Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710227
T. Childs, V. Sokolov, C. Sullivan
Using molecular beam epitaxy (MBE) and lattice engineering techniques, the feasibility of combining photonic devices applicable to the 1.3 to 1.55 /spl mu/m wavelength range and monolithic microwave (or mm-wave) integrated circuits (MMICs) on GaAs is demonstrated. A key factor in the MBE growth is incorporation of an InGaAs active layer having an indium arsenide mole fraction of 0.35 or greater and its lattic compatibility with the underlying semi-insulating GaAs substrate. The InGaAs layer used for the photonic devices can also serve as the active channel for the pseudomorphic high-electron-mobility transistors (PHEMTs) for application in MMICs. The material structure includes a 3-layer AlGaAs/GaAs/AlGaAs optical waveguide and a thin InGaAs absorbing layer situated directly above the optical waveguide. Metal-semiconductor-metal (MSM) photodetectors are formed on the top surface of the InGaAs layer for collection of the photo-induced carriers. Initial measurements are presented.
{"title":"Low cost lattice-engineered 1.3-155 um wavelength waveguide/detector/MMIC OEICs for broadband communication systems","authors":"T. Childs, V. Sokolov, C. Sullivan","doi":"10.1109/NAECON.1998.710227","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710227","url":null,"abstract":"Using molecular beam epitaxy (MBE) and lattice engineering techniques, the feasibility of combining photonic devices applicable to the 1.3 to 1.55 /spl mu/m wavelength range and monolithic microwave (or mm-wave) integrated circuits (MMICs) on GaAs is demonstrated. A key factor in the MBE growth is incorporation of an InGaAs active layer having an indium arsenide mole fraction of 0.35 or greater and its lattic compatibility with the underlying semi-insulating GaAs substrate. The InGaAs layer used for the photonic devices can also serve as the active channel for the pseudomorphic high-electron-mobility transistors (PHEMTs) for application in MMICs. The material structure includes a 3-layer AlGaAs/GaAs/AlGaAs optical waveguide and a thin InGaAs absorbing layer situated directly above the optical waveguide. Metal-semiconductor-metal (MSM) photodetectors are formed on the top surface of the InGaAs layer for collection of the photo-induced carriers. Initial measurements are presented.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115473772","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710175
Yin Chengyou, Xu Shanjia, Wang Dongjin
In this paper, the distributed detection problem for sensors with star configuration is systematically investigated under the assumption that the fusion rule is based on Neyman-Pearson (N-P) criterion. Then it is proved that local decision and local fusion rules should also be N-P tests in order to obtain global optimization. The computational method of the thresholds is presented for the case where the constant alarm false rate processors are used in each sensor. Finally some calculation examples are given, which demonstrate that the performance of the optimal distributed detection approaches to the one of central detection under unconstrained communication bandwidth. The results given in this paper are of important significance for the point or small area multisensor defense system.
{"title":"The analysis and design of distributed detection based on star configurations","authors":"Yin Chengyou, Xu Shanjia, Wang Dongjin","doi":"10.1109/NAECON.1998.710175","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710175","url":null,"abstract":"In this paper, the distributed detection problem for sensors with star configuration is systematically investigated under the assumption that the fusion rule is based on Neyman-Pearson (N-P) criterion. Then it is proved that local decision and local fusion rules should also be N-P tests in order to obtain global optimization. The computational method of the thresholds is presented for the case where the constant alarm false rate processors are used in each sensor. Finally some calculation examples are given, which demonstrate that the performance of the optimal distributed detection approaches to the one of central detection under unconstrained communication bandwidth. The results given in this paper are of important significance for the point or small area multisensor defense system.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128482703","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710094
D.G. Kim, S.K. Hong
In this paper, our attention is focused on the compensation of the nonlinear thermal bias (zero-rate-output) drift of RRS (Resonant Rate Sensor), which originates from a number of sources, including manufacturing tolerances, material inhomogeneity and inevitable mechanical characteristic variation of the cylinder with temperature. Motivated by the capability of fuzzy logic in managing nonlinearity, the nonlinearity of bias was represented by Takagi-Sugeno (TS) fuzzy model over the entire range of operating temperature. Then, the fuzzy model was directly used for compensation of nonlinear bias drift by subtracting the estimated output from the raw data of RRS. By doing this, we can guarantee the robust (against temperature variations) sensor performance throughout entire operating temperature ranges.
