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2014 Vol. 36, No. 11
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2014, 36(11): 2541-2548.
doi: 10.3724/SP.J.1146.2014.00255
Abstract:
An image interpolation method based on structure component bidirectional diffusion is proposed in this paper, by which the edge diffusion in image magnification is effectively decreased and the sharpening edges are generated. In this method, the edge...
An image interpolation method based on structure component bidirectional diffusion is proposed in this paper, by which the edge diffusion in image magnification is effectively decreased and the sharpening edges are generated. In this method, the edge...
2014, 36(11): 2549-2555.
doi: 10.3724/SP.J.1146.2014.00446
Abstract:
The traditional Super-Resolution (SR) algorithms are very sensitive to image registration errors, model errors or noise, which limits their real utility. To enhance the robustness of SR algorithm, this paper improves the traditional SR algorithm from...
The traditional Super-Resolution (SR) algorithms are very sensitive to image registration errors, model errors or noise, which limits their real utility. To enhance the robustness of SR algorithm, this paper improves the traditional SR algorithm from...
2014, 36(11): 2556-2562.
doi: 10.3724/SP.J.1146.2013.01884
Abstract:
Generally, the patch-based image processing methods use Euclidean Distance as the criterion of similar patches, which is impossible to fully reveal the patch structures and brings about the existence of blocking effect in the reconstructed image. In ...
Generally, the patch-based image processing methods use Euclidean Distance as the criterion of similar patches, which is impossible to fully reveal the patch structures and brings about the existence of blocking effect in the reconstructed image. In ...
2014, 36(11): 2563-2570.
doi: 10.3724/SP.J.1146.2013.01762
Abstract:
Extensive experiments demonstrate that locally dense features are able to improve greatly performances of image classification, and the popular way is to conduct spatially uniform sampling for locally dense feature extraction. In this paper, a new me...
Extensive experiments demonstrate that locally dense features are able to improve greatly performances of image classification, and the popular way is to conduct spatially uniform sampling for locally dense feature extraction. In this paper, a new me...
2014, 36(11): 2571-2577.
doi: 10.3724/SP.J.1146.2013.01960
Abstract:
An optimization algorithm based on Spatial Constraint for Speeded Up Robust Feature (SURF) matching is proposed, called SC-SURF. First, SURF is used for the image feature point detection and matching. Then the matched points are ranked according to t...
An optimization algorithm based on Spatial Constraint for Speeded Up Robust Feature (SURF) matching is proposed, called SC-SURF. First, SURF is used for the image feature point detection and matching. Then the matched points are ranked according to t...
2014, 36(11): 2578-2585.
doi: 10.3724/SP.J.1146.2014.00271
Abstract:
Vision-based road detection is a popular area in research of driving security, however, detecting in complex road scenery is still a challenging topic. An approach is proposed to detect drivable road region from monocular images in urban environments...
Vision-based road detection is a popular area in research of driving security, however, detecting in complex road scenery is still a challenging topic. An approach is proposed to detect drivable road region from monocular images in urban environments...
2014, 36(11): 2586-2592.
doi: 10.3724/SP.J.1146.2013.01974
Abstract:
In automatic retinal image analysis, the location of the optic disk and macula fovea is the prerequisite for a system of computer aided diagnosis or automatic screening of diabetic retinopathy. This paper proposes a novel method to detect macular fir...
In automatic retinal image analysis, the location of the optic disk and macula fovea is the prerequisite for a system of computer aided diagnosis or automatic screening of diabetic retinopathy. This paper proposes a novel method to detect macular fir...
2014, 36(11): 2593-2599.
doi: 10.3724/SP.J.1146.2013.02029
Abstract:
The Detection and tracking of multi-target is a challenging issue under the condition with unknown and varied target number, especially when the Signal-to-Noise Ratio (SNR) is low. An improved Track-Before-Detect (TBD) method for multiple spread targ...
The Detection and tracking of multi-target is a challenging issue under the condition with unknown and varied target number, especially when the Signal-to-Noise Ratio (SNR) is low. An improved Track-Before-Detect (TBD) method for multiple spread targ...
