Email alert
2003 Vol. 25, No. 3
Display Method:
2003, 25(3): 289-294.
Abstract:
How to select the hidden area for watermarking is an important issue in the design of watermarking algorithm. In this paper an adaptive DCT watermarking algorithm is proposed, in which the hidden area is selected according to human visual system mode...
How to select the hidden area for watermarking is an important issue in the design of watermarking algorithm. In this paper an adaptive DCT watermarking algorithm is proposed, in which the hidden area is selected according to human visual system mode...
2003, 25(3): 295-299.
Abstract:
In this paper, a new algorithm of image watermark embedding and detecting based on DCT transform is presented. This method is robust to common signal and geometric distortions such as image cropping, and the embedded watermark can be detected without...
In this paper, a new algorithm of image watermark embedding and detecting based on DCT transform is presented. This method is robust to common signal and geometric distortions such as image cropping, and the embedded watermark can be detected without...
2003, 25(3): 300-305.
Abstract:
An algorithm that can synthesize multi-pose face images from a single view or small samples is proposed in this paper. First, the human face is represented with a dominant point set. Then, the variance of the dominant point set between different pose...
An algorithm that can synthesize multi-pose face images from a single view or small samples is proposed in this paper. First, the human face is represented with a dominant point set. Then, the variance of the dominant point set between different pose...
2003, 25(3): 306-312.
Abstract:
By combining the model-based analysis method for dynamic systems with multi-scale signal transformation method based on statistical characteristics, this paper proposed a group of multiscale dynamic models and multiscale error models based on the dyn...
By combining the model-based analysis method for dynamic systems with multi-scale signal transformation method based on statistical characteristics, this paper proposed a group of multiscale dynamic models and multiscale error models based on the dyn...
2003, 25(3): 313-319.
Abstract:
A Tree-structured Growing Self-Organizing Maps (TGSOM) is presented as an extended version of the Self-Organizing Feature Maps (SOFM), which has significant advantages for data mining applications. The TGSOM algorithm is presented in detail and the e...
A Tree-structured Growing Self-Organizing Maps (TGSOM) is presented as an extended version of the Self-Organizing Feature Maps (SOFM), which has significant advantages for data mining applications. The TGSOM algorithm is presented in detail and the e...
2003, 25(3): 320-325.
Abstract:
A new invariants classification feature based on cyclic temporary cumulant is proposed for classification of MPSK signals. The new feature only uses the symbol rate information, which is resistant to shaping pulse and invariant with respect to the ti...
A new invariants classification feature based on cyclic temporary cumulant is proposed for classification of MPSK signals. The new feature only uses the symbol rate information, which is resistant to shaping pulse and invariant with respect to the ti...
2003, 25(3): 326-332.
Abstract:
Based on overlapping individual filter character, IIR general parameter filters are used as units of filterbank, whose amplitude and delay characters are all considered. In designing, let filter frequency character in passband region meet the demand,...
Based on overlapping individual filter character, IIR general parameter filters are used as units of filterbank, whose amplitude and delay characters are all considered. In designing, let filter frequency character in passband region meet the demand,...
2003, 25(3): 333-339.
Abstract:
The higher-order statistics has found applications in the wide area of signal processing problem. However in some practical applications, only a sample of the objective process can be obtained. Thus the statistical average must be replaced by time av...
The higher-order statistics has found applications in the wide area of signal processing problem. However in some practical applications, only a sample of the objective process can be obtained. Thus the statistical average must be replaced by time av...
2003, 25(3): 340-344.
Abstract:
ESPRIT can estimate one direction of signals utilizing a single shift-invariance property of the sensor array. A novel method, i.e. dual-invariance ESPRIT, is proposed in the paper which can estimate two directions of incident signals utilizing two s...
ESPRIT can estimate one direction of signals utilizing a single shift-invariance property of the sensor array. A novel method, i.e. dual-invariance ESPRIT, is proposed in the paper which can estimate two directions of incident signals utilizing two s...
2003, 25(3): 345-352.
Abstract:
In order to meet the applications of wireless communication, a new speech algorithm based on sub-frame joint coding is proposed in this paper. This new algorithm improves several aspects such as model structure, LSP quantization and coding. This algo...
In order to meet the applications of wireless communication, a new speech algorithm based on sub-frame joint coding is proposed in this paper. This new algorithm improves several aspects such as model structure, LSP quantization and coding. This algo...
2003, 25(3): 353-358.
Abstract:
In this paper, first, the frequency scatter model of radar target two-dimension electromagnetic scattering is studied, then, the idea of ISAR by parameter estimation method is presented and the MP2D method is researched, finally, the experimental res...
In this paper, first, the frequency scatter model of radar target two-dimension electromagnetic scattering is studied, then, the idea of ISAR by parameter estimation method is presented and the MP2D method is researched, finally, the experimental res...
2003, 25(3): 359-363.
Abstract:
Modern measurement radars have to estimate the direction of the targets accurately in real time because they usually have to track the targets in real time. A novel real-time angle estimation method, which utilizes the theory of high-resolution DOA e...
