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检索条件"机构=Image and Pattern Recognition Laboratory"

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Accurate Laser Line Extraction Algorithm Based on Morphological Features under Strong Interference 12

Accurate Laser Line Extraction Algorithm Based on Morphologi...

引用

SPIE 12th International Symposium on Multispectral image Processing and pattern recognition, MIPPR 2023

作者： Wu, Yuanzhe Ye, Liang Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan430205 China Hubei Engineering Research Center of Video Image and HD Projection Wuhan430205 China School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan430205 China

ISBN: (数字)9781510675001

ISBN: (纸本)9781510674998

In outdoor complex lighting environments, laser stripe extraction becomes challenging due to the possibility of strong exposures in the external environment as well as reflective interference on the road surface. In order to overcome these problems, this paper proposes a multi-feature structured light extraction algorithm based on seed neighborhoods, which utilizes multiple seed points and comprehensively considers the laser stripe features, especially the morphological features of the optical stripes in their surrounding neighborhoods, so as to obtain the approximate distribution location of the real laser stripe. Finally, the laser streak extraction is performed by the gradient difference of the optical streak boundary as well as its own brightness. The experimental results show that the method is still effective in extracting laser lines even in high exposure environments where there are interferences such as reflections on the road surface. © 2024 SPIE.

关键词： Luminance

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Electroencephalogram-based dynamic continuous emotion recognition method

Electroencephalogram-based dynamic continuous emotion recogn...

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2024 International Conference on Computer Graphics, Artificial Intelligence, and Data Processing, ICCAID 2024

作者： Liu, Yong Jie, Lilin Li, Zhengxiu Zou, Yangmeng Li, Junhua Key Laboratory of Jiangxi Provincial for Image Processing and Pattern Recognition Nanchang Hangkong University Nanchang 330036 China School of Instrument Science and Optoelectronic Engineering Nanchang Hangkong University Nanchang 330036 China

ISBN: (纸本)9781510689275

Human emotions are dynamic and influenced by external circumstances, social interactions, and an individual's internal state. However, existing electroencephalogram (EEG) emotion recognition research often focuses on static scenarios and does not fully account for the continuity of dynamic emotions. To overcome these limitations, this paper proposes an dynamic continuous emotion recognition approach based on EEG signals. Firstly, a novel experimental paradigm was designed to cover six emotion transition scenarios: calm to happy, happy to calm, sad to calm, calm to sad, nervous to calm, and calm to nervous. EEG signals were collected from 24 subjects using a 64-channel EEG device. These signals were assigned dynamic continuous emotional labels, which were normalized to ensure consistency. Secondly, the brain was divided into four zones: frontal, parietal, occipital and temporal. Five regression algorithms with good performance were selected for integration. A dynamic emotion recognition model was then constructed, which included a regional feature extraction module and an integrated regression module, aiming at identifying EEG emotions in dynamic situations. Finally, the differential entropy feature was tested, and the results showed the specificity of different brain zones in recognizing the six dynamic emotions. Moreover, the proposed model achieved lower mean square errors in valence and arousal. Compared to six machine learning models and deep learning models, namely SVRrbf, KNN, DT, RF, CNN, and GRU, the proposed model demonstrates higher recognition accuracy. © 2025 SPIE.

关键词： brain region segmentation Dynamic emotion recognition EEG feature extraction recognition model

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An Improved Watershed Foreign Object Detection of Road Surface Based on Adaptive Gaussian Threshold 12

An Improved Watershed Foreign Object Detection of Road Surfa...

引用

SPIE 12th International Symposium on Multispectral image Processing and pattern recognition, MIPPR 2023

作者： Liang, Yongjie Tian, Keyun Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan430205 China Hubei Engineering Research Center of Video Image and HD Projection Wuhan430205 China School of Electrical and Information Engineering Wuhan Institute of Technology Wuhan430205 China

ISBN: (数字)9781510675001

ISBN: (纸本)9781510674998

To a certain extent, foreign objects on road surfaces can cause damage to vehicles and increase the risk of accidents, which is even more immeasurably harmful in such special scenarios as airports. Effective detection of foreign objects on road surfaces is of great significance to airport flight safety and road safety maintenance. Due to the traditional watershed segmentation method in the recognition of foreign objects, there are obvious over-segmentation, noise complexity and so on. Therefore, this paper proposes an improved watershed segmentation method based on Lab-color space using image filtering techniques and morphological operations to initially separate the image foreground and background, combined with Adaptive Gaussian thresholding, labeling method for detection. This effectively solves the problem of over-segmentation, can better suppress image noise, and accurately detects foreign objects on road surfaces. © 2024 SPIE.

