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IEEE International Conference on image processing

作者： Keren Fu Chen Gong Irene Y. H. Gu Jie Yang Pengfei Shi Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Department of Signals and Systems Chalmers University of Technology

ISBN: (纸本)9781479983407

Recently the Normalized cut (Ncut) has been introduced to salient object detection [1, 2]. In this paper we validate that instead of proposing new detection models that leverage the Ncut, the previous geodesic saliency detection model which computes shortest paths on a graph can be adapted to eigenvectors of the Ncut to produce superior performance. Since the Ncut partitions a graph in a normalized energy minimization fashion, resulting eigenvectors contain decent cluster information that can group visual contents. Combining it with the existing geodesic saliency detection is conducive to highlighting salient objects uniformly, yielding to improved detection accuracy. Experiments by comparing with 12 existing methods on four benchmark datasets show the proposed method significantly outperforms the original geodesic saliency model and achieves comparable performance to state-of-the-art methods.

关键词： Salient object detection Normalized cut Geodesic saliency Saliency map Geodesic Object detection Eigenvector Line graph

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Learning to transfer privileged ranking attribute for object classification

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Journal of Information and Computational Science 2015年第1期12卷 367-380页

作者： Wang, Shengzheng Yang, Jie Merchant Marine College Shanghai Maritime University Shanghai China Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Shanghai China

Learning Using Privileged Information (LUPI) provides an effective framework to solve the learning problem under situation of the asymmetric distribution of information between training and test time. It has been successfully applied in the category recognition, e.g., protein classification, hand-writing recognition, animal categorization, etc. However, in the existing methods, various semantic attributes, with the help of experts, were only simply translated into the feature vectors and considered as the privileged data, which restricts the LUPI to the simple applications since it is difficult to guarantee that the privileged data is similarly informative about the problem at hand as the original data. Therefore, this paper presents a novel approach based on an attribute-ranking learning algorithm to construct the example-oriented privileged data. The main idea is to provide an effective means to transfer the mid-level semantic attributes to the original training data. Namely, we first obtain a real-valued rank per attribute for each example indicating the relative strength of the attribute presence in all examples, and then the resulting attribute ranking results are used to generate the privileged data. The experimental results show that the proposed approach provides a promising means to apply the privileged ranking attributes, and further demonstrate significant improvements in classification accuracy on three typical databases: PubFig, OSR and AwA.

关键词： Object recognition

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Visual Tracking via Nonnegative Regularization Multiple Locality Coding

Visual Tracking via Nonnegative Regularization Multiple Loca...

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International Conference on Computer Vision Workshops (ICCV Workshops)

作者： Fanghui Liu Tao Zhou Jie Yang Irene Y. H. Gu Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University Dept. of Signals and Systems Chalmers University of Technology

ISBN: (纸本)9781467397124

This paper presents a novel object tracking method based on approximated Locality-constrained Linear Coding (LLC). Rather than using a non-negativity constraint on encoding coefficients to guarantee these elements nonnegative, in this paper, the non-negativity constraint is substituted for a conventional l2 norm regularization term in approximated LLC to obtain the similar nonnegative effect. And we provide a detailed and adequate explanation in theoretical analysis to clarify the rationality of this replacement. Instead of specifying fixed K nearest neighbors to construct the local dictionary, a series of different dictionaries with pre-defined numbers of nearest neighbors are selected. Weights of these various dictionaries are also learned from approximated LLC in the similar framework. In order to alleviate tracking drifts, we propose a simple and efficient occlusion detection method. The occlusion detection criterion mainly depends on whether negative templates are selected to represent the severe occluded target. Both qualitative and quantitative evaluations on several challenging sequences show that the proposed tracking algorithm achieves favorable performance compared with other state-of-the-art methods.

关键词： Dictionaries Encoding Target tracking Visualization Bismuth image reconstruction image coding

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Based on Space Geometry Method for Actuator Fault Detection and Isolation with Disturbances and Noises 33

Based on Space Geometry Method for Actuator Fault Detection ...

