A new image coding method based on image region is proposed in this paper. According to the features of the image gray surface, an image is partitioned into many convex polygons which appoximate the original image as ...
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ISBN:
(纸本)7505338900
A new image coding method based on image region is proposed in this paper. According to the features of the image gray surface, an image is partitioned into many convex polygons which appoximate the original image as close as possible. The experimental results show that good quality of the reconstructed image can still be obtained when the data compression ratio is more than 20:1 and SNR is more than 30dB.
Blind equalization and blind deconvolution have been an important interesting topic in diverse fields including data communication, image processing and geophysical dataprocessing. Recently, Inouye and Babe proposed ...
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ISBN:
(纸本)7505338900
Blind equalization and blind deconvolution have been an important interesting topic in diverse fields including data communication, image processing and geophysical dataprocessing. Recently, Inouye and Babe proposed a multistage maximization criterion and a single-stage maximization criterion for attaining the blind equalization of multichannel linear time-invariant systems. However, their maximization criteria should be subjected to several constraints of equations. In this paper, we present unconstrained new maximization criteria for accomplishing the blind equalization of multichannel linear time-invariant systems. Stochastic gradient algorithms are proposed for solving the unconstrained maximization problems. Simulation examples are included to examine the performance of the proposed algorithms.
Dynamic imaging with positron emission tomography (PET) has a great impact on the quantification of physiological parameters in human. However, physiological parameters of interest are usually estimated with measureme...
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ISBN:
(纸本)7505338900
Dynamic imaging with positron emission tomography (PET) has a great impact on the quantification of physiological parameters in human. However, physiological parameters of interest are usually estimated with measurements obtained from a huge amount of dynamic image data. In this paper, a new estimation method is proposed which is suitable for parameter estimation using reduced dynamic imaging data in PET studies. The method was tested with the use of a well-known tracer kinetic model, and computer simulations were performed. It has been found that good parameter estimates can be obtained using: the method with reduced dynamic imaging data.
Assuring the correct temporal presentation of multimedia objects is called multimedia synchronization. How to specify the temporal relations in multimedia objects is one of the main issues in the research of multimedi...
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ISBN:
(纸本)7505338900
Assuring the correct temporal presentation of multimedia objects is called multimedia synchronization. How to specify the temporal relations in multimedia objects is one of the main issues in the research of multimedia synchronization. This paper examines how many and which temporal relations in multimedia systems. On the basis of it, we propose an interval-based generalized synchronization model, which can be used to specify all temporal relations in multimedia systems.
Multiple chip rates can be applied to a DS/CDMA system in order to enhance potential system capacity which otherwise is limited by spreading code family size. The technique is called by us ''chip rate division...
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ISBN:
(纸本)7505338900
Multiple chip rates can be applied to a DS/CDMA system in order to enhance potential system capacity which otherwise is limited by spreading code family size. The technique is called by us ''chip rate division multiple access'' (CrdMA). A co-channel interference method based on cross-correlation statistics is used to Study performance of the CrdMA with various spreading code families.
Direction coding is the new method of image coding. The human visual model is used to make direction filters and high compressive ratios are obtained. Direction coding not only deals with the continuous component of a...
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ISBN:
(纸本)7505338900
Direction coding is the new method of image coding. The human visual model is used to make direction filters and high compressive ratios are obtained. Direction coding not only deals with the continuous component of an image by subsample it with high compressive ratio, but also does some things with the discontinuous component of the image. We apply direction coding method to narrow band image transmission in a progressive way. Experiments were made on normal telephone lines.
Multispectral image fusion is a kind of process of synthesis and processing for multispectral image data. On the basis of optoelectronic imaging technique, the imaging process & feature of low light level(LLL) TV ...
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ISBN:
(纸本)7505338900
Multispectral image fusion is a kind of process of synthesis and processing for multispectral image data. On the basis of optoelectronic imaging technique, the imaging process & feature of low light level(LLL) TV system are analyzed & the principle and processing construction of multispectral LLL TV image fusion are discussed. The proper combination of low light level camera and optical filters is used to implement multispectral image fusion experiment at night for outdoor static scene by the aid of computer. The results of experiment indicate that multispectral low light level image fusion has improved the capability for recognizing targets.
Supposing that there are two dissimilar sensor(e.g. radar and infrared detector ),a Multi-Sensor data Sequential Fusion Filter(MSDSFF ) has been proposed. For maneuvering target tracking,Interactive Acceleration Compe...
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ISBN:
(纸本)7505338900
Supposing that there are two dissimilar sensor(e.g. radar and infrared detector ),a Multi-Sensor data Sequential Fusion Filter(MSDSFF ) has been proposed. For maneuvering target tracking,Interactive Acceleration Compensation(IAC ) algorithm has been introduced into the MSDSFF(IAC/MSDSFF ).Considered the performance and the computational requirement, IAC/MSDSFF is an effective approach
The system identification is very useful for testing the inherent characteristics of radar systems and their subsystems. This paper discusses the application of signalprocessing to the identification and diagnosis of...
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The system identification is very useful for testing the inherent characteristics of radar systems and their subsystems. This paper discusses the application of signalprocessing to the identification and diagnosis of radar system. By using m sequence and correlation processing for the measured data with the established file, we can realize fault diagnosis.
This paper introduces an optimal realization method of multi-channel data acquisition and DSP processing. The key features of the data acquisition are adopting proper architecture and DSP-specific AD converter AD7878;...
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This paper introduces an optimal realization method of multi-channel data acquisition and DSP processing. The key features of the data acquisition are adopting proper architecture and DSP-specific AD converter AD7878;the key feature of the DSP processing is to use the fastest DSP chip TMS320C50. A real system realized by this method and its performance test are introduced in the end of the paper.
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