关键词： Object detection

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Combining Attention Mechanism and Local-Global Features Association Network for Vehicle Re-identification 22

Combining Attention Mechanism and Local-Global Features Asso...

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Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Cai-Xia Li Xia Du Yun Wu Da-Han Wang Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

Vehicle re-identification (Re-ID) aims to retrieve the target vehicle from a large dataset composed of vehicle images captured by multiple cameras. Most vehicles are difficult to recognize in the environment of low resolution, occlusion, and viewpoint change, which brings challenges to vehicle Re-ID. Existing work usually uses additional attribute information to distinguish different vehicles, such as color, viewpoint, and model. However, this requires expensive manual annotation. Therefore, we propose a three-branch network based on attention mechanism and local-global feature association (AM-LGFA) to improve the accuracy of vehicle Re-ID. In the global branch, the global features of the vehicle are extracted. A multi-scale channel attention module is introduced into the attention branch to suppress irrelevant information and extract important channel features. The features extracted from the backbone are divided into different stripe features in the horizontal direction in the local branch. Then connect each stripe feature with the global information to enhance the context between features. Finally, the features extracted from the three branches are concatenated as the feature representation of the test phase. The experimental results show that the features extracted by the AM-LGFA network are complementary. The effectiveness of this method is verified on two challenging public datasets, VehicleID and VeRi-776.

关键词： Attention mechanism Vehicle re-identification Local-global feature association

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A Lightweight Brain Tumor Segmentation Network Based on 3D Inverted Residual Modules 22

A Lightweight Brain Tumor Segmentation Network Based on 3D I...

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Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Yuchao Liu Xia Du Da-Han Wang Shunzhi Zhu Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

Semantic segmentation technology based on deep learning has played an important role for doctors in identifying brain tumor regions and formulating treatment plans. Popular automated segmentation methods for brain tumors include 2D and 3D convolution networks. The 3D networks give better results but lead to a significant increase in parameters and computational cost. In this paper, we propose a lightweight brain tumor segmentation network composed of 3D inverted residual modules, which can significantly reduce the computational complexity of 3D models. Based on a lightweight depthwise separable convolution, our 3D inverted residual module extracts high-dimensional brain tumor features through an intermediate expansion layer, thus improving performance. On the brain tumor dataset BraTS 2018, our network achieves dice scores of 80.8%, 90.7%, and 84.3% (for ET, WT, and TC, respectively) with only 0.68M parameters and 51.46G FLOPs. The results show that our method can significantly reduce the complexity of the 3D model and achieve very competitive performance.

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ResAsapp: An Effective Convolution to Distinguish Adjacent Pixels For Scene Text Detection 22

ResAsapp: An Effective Convolution to Distinguish Adjacent P...

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Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Kangming Weng Xia Du Kunze Chen Dahan Wang Shunzhi Zhu Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

The segmentation-based approach is an essential direction of scene text detection, and it can detect arbitrary or curved text, which has attracted the increasing attention of many researchers. However, extensive research has shown that the segmentation-based method will be disturbed by adjoining pixels and cannot effectively identify the text boundaries. To tackle this problem, we proposed a ResAsapp Conv based on the PSE algorithm. This convolution structure can provide different scale visual fields about the object and make it effectively recognize the boundary of texts. The method's effectiveness is validated on three benchmark datasets, CTW1500, Total-Text, and ICDAR2015 datasets. In particular, on the CTW1500 dataset, a dataset full of long curve text in all kinds of scenes, which is hard to distinguish, our network achieves an F-measure of 81.2%.

关键词： Pixel Interference Scene Text Detection Curved Text

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Swin Transformer with Multi-Scale Residual Attention for Semantic Segmentation of Remote Sensing images 22

Swin Transformer with Multi-Scale Residual Attention for Sem...

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Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Yuanyang Lin Da-han Wang Yun Wu Shunzhi Zhu Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

Semantic segmentation of remote sensing images usually faces the problems of unbalanced foreground-background, large variation of object scales, and significant similarity of different classes. The FCN-based fully convolutional encoder-decoder architecture seems to have become the standard for semantic segmentation, and this architecture is also prevalent in remote sensing images. However, because of the limitations of CNN, the encoder cannot obtain global contextual information, which is extraordinarily important to the semantic segmentation of remote sensing images. By contrast, in this paper, the CNN-based encoder is replaced by Swin Transformer to obtain rich global contextual information. Besides, for the CNN-based decoder, we propose a multi-level connection module (MLCM) to fuse high-level and low-level semantic information to help feature maps obtain more semantic information and use a multi-scale upsample module (MSUM) to join the upsampling process to recover the resolution of images better to get segmentation results preferably. The experimental results on the ISPRS Vaihingen and Potsdam datasets demonstrate the effectiveness of our proposed method.