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第三十三届中国控制会议

作者： HOU Yandong JIN Yong CHENG Qianshuai Institute of Image Processing and Pattern Recognition Henan University

ISBN: (纸本)9781479947249

This paper investigates the application of space geometry method for actuator fault detection and isolation(FDI) with disturbance inputs and measurement noises. To achieve the input signals, disturbances and noises are decoupled from residuals. Then the residual generator is designed and the relevant parameters are solved for it. When there are residuals exceed the threshold value, we can detect the faults. It can obtain single and multiple actuators FDI because of the method which we proposed satisfies the one-to-one corresponding relationship between faults and residuals. Simulation results demonstrate effectiveness of our proposed algorithm.

关键词： Actuator fault,Residual generator,Space geometry method,FDI.

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A novel multi-sensor multiple model particle filter with correlated noises for maneuvering target tracking

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High Technology Letters 2014年第4期20卷 355-362页

作者：胡振涛 Fu Chunling Institute of Image Processing and Pattern Recognition Henan University School of Physics and Electronics Henan University

Aiming at the effective realization of particle filter for maneuvering target tracking in multi-sensor measurements,a novel multi-sensor multiple model particle filtering algorithm with correlated noises is *** with the kinetic evolution equation of target state,a multi-sensor multiple model particle filter is firstly constructed,which is also used as the basic framework of a new *** the new algorithm,in order to weaken the adverse influence from random measurement noises in the measuring process of particle weight,a weight optimization strategy is introduced to improve the reliability and stability of particle *** addition,considering the correlated noise existing in the practical engineering,a decoupling method of correlated noise is given by the rearrangement and transformation of the state transition equation and measurement *** the weight optimization strategy and noise decoupling method adopt respectively the center fusion structure and the off-line way,it improves the adverse effect effectively on computational complexity for increasing state dimension and sensor ***,the theoretical analysis and experimental results show the feasibility and efficiency of the proposed algorithm.

关键词： multi-sensor information fusion weight optimization correlated noises maneuvering target tracking

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Automated multi-contrast brain pathological area extraction from 2D MR images

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Journal of Applied Research and Technology 2015年第1期13卷 58-69页

作者： Dvořák, P. Bartušek, K. Kropatsch, W.G. Smékal, Z. Institute of Scientific Instruments of the ASCR V.v.i Academy if Sciences of the Czech Republic Brno Czech Republic Dept. of Telecommunications Faculty of Electrical Engineering and Communication Brno University of Technology Brno Czech Republic Pattern Recognition and Image Processing Group Institute of Computer Graphics and Algorithms Faculty of Informatics Vienna University of Technology Vienna Austria

The aim of this work is to propose the fully automated pathological area extraction from multi-parametric 2D MR images of brain. The proposed method is based on multi-resolution symmetry analysis and automatic thresholding. The proposed algorithm first detects the presence of pathology and then starts its extraction. T2 images are used for the presence detection and the multi-contrast MRI is used for the extraction, concretely T2 and FLAIR images. The extraction is based on thresholding, where Otsu's algorithm is used for the automatic determination of the threshold. Since the method is based on symmetry, it works for both axial and coronal planes. In both these planes of healthy brain, the approximate left-right symmetry exists and it is used as the prior knowledge for searching the approximate pathology location. It is assumed that this area is not located symmetrically in both hemispheres, which is met in most cases. The detection algorithm was tested on 203 T2-weighted images and reached the true positive rate of 87.52% and true negative rate of 93.14%. The extraction algorithm was tested on 357 axial and 443 coronal real images from publicly available BRATS databases containing 3D volumes brain tumor patients. The results were evaluated by Dice Coefficient (axial: 0.85 ± 0.11, coronal 0.82 ± 0.18) and by Accuracy (axial: 0.96 ± 0.05, coronal 0.94 ± 0.09). © 2015 Universidad Nacional Autónoma de México.