2014, 36(11): 2600-2606.
doi: 10.3724/SP.J.1146.2013.01814
Abstract:
The Electronic Speckle Pattern Interferometry (ESPI) is widely used for deformation measurement and nondestructive testing of the optical rough surface in recent years. Removal of the speckle noise is of fundamental importance for accurate extraction...
The Electronic Speckle Pattern Interferometry (ESPI) is widely used for deformation measurement and nondestructive testing of the optical rough surface in recent years. Removal of the speckle noise is of fundamental importance for accurate extraction...
2014, 36(11): 2607-2613.
doi: 10.3724/SP.J.1146.2014.00068
Abstract:
Based on Hoff and Arbib s control theory of the minimum jerk, this paper presents a new control model with cerebellar-like structure which is able to account for the temporal coordination of arm transport and hand preshape during reach and grasp task...
Based on Hoff and Arbib s control theory of the minimum jerk, this paper presents a new control model with cerebellar-like structure which is able to account for the temporal coordination of arm transport and hand preshape during reach and grasp task...
2014, 36(11): 2614-2620.
doi: 10.3724/SP.J.1146.2013.01909
Abstract:
In the Time Difference Of Arrival (TDOA) measurement system, the performance of time difference estimation degrades due to the inevitable presence of phase noises of local oscillators at spatially separated receivers. The effect of the phase noise on...
In the Time Difference Of Arrival (TDOA) measurement system, the performance of time difference estimation degrades due to the inevitable presence of phase noises of local oscillators at spatially separated receivers. The effect of the phase noise on...
2014, 36(11): 2621-2627.
doi: 10.3724/SP.J.1146.2013.01578
Abstract:
A new method for estimating parameters of quadratic frequency modulated signals is proposed basing on a product kernel function. Firstly, the signal is multiplied by its conjugate reverse signal with the phase-matching transformation being performed,...
A new method for estimating parameters of quadratic frequency modulated signals is proposed basing on a product kernel function. Firstly, the signal is multiplied by its conjugate reverse signal with the phase-matching transformation being performed,...
2014, 36(11): 2628-2632.
doi: 10.3724/SP.J.1146.2013.01817
Abstract:
The traditional polarization sensitive array signal processing methods, e.g. parameter estimation and beamformimg, can not achieve excellent performance under the situation of coherent signal sources. An improved decorrelation algorithm is proposed b...
The traditional polarization sensitive array signal processing methods, e.g. parameter estimation and beamformimg, can not achieve excellent performance under the situation of coherent signal sources. An improved decorrelation algorithm is proposed b...
2014, 36(11): 2633-2639.
doi: 10.3724/SP.J.1146.2013.01796
Abstract:
To solve the problem that in two-dimensional imaging the target under water is easily hidden by the strong coherent interference, and high side lobe of arc array beam pattern causes more false alarm, an optimized two-dimensional imaging method based ...
To solve the problem that in two-dimensional imaging the target under water is easily hidden by the strong coherent interference, and high side lobe of arc array beam pattern causes more false alarm, an optimized two-dimensional imaging method based ...
2014, 36(11): 2640-2645.
doi: 10.3724/SP.J.1146.2014.00234
Abstract:
In this paper, an adaptive belief difference-map propagation algorithm with low complexity is proposed for short and middle length LDPC regular codes by modifying message update rules and transforming factor graph. To improve decoding performance, a ...
In this paper, an adaptive belief difference-map propagation algorithm with low complexity is proposed for short and middle length LDPC regular codes by modifying message update rules and transforming factor graph. To improve decoding performance, a ...
2014, 36(11): 2646-2651.
doi: 10.3724/SP.J.1146.2013.01624
Abstract:
A new form of Chirp Scaling (CS) algorithm based on Chebyshev polynomials in Synthetic Aperture Radar is proposed in this paper. Instead of Taylor series expansion, the Chebyshev polynomials is used to approximate the two-dimensional frequency spectr...
A new form of Chirp Scaling (CS) algorithm based on Chebyshev polynomials in Synthetic Aperture Radar is proposed in this paper. Instead of Taylor series expansion, the Chebyshev polynomials is used to approximate the two-dimensional frequency spectr...
