles, insufficient material filling, etc., is much different from that in the normal curing regions. Originality/value A temperature-sensitive organic chromatic chemical pigment is prepared to present the visual variation over a period of the entire curing process. A novel 3D printing scheme with visual surveillance is proposed to monitor the layer-wise curing quality and to timely stop the possible unqualified printing resulted from bubbles, insufficient material filling, etc.
关键词 ：
Curing curves Curing curves DLP 3D printing DLP 3D printing Indicator Indicator Organic thermochromic pigment Organic thermochromic pigment Solidification status Solidification status Visual surveillance Visual surveillance
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| GB/T 7714 | Wu, Lifang , Liu, Zechao , Guan, Yupeng et al. Visual presentation for monitoring layer-wise curing quality in DLP 3D printing [J]. | RAPID PROTOTYPING JOURNAL , 2021 . |
| MLA | Wu, Lifang et al. "Visual presentation for monitoring layer-wise curing quality in DLP 3D printing" . | RAPID PROTOTYPING JOURNAL (2021) . |
| APA | Wu, Lifang , Liu, Zechao , Guan, Yupeng , Cui, Kejian , Jian, Meng , Qin, Yuanyuan et al. Visual presentation for monitoring layer-wise curing quality in DLP 3D printing . | RAPID PROTOTYPING JOURNAL , 2021 . |
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