{"title":"The compensation of nonlinear thermal bias drift of resonant rate sensor (RRS) using fuzzy logic","authors":"D.G. Kim, S.K. Hong","doi":"10.1109/NAECON.1998.710094","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710094","url":null,"abstract":"In this paper, our attention is focused on the compensation of the nonlinear thermal bias (zero-rate-output) drift of RRS (Resonant Rate Sensor), which originates from a number of sources, including manufacturing tolerances, material inhomogeneity and inevitable mechanical characteristic variation of the cylinder with temperature. Motivated by the capability of fuzzy logic in managing nonlinearity, the nonlinearity of bias was represented by Takagi-Sugeno (TS) fuzzy model over the entire range of operating temperature. Then, the fuzzy model was directly used for compensation of nonlinear bias drift by subtracting the estimated output from the raw data of RRS. By doing this, we can guarantee the robust (against temperature variations) sensor performance throughout entire operating temperature ranges.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128672851","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710212
I. Younus
PSI (Phase Stepped Interferometry) is a well known technique for the measurement of surface deformation. Since in this technique phase characteristic of a linear system is computed using arctangent function, in some points the raw phase data exceeds the value 2/spl pi/. Moreover the surface roughness, phase unwrapping and extra noise imposed from the environment makes the surface look like a original surface with huge impulsive noise and simply using PSI technique does not produce accurate reconstructed surface. In this paper we propose a filtering technique that suppress the noise and enhance the image quality. We propose that the raw phase data should be prefiltered by a mean filter to eliminate Gaussian noise. Then after proper unwrapping treatment the data should be filtered with a RCM (Rank Conditioned Median) filter. This filter is effective at treating impulsive type noise and preserve step edges without blurring.
{"title":"Image enhancement for the phase stepped interferometric process by appropriate filtering","authors":"I. Younus","doi":"10.1109/NAECON.1998.710212","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710212","url":null,"abstract":"PSI (Phase Stepped Interferometry) is a well known technique for the measurement of surface deformation. Since in this technique phase characteristic of a linear system is computed using arctangent function, in some points the raw phase data exceeds the value 2/spl pi/. Moreover the surface roughness, phase unwrapping and extra noise imposed from the environment makes the surface look like a original surface with huge impulsive noise and simply using PSI technique does not produce accurate reconstructed surface. In this paper we propose a filtering technique that suppress the noise and enhance the image quality. We propose that the raw phase data should be prefiltered by a mean filter to eliminate Gaussian noise. Then after proper unwrapping treatment the data should be filtered with a RCM (Rank Conditioned Median) filter. This filter is effective at treating impulsive type noise and preserve step edges without blurring.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130236775","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710196
A. Scarpelli
To research and develop Computer Aided Design (CAD) tools based on VHDL, an analyzer is necessary to translate the source code into an intermediate representation from which back-end tools can be developed. Whether the analyzer is purchased or built, it is secondary to the research, diverting cost and effort from the intended development. The existence of a standard intermediate representation and a freely available VHDL analyzer that translates source code to that representation allows resources to be focused on the productivity enhancing, back-end tools. The SAVANT project provides VHDL researchers with the tools and compatibility to achieve a significant enhancement in the overall effectiveness of basic CAD-in-VHDL research.
{"title":"Standard VHDL analyzer and intermediate representation","authors":"A. Scarpelli","doi":"10.1109/NAECON.1998.710196","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710196","url":null,"abstract":"To research and develop Computer Aided Design (CAD) tools based on VHDL, an analyzer is necessary to translate the source code into an intermediate representation from which back-end tools can be developed. Whether the analyzer is purchased or built, it is secondary to the research, diverting cost and effort from the intended development. The existence of a standard intermediate representation and a freely available VHDL analyzer that translates source code to that representation allows resources to be focused on the productivity enhancing, back-end tools. The SAVANT project provides VHDL researchers with the tools and compatibility to achieve a significant enhancement in the overall effectiveness of basic CAD-in-VHDL research.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121330789","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710102
J. Whitaker
Throughout history, the warfighter has used many rudimentary means to identify his enemy during battle. As technology progressed and the battlefield grew to include the skies, the fighter pilot required more advanced methods to identify friends and enemies at longer ranges during combat. In 1992, Wright Laboratory (WL) (now part of Air Force Research Laboratory (AFRL) located at Wright-Patterson AFB, OH) conducted a Combat ID (CID) study at the request of Air Combat Command (ACC). The study investigated the impact an improved intrinsic non-cooperative target recognition (NCTR) capability onboard an F-15 fighter aircraft had on mission effectiveness. WL collected data for the study from a man-in-the-loop (MITL) simulation at the Theater Air Command and Control Simulation Facility (TACCSF), located at Kirtland AFB, NM. The results from that study have been well documented and are mentioned briefly in this paper. Subsequently, in 1995, ACC and the CID Integrated Management Team (IMT), located at Hanscom AFB, MA, asked WL to conduct a MITL cooperative ID system study to complement the findings from the 1992 CID study. WL used the TACCSF for this study also.