2014, 36(11): 2652-2658.
doi: 10.3724/SP.J.1146.2013.01875
Abstract:
Modern high-resolution radar obtains high resolution in down-range dimension from wideband waveform and high resolution in cross-range dimension from large aperture. In this paper, a beam is formed using Frequency Diversity (FD) coherent processing b...
Modern high-resolution radar obtains high resolution in down-range dimension from wideband waveform and high resolution in cross-range dimension from large aperture. In this paper, a beam is formed using Frequency Diversity (FD) coherent processing b...
2014, 36(11): 2659-2665.
doi: 10.3724/SP.J.1146.2013.01803
Abstract:
In multichannel Synthetic Aperture Radar-Ground Moving Targets Indication (SAR-GMTI) systems, three problems are led by utilizing the conventional Post Doppler-Space-Time Adaptive Processing (PD-STAP) technique. Firstly, the target Doppler spectrum i...
In multichannel Synthetic Aperture Radar-Ground Moving Targets Indication (SAR-GMTI) systems, three problems are led by utilizing the conventional Post Doppler-Space-Time Adaptive Processing (PD-STAP) technique. Firstly, the target Doppler spectrum i...
2014, 36(11): 2666-2671.
doi: 10.3724/SP.J.1146.2013.01925
Abstract:
A joint detection and tracking processing algorithm is proposed in this paper with constant false alarm rate property. Under the precondition that the average false alarm rate of the gate is fixed, the aim is to improve the target detection probabili...
A joint detection and tracking processing algorithm is proposed in this paper with constant false alarm rate property. Under the precondition that the average false alarm rate of the gate is fixed, the aim is to improve the target detection probabili...
2014, 36(11): 2672-2677.
doi: 10.3724/SP.J.1146.2013.01963
Abstract:
Frequency Modulated Continuous Wave (FMCW) array antenna SAR system combines the FMCW and array antenna imaging technology, which is of abroad interest in both civil and military applications. While in practical FMCW array SAR, the presents of unavoi...
Frequency Modulated Continuous Wave (FMCW) array antenna SAR system combines the FMCW and array antenna imaging technology, which is of abroad interest in both civil and military applications. While in practical FMCW array SAR, the presents of unavoi...
2014, 36(11): 2678-2683.
doi: 10.3724/SP.J.1146.2013.01895
Abstract:
The present study aims to investigate the Cramer-Rao Bound (CRB) for estimating the direction and velocity of the moving target using the moving bistatic MIMO radar system in the clutter environment. Firstly, the bistatic MIMO radar signal model with...
The present study aims to investigate the Cramer-Rao Bound (CRB) for estimating the direction and velocity of the moving target using the moving bistatic MIMO radar system in the clutter environment. Firstly, the bistatic MIMO radar signal model with...
2014, 36(11): 2684-2690.
doi: 10.3724/SP.J.1146.2013.01769
Abstract:
To resolve the problem of fast-moving target detection and imaging in Frequency Modulated Continuous Wave SAR (FMCW-SAR), a new method of moving target detection and imaging in double-channel FMCW-SAR is presented in this paper. Considering the inher...
To resolve the problem of fast-moving target detection and imaging in Frequency Modulated Continuous Wave SAR (FMCW-SAR), a new method of moving target detection and imaging in double-channel FMCW-SAR is presented in this paper. Considering the inher...
2014, 36(11): 2691-2697.
doi: 10.3724/SP.J.1146.2013.01910
Abstract:
This paper analyzes the production mechanism of the multipath Spread Doppler Clutter (SDC) in skywave Over The Horizon Radar (OTHR). Because the amplitude and phase errors always exist in the array and the power of desired signal (sea clutter) is gre...
This paper analyzes the production mechanism of the multipath Spread Doppler Clutter (SDC) in skywave Over The Horizon Radar (OTHR). Because the amplitude and phase errors always exist in the array and the power of desired signal (sea clutter) is gre...
2014, 36(11): 2698-2704.
doi: 10.3724/SP.J.1146.2013.01900
Abstract:
The maximum number of targets that can be uniquely identified by the traditional MIMO radar is limited by the number of virtual sensors. To alleviate this issue, a novel antenna array in MIMO radar which is based on the concept of nested arrays is de...