关键词： Dilated Convolution Semantic Segmentation Remote Sensing Swin Transformer

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Multi-Scale Features Integration for Handwritten Mathematical Expression recognition 22

Multi-Scale Features Integration for Handwritten Mathematica...

引用

Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Xianghao Liu Da-Han Wang Shunzhi Zhu Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

Handwritten mathematical expression recognition (HMER) is a challenging task due to the complex two-dimensional structure of mathematical expressions and the similarity of handwritten texts. Most existing methods for HMER only consider single-scale features while ignoring multi-scale features that are very important to HMER. Few works have explored the fusion of multi-scale features in HMER, but exhibited an extra branch that brings more parameters and computation. In this paper, we propose an end-to-end method to integrate multi-scale features using a unified model. Specifically, we customized the Dense Atrous Spatial Pyramid Pooling (DenseASPP) to our backbone network to capture the multi-scale features of the input image meanwhile expanding the receptive fields. Moreover, we added a symbol classifier using focal loss to better discriminate and recognize similar symbols, to further improve the performance of HMER. Experiments on the Competition on recognition of Online Handwritten Mathematical Expressions (CROHME) 2014, 2016 and 2019 shows that the proposed method achieves superior performance to most state-of-the-art methods, demonstrating the effectiveness of the proposed method.

关键词： Multi-Scale Handwritten Mathematical Expression recognition, Dense Atrous Spatial Pyramid Pooling, Symbol Classifier

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Multi-Scale Channel Attention for Chinese Scene Text recognition 22

Multi-Scale Channel Attention for Chinese Scene Text Recogni...

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Proceedings of the 2022 11th International Conference on Computing and pattern recognition

作者： Haiqing Liao Xia Du Yun Wu Da-Han Wang Fujian Key Laboratory of Pattern Recognition and Image Understanding Xiamen University of Technology China

ISBN: (纸本)9781450397056

Scene text recognition have proven to be highly effective in solving various computer vision tasks. Recently, numerous recognition algorithms based on the encoder-decoder framework have been proposed for handling scene texts with perspective distortion and curve shape. Nevertheless, most of these methods only consider single-scale features while not taking multi-scale features into account. Meanwhile, the existing text recognition methods are mainly used for English texts, whereas ignoring Chinese texts' pivotal role. In this paper, we proposed an end-to-end method to integrate multi-scale features for Chinese scene text recognition (CSTR). Specifically, we adopted and customized the Dense Atrous Spatial Pyramid Pooling (DenseASPP) to our backbone network to capture multi-scale features of the input image while simultaneously extending the receptive fields. Moreover, we added Squeeze-and-Excitation Networks (SE) to capture attentional features with global information to improve the performance of CSTR further. The experimental results of the Chinese scene text datasets demonstrate that the proposed method can efficiently mitigate the impacts of the loss of contextual information caused by the text scale varying and outperforms the state-of-the-art approaches.

关键词： Chinese Scene Text recognition Multi-scale Dense Atrous Spatial Pyramid Pooling

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An Improved Bilateral Filtering Based on Curvature Feature for Point Cloud Denoising in Road Surface Detection 12

An Improved Bilateral Filtering Based on Curvature Feature f...

引用

SPIE 12th International Symposium on Multispectral image Processing and pattern recognition, MIPPR 2023

作者： Chen, Si Hubei Key Laboratory of Optical Information and Pattern Recognition Wuhan430205 China Hubei Engineering Research Center of Video Image and HD Projection Wuhan430205 China School of Electrical and Information Technology Wuhan Institute of Technology Wuhan430205 China

ISBN: (数字)9781510675001

ISBN: (纸本)9781510674998

To effectively remove noise from the point clouds obtained for road surface defect detection while preserving the feature information, a bilateral filtering algorithm based on curvature features is proposed for denoising road surface defect point clouds. First, divide the noise points in the point cloud into several regions based on their distribution characteristics and curvature features. Then use statistical filtering to remove noise points in the obvious noise area and the flat area. Finally, an improved bilateral filtering algorithm is applied to smooth the noise points in the complex detail area. © 2024 SPIE.

关键词： Surface defects

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