{"title":"1995 TACCSF cooperative identification study","authors":"J. Whitaker","doi":"10.1109/NAECON.1998.710102","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710102","url":null,"abstract":"Throughout history, the warfighter has used many rudimentary means to identify his enemy during battle. As technology progressed and the battlefield grew to include the skies, the fighter pilot required more advanced methods to identify friends and enemies at longer ranges during combat. In 1992, Wright Laboratory (WL) (now part of Air Force Research Laboratory (AFRL) located at Wright-Patterson AFB, OH) conducted a Combat ID (CID) study at the request of Air Combat Command (ACC). The study investigated the impact an improved intrinsic non-cooperative target recognition (NCTR) capability onboard an F-15 fighter aircraft had on mission effectiveness. WL collected data for the study from a man-in-the-loop (MITL) simulation at the Theater Air Command and Control Simulation Facility (TACCSF), located at Kirtland AFB, NM. The results from that study have been well documented and are mentioned briefly in this paper. Subsequently, in 1995, ACC and the CID Integrated Management Team (IMT), located at Hanscom AFB, MA, asked WL to conduct a MITL cooperative ID system study to complement the findings from the 1992 CID study. WL used the TACCSF for this study also.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123046348","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710129
R. Haren
The Multispectral Air-to-Air Inhouse Feasibility Study has been chartered to adapt the lessons learned from the Brassboard Airborne Multispectral Sensor System Specification (BAMS) program (contract F33615-93-C-1267) from the air-to-ground scenario to the air-to-air search and track scenario. This is an interim report in an investigation of the feasibility of air-to-air multispectral techniques that will generate the basis for a planned follow-on effort. The BAMS effort is developing the capability to detect ground targets in deep-hide and under camouflage by exploiting the spectral characteristics of the target. These same benefits should be adaptable for aerial search. This method of detection is more immune to low contrast or high clutter than a broadband sensor, and allows the use of larger pixels which translates into a much larger search volume. The downside is that the smaller wavebands inherent to multispectral sensors results in a smaller number of collected photons limiting the overall range capability. However, it is expected that multispectral sensors will have a distinct advantage over broadband sensors in the look-down scenario where the background is highly cluttered and the target is low contrast This scenario will be used for a direct comparison between the two sensor approaches. The methodology for determining the detection range capabilities for broadband and multispectral sensors is presented in this paper along with a summary of the approach for determining the expected performance of multispectral aerial search sensors.
{"title":"A method of determining accurate range capability for multispectral infrared sensors using simple modeling techniques","authors":"R. Haren","doi":"10.1109/NAECON.1998.710129","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710129","url":null,"abstract":"The Multispectral Air-to-Air Inhouse Feasibility Study has been chartered to adapt the lessons learned from the Brassboard Airborne Multispectral Sensor System Specification (BAMS) program (contract F33615-93-C-1267) from the air-to-ground scenario to the air-to-air search and track scenario. This is an interim report in an investigation of the feasibility of air-to-air multispectral techniques that will generate the basis for a planned follow-on effort. The BAMS effort is developing the capability to detect ground targets in deep-hide and under camouflage by exploiting the spectral characteristics of the target. These same benefits should be adaptable for aerial search. This method of detection is more immune to low contrast or high clutter than a broadband sensor, and allows the use of larger pixels which translates into a much larger search volume. The downside is that the smaller wavebands inherent to multispectral sensors results in a smaller number of collected photons limiting the overall range capability. However, it is expected that multispectral sensors will have a distinct advantage over broadband sensors in the look-down scenario where the background is highly cluttered and the target is low contrast This scenario will be used for a direct comparison between the two sensor approaches. The methodology for determining the detection range capabilities for broadband and multispectral sensors is presented in this paper along with a summary of the approach for determining the expected performance of multispectral aerial search sensors.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122351126","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710093
A. El-Sinawi
This paper presents a new approach in estimating the parameters of a dynamic system from an initial and relatively inaccurate state-space model. The proposed approach is based on determining an optimal control law that minimizes a quadratic performance index for a free final state condition by means of solving a two-point boundary-value problem. The control input to both the model and the physical system is assumed to be the difference between their outputs. The proposed approach is applied to a second order system that has a modeling error of about 40%. The new approach succeeded in reducing the modeling error to about 5%.