The maximum number of targets that can be uniquely identified by the traditional MIMO radar is limited by the number of virtual sensors. To alleviate this issue, a novel antenna array in MIMO radar which is based on the concept of nested arrays is de...
2014, 36(11): 2705-2710.
doi: 10.3724/SP.J.1146.2013.02004
Abstract:
The Short-Time Fourier Transform (STFT) is an important method widely used in the study of the nonstationary signals. After discussing the filtering and the estimation of chirp rate for Linear Frequency Modulation (LFM) signal by using the STFT, this...
The Short-Time Fourier Transform (STFT) is an important method widely used in the study of the nonstationary signals. After discussing the filtering and the estimation of chirp rate for Linear Frequency Modulation (LFM) signal by using the STFT, this...
2014, 36(11): 2711-2716.
doi: 10.3724/SP.J.1146.2013.02002
Abstract:
Digital Beam Forming (DBF) in elevation is regarded as an important candidate for high resolution and wide coverage imaging SAR system, since it can enhance the performance of SAR system by forming a high gain and sharp beam pattern to receive the pu...
Digital Beam Forming (DBF) in elevation is regarded as an important candidate for high resolution and wide coverage imaging SAR system, since it can enhance the performance of SAR system by forming a high gain and sharp beam pattern to receive the pu...
2014, 36(11): 2717-2722.
doi: 10.3724/SP.J.1146.2013.01979
Abstract:
Inversion and interpretation of underground structure are ultimate aim of Ground Penetrating Radar (GPR) working. Most of inversion problems are non-linear, hence, investigations of non-linear inversion methods are significant. In this paper, an impr...
Inversion and interpretation of underground structure are ultimate aim of Ground Penetrating Radar (GPR) working. Most of inversion problems are non-linear, hence, investigations of non-linear inversion methods are significant. In this paper, an impr...
2014, 36(11): 2723-2729.
doi: 10.3724/SP.J.1146.2013.01840
Abstract:
To reflect different intensities of noises among the different bands in the transform domain and the intrinsic structures of the transformed data, a new approach for denoising the hyperspectral images is proposed based on Principal Component Analysis...
To reflect different intensities of noises among the different bands in the transform domain and the intrinsic structures of the transformed data, a new approach for denoising the hyperspectral images is proposed based on Principal Component Analysis...
2014, 36(11): 2730-2736.
doi: 10.3724/SP.J.1146.2013.01751
Abstract:
This paper presents a new algorithm for image segmentation, which combines Hidden Markov Random Field (HMRF) and Gaussian Regression Model (GRM) to Fuzzy C-Means (FCM) clustering. The proposed algorithm uses the KL (Kullback-Leibler) information to r...
This paper presents a new algorithm for image segmentation, which combines Hidden Markov Random Field (HMRF) and Gaussian Regression Model (GRM) to Fuzzy C-Means (FCM) clustering. The proposed algorithm uses the KL (Kullback-Leibler) information to r...
2014, 36(11): 2737-2743.
doi: 10.3724/SP.J.1146.2013.01511
Abstract:
A simple and effective reconstruction scheme of hyperspectral data with spectral Compressive Sensing (CS) is proposed based on the widely used linear mixing model. The scheme is different from the traditional reconstruction methods of compressive sen...
A simple and effective reconstruction scheme of hyperspectral data with spectral Compressive Sensing (CS) is proposed based on the widely used linear mixing model. The scheme is different from the traditional reconstruction methods of compressive sen...
2014, 36(11): 2744-2749.
doi: 10.3724/SP.J.1146.2013.01838
Abstract:
A robust security communication protocol for wireless network based on quantum teleportation is proposed in this paper by further study about wireless security protocol 802.11i, and quantum entanglement of nonlocality is used to enhance the security ...
A robust security communication protocol for wireless network based on quantum teleportation is proposed in this paper by further study about wireless security protocol 802.11i, and quantum entanglement of nonlocality is used to enhance the security ...
