Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.567312
J. Yang, P. Karjalainen, J. Kuikka, L. Patomaki
A scatter correction using a two-dimensional (2D) deconvolution method has been developed which compensates for Compton scattering in a triple-head gamma camera images. It assumes that the scatter distribution in any projection can be estimated from sinogram activity distribution using a position-invariant scatter kernel. The scatter distribution function has been derived from the measurements of a point source in a plastic phantom. The scatter correction technique is based on filtering by 2D convolution in the spatial domain. The spatial filter was designed to implement a 2D IIR filter. The quality of the compensation is also evaluated by comparing the ratio of the average counts/pixel with and without scatter correction in clinical brain blood flow studies.
{"title":"A scatter correction based on the deconvolution method in SPECT","authors":"J. Yang, P. Karjalainen, J. Kuikka, L. Patomaki","doi":"10.1109/ICSIGP.1996.567312","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.567312","url":null,"abstract":"A scatter correction using a two-dimensional (2D) deconvolution method has been developed which compensates for Compton scattering in a triple-head gamma camera images. It assumes that the scatter distribution in any projection can be estimated from sinogram activity distribution using a position-invariant scatter kernel. The scatter distribution function has been derived from the measurements of a point source in a plastic phantom. The scatter correction technique is based on filtering by 2D convolution in the spatial domain. The spatial filter was designed to implement a 2D IIR filter. The quality of the compensation is also evaluated by comparing the ratio of the average counts/pixel with and without scatter correction in clinical brain blood flow studies.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128119079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.567387
V. Kutuzov
A new approach of irregular multifrequency signal processing for short wave (SW) and ultra SW radar is discussed. These signals have advanced noise stability to noise background due to the flexible energy distribution in the spectral range. They have improved electromagnetic compatibility in comparison with other electronic systems. A number of parametric algorithms were synthesized for irregular multifrequency signal processing. They are based on the autoregressive model. The results of the signal-algorithm approbation are discussed. This approbation was completed with the help of an experimental SW radar used for sea surface monitoring.
{"title":"Synthesis of non-regular multitone signals and algorithms of their processing","authors":"V. Kutuzov","doi":"10.1109/ICSIGP.1996.567387","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.567387","url":null,"abstract":"A new approach of irregular multifrequency signal processing for short wave (SW) and ultra SW radar is discussed. These signals have advanced noise stability to noise background due to the flexible energy distribution in the spectral range. They have improved electromagnetic compatibility in comparison with other electronic systems. A number of parametric algorithms were synthesized for irregular multifrequency signal processing. They are based on the autoregressive model. The results of the signal-algorithm approbation are discussed. This approbation was completed with the help of an experimental SW radar used for sea surface monitoring.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128191553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.566276
Sun Yun-lian, Shi Gang, Chen Yunping
Direction coding is a new method of image coding. The human visual model is used to make direction filters and high compression ratios are obtained. Direction coding not only deals with the continuous component of an image by subsampling it with high compression ratio, but also does some things with the discontinuous component of the image. We apply the direction coding method to narrowband image transmission in a progressive way. Experiments were made on normal telephone lines.
{"title":"Study of the coding in the progressive image transmission","authors":"Sun Yun-lian, Shi Gang, Chen Yunping","doi":"10.1109/ICSIGP.1996.566276","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.566276","url":null,"abstract":"Direction coding is a new method of image coding. The human visual model is used to make direction filters and high compression ratios are obtained. Direction coding not only deals with the continuous component of an image by subsampling it with high compression ratio, but also does some things with the discontinuous component of the image. We apply the direction coding method to narrowband image transmission in a progressive way. Experiments were made on normal telephone lines.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130264753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.566252
T. Lin
Image compression is a process of efficiently coding digital images to reduce the number of bits required in representing an image. We propose an effective lossless image compression by eliminating the spatial redundancy and temporal redundancy. The spatial redundancy is grouped with the quadtree structure, and the temporal redundancy is eliminated by our tree coding. The quadtree of the image is constructed while an image is given. Then the breadth first search is applied to encode the quadtree. In our coding scheme, it is only necessary to store the internal nodes. The code of an internal node depends on the type of node of its children. Seven bits are used to represent an internal node. Therefore the number of bits needed to store an image is proportional to the number of internal nodes in the corresponding quadtree.