{"title":"A new approach in estimating the dynamics matrix of a system","authors":"A. El-Sinawi","doi":"10.1109/NAECON.1998.710093","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710093","url":null,"abstract":"This paper presents a new approach in estimating the parameters of a dynamic system from an initial and relatively inaccurate state-space model. The proposed approach is based on determining an optimal control law that minimizes a quadratic performance index for a free final state condition by means of solving a two-point boundary-value problem. The control input to both the model and the physical system is assumed to be the difference between their outputs. The proposed approach is applied to a second order system that has a modeling error of about 40%. The new approach succeeded in reducing the modeling error to about 5%.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116741617","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710137
A. Plutov, A. Pinsky
This paper investigates design, development and testing of new cooperative avionics algorithms (CAAs) in low-cost research and development (R&D) simulation environment These CAAs may be later implemented in avionics systems. Interaction of cooperative avionics algorithms in a complex systems requires off-line simulations at various development stages to achieve a reasonable estimation of system behavior with new CAAs. The R&D stage of CAAs in general does not require use of visual systems and pilot-in-the-loop, thus enabling possible use of low-cost simulator, which at the same time should be modular and easy-in-use. After developing and testing these CAA's in low-cost simulated environment, it is possible to transfer the models to other, more complicated systems with visual aids and pilot-in-the-loop for further development. In this paper use of low-cost simulator is shown on examples of Data Link (DL) and Sensor Fusion (SF) algorithms' development.
{"title":"Design, development and testing of cooperative avionics algorithms in low-cost research and development simulation environment","authors":"A. Plutov, A. Pinsky","doi":"10.1109/NAECON.1998.710137","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710137","url":null,"abstract":"This paper investigates design, development and testing of new cooperative avionics algorithms (CAAs) in low-cost research and development (R&D) simulation environment These CAAs may be later implemented in avionics systems. Interaction of cooperative avionics algorithms in a complex systems requires off-line simulations at various development stages to achieve a reasonable estimation of system behavior with new CAAs. The R&D stage of CAAs in general does not require use of visual systems and pilot-in-the-loop, thus enabling possible use of low-cost simulator, which at the same time should be modular and easy-in-use. After developing and testing these CAA's in low-cost simulated environment, it is possible to transfer the models to other, more complicated systems with visual aids and pilot-in-the-loop for further development. In this paper use of low-cost simulator is shown on examples of Data Link (DL) and Sensor Fusion (SF) algorithms' development.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127640072","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 : 1998-07-13DOI: 10.1109/NAECON.1998.710208
M. Alam
An efficient technique for restoring the original from a blurred image using the concept of fringe-adjusted joint transform. Correlation is proposed. This technique employs Fourier plane apodization using the reference image power spectrum to deblur the distorted image. The performance of the proposed technique has been enhanced significantly by employing the Fourier plane image subtraction especially for noisy input scenes involving multiple objects. The image subtraction technique eliminates the unwanted zero-order term and crosscorrelation terms produced by similar input scene objects while alleviating the effect of noise that may be present in the unknown input scene. Computer simulation results using noise-free and noise corrupted input scenes are presented to verify the performance of the proposed technique.
{"title":"Image restoration using optical correlation","authors":"M. Alam","doi":"10.1109/NAECON.1998.710208","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710208","url":null,"abstract":"An efficient technique for restoring the original from a blurred image using the concept of fringe-adjusted joint transform. Correlation is proposed. This technique employs Fourier plane apodization using the reference image power spectrum to deblur the distorted image. The performance of the proposed technique has been enhanced significantly by employing the Fourier plane image subtraction especially for noisy input scenes involving multiple objects. The image subtraction technique eliminates the unwanted zero-order term and crosscorrelation terms produced by similar input scene objects while alleviating the effect of noise that may be present in the unknown input scene. Computer simulation results using noise-free and noise corrupted input scenes are presented to verify the performance of the proposed technique.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134514760","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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