2014, 36(11): 2750-2755.
doi: 10.3724/SP.J.1146.2013.00546
Abstract:
Most of the existing works on the cross-layer design of dynamic resource allocation in wireless multi-hop networks assume that every node can avail perfect Channel State Information (CSI) of other nodes in the networks. However, because of the channe...
Most of the existing works on the cross-layer design of dynamic resource allocation in wireless multi-hop networks assume that every node can avail perfect Channel State Information (CSI) of other nodes in the networks. However, because of the channe...
2014, 36(11): 2756-2761.
doi: 10.3724/SP.J.1146.2013.02019
Abstract:
It has a positive effect on the research of brain function to introduce the concept of network into neuroscience. However, in the real application the brain network with complex characteristics makes it hard to understand. In this paper, based on the...
It has a positive effect on the research of brain function to introduce the concept of network into neuroscience. However, in the real application the brain network with complex characteristics makes it hard to understand. In this paper, based on the...
2014, 36(11): 2762-2767.
doi: 10.3724/SP.J.1146.2013.01975
Abstract:
Spectrum sensing is a key technology to enable dynamic spectrum access in Cognitive Radio (CR). To ensure that primary users are properly protected while maximizing the performance of secondary users, most related work considers the metrics of probab...
Spectrum sensing is a key technology to enable dynamic spectrum access in Cognitive Radio (CR). To ensure that primary users are properly protected while maximizing the performance of secondary users, most related work considers the metrics of probab...
2014, 36(11): 2768-2774.
doi: 10.3724/SP.J.1146.2013.01879
Abstract:
Thread-Level Speculation (TLS) is a thread-level automatic parallelization technique to accelerate sequential programs on multi-core. Loops are usually regular structures and programs spent significant amounts of time executing them, thus loops are i...
Thread-Level Speculation (TLS) is a thread-level automatic parallelization technique to accelerate sequential programs on multi-core. Loops are usually regular structures and programs spent significant amounts of time executing them, thus loops are i...
2014, 36(11): 2775-2780.
doi: 10.3724/SP.J.1146.2013.01987
Abstract:
According to the physical mechanism and the equivalent circuit model of the planar Electromagnetic Band-Gap (EBG) structure, a novel planar EBG structure named CBS-EBG for Simultaneous Switching Noise (SSN) suppression in high-speed circuits is propo...
According to the physical mechanism and the equivalent circuit model of the planar Electromagnetic Band-Gap (EBG) structure, a novel planar EBG structure named CBS-EBG for Simultaneous Switching Noise (SSN) suppression in high-speed circuits is propo...
2014, 36(11): 2781-2785.
doi: 10.3724/SP.J.1146.2013.02032
Abstract:
In this paper, a novel metric is proposed to evaluate the 3-D mesh quality via analyzing curvature, since the curvature describes well the visual characteristics of a 3-D mesh. Firstly, the curvature at each vertex is estimated, then a curvature matr...
In this paper, a novel metric is proposed to evaluate the 3-D mesh quality via analyzing curvature, since the curvature describes well the visual characteristics of a 3-D mesh. Firstly, the curvature at each vertex is estimated, then a curvature matr...
2014, 36(11): 2786-2790.
doi: 10.3724/SP.J.1146.2014.00176
Abstract:
Ordered Binary Decision Diagram (OBDD) is commonly used in network reliability calculation. When evaluating the network reliability based on OBDD, computation time mainly depends on the size of the operating OBDD, which mostly relies on the variable ...
Ordered Binary Decision Diagram (OBDD) is commonly used in network reliability calculation. When evaluating the network reliability based on OBDD, computation time mainly depends on the size of the operating OBDD, which mostly relies on the variable ...
2014, 36(11): 2791-2794.
doi: 10.3724/SP.J.1146.2013.01665
Abstract:
In this paper, a novel miniaturized Substrate Integrated Waveguide (SIW) dual-mode filter is presented. By adopting an orthogonal input and output feed line, and an inclined slot line for disturbing two degenerate modes, two Transmission Zeros (TZs) ...
In this paper, a novel miniaturized Substrate Integrated Waveguide (SIW) dual-mode filter is presented. By adopting an orthogonal input and output feed line, and an inclined slot line for disturbing two degenerate modes, two Transmission Zeros (TZs) ...