{"title":"Image compression using fixed length quadtree coding","authors":"T. Lin","doi":"10.1109/ICSIGP.1996.566252","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.566252","url":null,"abstract":"Image compression is a process of efficiently coding digital images to reduce the number of bits required in representing an image. We propose an effective lossless image compression by eliminating the spatial redundancy and temporal redundancy. The spatial redundancy is grouped with the quadtree structure, and the temporal redundancy is eliminated by our tree coding. The quadtree of the image is constructed while an image is given. Then the breadth first search is applied to encode the quadtree. In our coding scheme, it is only necessary to store the internal nodes. The code of an internal node depends on the type of node of its children. Seven bits are used to represent an internal node. Therefore the number of bits needed to store an image is proportional to the number of internal nodes in the corresponding quadtree.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134329285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.566243
K. Serhane, J. Devars
A comparative study between different techniques for object detection on a structured background is considered. A summary of existing works is presented and the concept of a structured background is introduced with an original concept of object detection. We describe the proposed methods and then a comparison was done to choose the method which performed best according to some commonly used criterion in object detection such as processing time, false alarms, missed detection, and the average distance between the theoretic zone and detected zone. The proposed methods have been tested on a variety of synthetic images and yielded promising results.
{"title":"A comparative study between different new techniques for object detection on a structured background","authors":"K. Serhane, J. Devars","doi":"10.1109/ICSIGP.1996.566243","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.566243","url":null,"abstract":"A comparative study between different techniques for object detection on a structured background is considered. A summary of existing works is presented and the concept of a structured background is introduced with an original concept of object detection. We describe the proposed methods and then a comparison was done to choose the method which performed best according to some commonly used criterion in object detection such as processing time, false alarms, missed detection, and the average distance between the theoretic zone and detected zone. The proposed methods have been tested on a variety of synthetic images and yielded promising results.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134343672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.566982
Z. Zang, A. Cantoni, K. L. Teo
Envelope-constrained filtering problem is concerned with the design of a time-invariant filter to process a given input signal such that the output of the filter is guaranteed to be within a prespecified output mask. Using discrete-time Laguerre functions and /spl Hscr//sub /spl infin// optimization techniques, the envelope-constrained IIR filter design problem has been reformulated and solved as an /spl Hscr//sub /spl infin// model matching problem. To illustrate the usefulness of the design method, a numerical example is presented which is concerned with the design of an equalization filter for a digital transmission channel.
{"title":"Envelope-constrained IIR filter design via Laguerre functions and /spl Hscr//sub /spl infin// optimization methods","authors":"Z. Zang, A. Cantoni, K. L. Teo","doi":"10.1109/ICSIGP.1996.566982","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.566982","url":null,"abstract":"Envelope-constrained filtering problem is concerned with the design of a time-invariant filter to process a given input signal such that the output of the filter is guaranteed to be within a prespecified output mask. Using discrete-time Laguerre functions and /spl Hscr//sub /spl infin// optimization techniques, the envelope-constrained IIR filter design problem has been reformulated and solved as an /spl Hscr//sub /spl infin// model matching problem. To illustrate the usefulness of the design method, a numerical example is presented which is concerned with the design of an equalization filter for a digital transmission channel.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131565586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.566591
Huiwei Guan, Chi-Kwong Li, T. Cheung, Songnian Yu, W. Tong
This paper discusses the design of a hybrid artificial neural network (ANN) system and its implementation in the Parallel Virtual Machine (PVM) environment. First, the PVM functions for supporting parallel applications and communications among multiple processes and multiple machines are investigated. Then, the design and construction of a hybrid ANN simulation software is proposed. It includes the user interface, control and SPMD computing levels. The software can be used for supporting parallel simulation of different kinds of learning algorithms and neural computing models.
{"title":"Design and implementation of a parallel software for hybrid neural network computation in PVM environment","authors":"Huiwei Guan, Chi-Kwong Li, T. Cheung, Songnian Yu, W. Tong","doi":"10.1109/ICSIGP.1996.566591","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.566591","url":null,"abstract":"This paper discusses the design of a hybrid artificial neural network (ANN) system and its implementation in the Parallel Virtual Machine (PVM) environment. First, the PVM functions for supporting parallel applications and communications among multiple processes and multiple machines are investigated. Then, the design and construction of a hybrid ANN simulation software is proposed. It includes the user interface, control and SPMD computing levels. The software can be used for supporting parallel simulation of different kinds of learning algorithms and neural computing models.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131608851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.571266
L. Dai-zhi, R. Star, Wei Yinkang, Zhao Ke, Su Juan, Jiang Weimin
Based on the processing and analysis of seismic signals originating from underground nuclear explosions and natural earthquakes, it is illustrated that the seismic signals in the time domain possess the characteristics of statistical self-affine fractals, whilst the fractal dimension D yielded from logarithmic power spectrum does not serve as an effective feature for seismic pattern recognition. Moreover, it is found that the signal "energy" at each scale of the wavelet decomposition relates closely to the scale, and that an apex appeared on the "energy spectrum" of the detail signal, hence, the two kinds of features advocated are very likely to be utilized in seismic pattern recognition applications. The provided recognition results show the improvement and performance achieved by the proposed feature extraction and selection methods.