Modern measurement radars have to estimate the direction of the targets accurately in real time because they usually have to track the targets in real time. A novel real-time angle estimation method, which utilizes the theory of high-resolution DOA e...
2003, 25(3): 364-369.
Abstract:
This paper proposes a switched-beam smart antennas scheme which is based on the simultaneous searching of beams and channels, and analyzes the SIR performance of uplink in system when applying the scheme. The proposed scheme has better performance co...
This paper proposes a switched-beam smart antennas scheme which is based on the simultaneous searching of beams and channels, and analyzes the SIR performance of uplink in system when applying the scheme. The proposed scheme has better performance co...
2003, 25(3): 370-376.
Abstract:
Based on the concept of contention reservation access and polling transmission, User-dependent Perfect-scheduling Multiple Access (UPMA) protocol for supporting node mobility, multihop architecture and quality-of-service (QoS) of multimedia traffic i...
Based on the concept of contention reservation access and polling transmission, User-dependent Perfect-scheduling Multiple Access (UPMA) protocol for supporting node mobility, multihop architecture and quality-of-service (QoS) of multimedia traffic i...
2003, 25(3): 377-382.
Abstract:
Bluetooth is a new technology for short range wireless communication.This paper describes the characteristics of the piconet and scatternet of Bluetooth,and analyzes the basic principle of designing routing method for Bluetooth. This paper puts forwa...
Bluetooth is a new technology for short range wireless communication.This paper describes the characteristics of the piconet and scatternet of Bluetooth,and analyzes the basic principle of designing routing method for Bluetooth. This paper puts forwa...
2003, 25(3): 383-388.
Abstract:
When numerical methods are used to solve the inhomogeneous media problems, generally, the large coefficient matrixes are generated. This results in the shortage of memory or very long computing time. In this paper, the domain decomposition method is ...
When numerical methods are used to solve the inhomogeneous media problems, generally, the large coefficient matrixes are generated. This results in the shortage of memory or very long computing time. In this paper, the domain decomposition method is ...
2003, 25(3): 389-394.
Abstract:
The radiation response and electric characteristics of 6H-SiC MOS structure are studied with experiment. It is found that the main electronic conduction mechanism in the high field regions of the I-V characteristics is identified to be Fowler-Nordhei...
The radiation response and electric characteristics of 6H-SiC MOS structure are studied with experiment. It is found that the main electronic conduction mechanism in the high field regions of the I-V characteristics is identified to be Fowler-Nordhei...
2003, 25(3): 412-418.
Abstract:
This paper presents a method for identity verification based on matching of hand shapes. The method first represents the shapes of hands by sets of ordered points. Next, the two sets of points are matched using point matching algorithm based on deter...
This paper presents a method for identity verification based on matching of hand shapes. The method first represents the shapes of hands by sets of ordered points. Next, the two sets of points are matched using point matching algorithm based on deter...
2003, 25(3): 419-423.
Abstract:
Content-based image retrieval is a key technique in multimedia, network communication and computer applications, etc. In this paper, a content-based image retrieval method is proposed, which can be executed in fractal domain and does not need to do f...
Content-based image retrieval is a key technique in multimedia, network communication and computer applications, etc. In this paper, a content-based image retrieval method is proposed, which can be executed in fractal domain and does not need to do f...
2003, 25(3): 424-426.
Abstract:
In recent years, the reduction of Radar Cross Section (R,CS) for antenna has been an important topic in the field of electronic warfare. The way to reduce the RCS of bi-reflective antennas, which have been widely used, in the axial direction is discu...
In recent years, the reduction of Radar Cross Section (R,CS) for antenna has been an important topic in the field of electronic warfare. The way to reduce the RCS of bi-reflective antennas, which have been widely used, in the axial direction is discu...
2003, 25(3): 427-432.
Abstract:
Based on electromagnetic theory, the analytical and numerical results of radial energy of linear element planar antenna array excited by electromagnetic pulse are offered at first, then, by analyzing the results with the interference and the diffract...
Based on electromagnetic theory, the analytical and numerical results of radial energy of linear element planar antenna array excited by electromagnetic pulse are offered at first, then, by analyzing the results with the interference and the diffract...
2003, 25(3): 395-403.
Abstract:
Abstract Image segmentation using deformable models encompasses a class of techniques developed in recent years and has been studied extensively. The techniques offer a novel method for effectively extracting the border of an irregular object in imag...
Abstract Image segmentation using deformable models encompasses a class of techniques developed in recent years and has been studied extensively. The techniques offer a novel method for effectively extracting the border of an irregular object in imag...
2003, 25(3): 404-411.
Abstract:
This paper summaries the recent research advance in the field providing congestion control mechanisms as powerful and flexible as the ones implemented by a stateful network. In a partial stateful or stateless network, three kinds of mechanisms are in...
This paper summaries the recent research advance in the field providing congestion control mechanisms as powerful and flexible as the ones implemented by a stateful network. In a partial stateful or stateless network, three kinds of mechanisms are in...