关键词： Brain Pathology Brain Tumor MRI Multi-contrast MRI Symmetry Analysis

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An image fusion method of multi-scale image based on HMM and genetic algorithms

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Journal of Computational Information Systems 2015年第12期11卷 4367-4374页

作者： Jiang, Zetao Wu, Donghui The Institute of Computer Science and Engineering Guilin University of Electronic Technology Guilin China The Key Lab of Image Processing and Pattern Recognition of Jiangxi Province Nanchang Hangkong University Nanchang China

At present, in the field of pixel-level image fusion, researchers tend to treat each pixel independently, which destroys the relationship between the images to be fused. In view of this defects, this paper aims to propose a method for multi-scale image fusion based on Genetic Algorithm (GA) under the guidance of Hidden Markov Model (HMM). This fusion method is set on the following principles. First of all, the wavelet transformation (WT) of the two images to be fused will be conducted. And then establish HMM for the fusion coefficients from high to low in descending hierarchical order. Finally, guided by HMM, the author applies GA to searching hierarchically for the optimal fusion coefficient. With this method, the best fusion effect will be achieved. This method take good advantage of the correlation information between the images to be fused so as to improve the fidelity and accuracy of the fusion. Given this, the author makes an empirical analysis on this fusion method, which proves to be feasible and effective. ©, 2015, Binary Information Press. All right reserved.

关键词： Genetic algorithms

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Saliency detection via foreground rendering and background exclusion

Saliency detection via foreground rendering and background e...

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作者： Li, Yijun Fu, Keren Zhou, Lei Qiao, Yu Yang, Jie Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University China

ISBN: (纸本)9781479957514

In this paper, a novel approach for image visual saliency detection is proposed from both the salient object (foreground) and the background perspective. To better highlight the salient object, we start from what is a salient object and adopt priors including contrast prior and center prior to measure the dissimilarity between different image elements. To better suppress the background, we focus on what is the background and measure the pixel-wise saliency by the minimum seam cost where the seam is an optimal 8-connected path from the pixel to some boundary pixel. The final saliency map is obtained by the combination of two measure systems which leads to the goal of both highlighting the salient object and suppressing the background. Both qualitative and quantitative experiments conducted on a benchmark dataset show that our approach outperforms seven state-of-the-art methods. © 2014 IEEE.

关键词： Pixels

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Conventional mammographic image generation method with increased calcification sensitivity based on dual-energy

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12th International Workshop on Breast Imaging, IWDM 2014

作者： Chen, Xi Mou, Xuanqin Institute of Image Processing and Pattern Recognition Xi'an Jiaotong University Xi'an Shaanxi China

ISBN: (纸本)9783319078861

The visualization of calcifications could be obscured in mammograms because of overlapping of tissue structures. Dual-energy digital mammography (DEDM) can generate tissue-subtracted image for improving the detectability of breast calcifications, but the mass information is missing. This paper proposes a conventional mammographic image generation method with increased calcification sensitivity based on DEDM. Firstly, a conventional mammographic image is generated with low-energy and high-energy images based on multi-scale decomposition and reconstruction. Secondly, the tissue-subtracted "calcification image" is generated using a nonlinear inverse mapping function with calcification pixels marked. Finally, the density values of the marked calcification pixels in the reconstructed mammographic image are increased for better visualization. Preliminary results show that the proposed DEDM method can generate both calcification and conventional mammogram-like images and the calcification sensitivity is increased. The CNR of calcifications of 50% glandular ratio has been increased from 2.75 to 9.32. © 2014 Springer International Publishing.

关键词： Visualization

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Repetitive shapes detection using affine invariant constraints

Repetitive shapes detection using affine invariant constrain...

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2014 International Conference on Communication Technology and Application, CTA 2014

作者： Yang, Z.H. Dong, P. Institute of Image Processing and Pattern Recognition North China University of Technology Beijing China

ISBN: (纸本)9781845649302

This paper presents a novel approach for finding more accurate feature pairs which is not only invariant to affine transformation, but also deals with images with repetitive shapes. First, the more accurate and robust homographic transformation between different views could be calculated through bi-directional matching and appropriate selection of threshold. Second, an affine geometric property, ratios of areas of corresponding triangles are affine invariant, is used to obtain more feature pairs based on the first step. Experiments demonstrate that the proposed method outperforms the state-of-art ASIFT in the number of correct feature pairs and matching accuracy among images with repetitive patterns. © 2014 WIT Press.

关键词： Affine invariance ASIFT Feature points image matching Repetitive shapes

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