{"title":"Fractal analysis with applications to seismic pattern recognition of nuclear explosion","authors":"L. Dai-zhi, R. Star, Wei Yinkang, Zhao Ke, Su Juan, Jiang Weimin","doi":"10.1109/ICSIGP.1996.571266","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.571266","url":null,"abstract":"Based on the processing and analysis of seismic signals originating from underground nuclear explosions and natural earthquakes, it is illustrated that the seismic signals in the time domain possess the characteristics of statistical self-affine fractals, whilst the fractal dimension D yielded from logarithmic power spectrum does not serve as an effective feature for seismic pattern recognition. Moreover, it is found that the signal \"energy\" at each scale of the wavelet decomposition relates closely to the scale, and that an apex appeared on the \"energy spectrum\" of the detail signal, hence, the two kinds of features advocated are very likely to be utilized in seismic pattern recognition applications. The provided recognition results show the improvement and performance achieved by the proposed feature extraction and selection methods.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131621495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.571192
Wen-Yun Huang, Zhen-Zhong Wang
The combination mode of a main computer and slave computer is adopted by the IBMTMSTD01 signal processor. The main computer is a microcomputer mode IBM-PC/AT which can be used in after-processing of data, while the TMS 320c25 is used by the slave computer as a controller, and data acquisition consisting of sensors, converters, interfaces and peripheral equipment, carries out logging, display and printing of parameters for strain, pressure, displacements, temperatures, etc. (that is preprocessing of data). Data transmission between main computer and slave computer can be realized by the serial mode via the interface RS-232C. The system function, structure of hardware and software design are introduced by taking strain logging & processing as an example.
{"title":"Application of the signal processor in data processing","authors":"Wen-Yun Huang, Zhen-Zhong Wang","doi":"10.1109/ICSIGP.1996.571192","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.571192","url":null,"abstract":"The combination mode of a main computer and slave computer is adopted by the IBMTMSTD01 signal processor. The main computer is a microcomputer mode IBM-PC/AT which can be used in after-processing of data, while the TMS 320c25 is used by the slave computer as a controller, and data acquisition consisting of sensors, converters, interfaces and peripheral equipment, carries out logging, display and printing of parameters for strain, pressure, displacements, temperatures, etc. (that is preprocessing of data). Data transmission between main computer and slave computer can be realized by the serial mode via the interface RS-232C. The system function, structure of hardware and software design are introduced by taking strain logging & processing as an example.","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132800798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-10-14DOI: 10.1109/ICSIGP.1996.567110
F. Álvarez-Vaquero, J. Sanz-González
In this paper, we analyze a detector based on the optimum permutation test, applied to nonparametric radar detection which provides good performance without a large computational effort. We compare it with the parametric test in the Neyman-Pearson sense. We also show the characteristic of detectability of the optimum permutation test versus parametric one under Gaussian noise environments and different types of target models (nonfluctuating, Swerling I and Swerling II). The detection probability versus signal-to-noise ratio is calculated by Monte-Carlo simulations for different parameter values (pulse number N, reference samples M and false alarm probability P/sub fa/).
{"title":"Nonparametric permutation test versus optimum parametric test for radar detection","authors":"F. Álvarez-Vaquero, J. Sanz-González","doi":"10.1109/ICSIGP.1996.567110","DOIUrl":"https://doi.org/10.1109/ICSIGP.1996.567110","url":null,"abstract":"In this paper, we analyze a detector based on the optimum permutation test, applied to nonparametric radar detection which provides good performance without a large computational effort. We compare it with the parametric test in the Neyman-Pearson sense. We also show the characteristic of detectability of the optimum permutation test versus parametric one under Gaussian noise environments and different types of target models (nonfluctuating, Swerling I and Swerling II). The detection probability versus signal-to-noise ratio is calculated by Monte-Carlo simulations for different parameter values (pulse number N, reference samples M and false alarm probability P/sub fa/).","PeriodicalId":385432,"journal":{"name":"Proceedings of Third International Conference on Signal Processing (ICSP'96)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133003675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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