The Experts below are selected from a list of 12489 Experts worldwide ranked by ideXlab platform
Munther A Gdeisat - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal carrier fringe pattern demodulation using the one dimensional Continuous Wavelet Transform recent progress challenges and suggested developments
Optics and Lasers in Engineering, 2009Co-Authors: Munther A Gdeisat, Abdulbasit Z Abid, David R Burton, Michael J Lalor, Francis Lilley, Christopher J Moore, Mohammed QudeisatAbstract:Abstract This paper presents a thorough discussion on the application of the one-dimensional Continuous Wavelet Transform (1D-CWT) in order to retrieve phase information in temporally and spatially tilted fringe patterns and highlights recent progress and challenges. The paper also suggests some possible future developments for this method. The advantages and drawbacks of the one-dimensional Continuous Wavelet Transform technique are discussed here and in this context are compared to the widely used methods of Fourier fringe analysis, phase stepping and the windowed Fourier Transform. A description is given of the manner in which the CWT phase gradient and phase estimation methods may be used to extract the phase of fringe patterns, and these two methods are compared and contrasted. Five different ridge extraction algorithms are explained and the performance of three of these is evaluated. To alleviate the distortions that may occur at the image borders and at regions close to holes in fringe patterns, two methods are described and evaluated for extending the image edges and for filling in holes within fringe patterns. A novel mother Wavelet is presented which has been designed to improve the ability of the Continuous Wavelet Transform to analyse fringe patterns that contain sudden phase variations. The sampling and structural conditions that are required to obtain ‘correct’ phase are also discussed.
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fringe pattern analysis using a one dimensional modified morlet Continuous Wavelet Transform
Proceedings of SPIE the International Society for Optical Engineering, 2008Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Hussein S Abdulrahman, Francis LilleyAbstract:This paper proposes the use of a modified Morlet Wavelet in order to demodulate fringe patterns in conjunction with the one-dimensional Continuous Wavelet Transform (1D-CWT). Our investigations demonstrate that the modified Morlet Wavelet produces better results compared to the conventional Morlet Wavelet when used in fringe pattern analysis. This novel technique offers superior performance in analysing fringe patterns from objects that exhibit large height variations. This new technique has been used in conjunction with the direct maximum ridge extraction algorithm and an improvement in performance is observed. The algorithm has been tested using both computer-generated and real fringe patterns; and was found to be suitable for fringe pattern demodulation and robust in operation.
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spatial fringe pattern analysis using the two dimensional Continuous Wavelet Transform employing a cost function
Applied Optics, 2007Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Francis LilleyAbstract:We present a novel ridge extraction algorithm for use with the two-dimensional Continuous Wavelet Transform to extract the phase information from a fringe pattern. A cost function is employed for the detection of the ridge. The results of the proposed algorithm on simulated and real fringe patterns are illustrated. Moreover, the proposed algorithm outperforms the maximum ridge extraction algorithm and it is found to be robust and reliable.
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spatial carrier fringe pattern demodulation by use of a two dimensional Continuous Wavelet Transform
Applied Optics, 2006Co-Authors: Munther A Gdeisat, David R Burton, Michael J LalorAbstract:A novel technique that uses a fan two-dimensional (2D) Continuous Wavelet Transform (CWT) to phase demodulate fringe patterns is proposed. The fan 2D CWT algorithm is tested by using computer generated and real fringe patterns. The result of this investigation reveals that the 2D CWT technique is capable of successfully demodulating fringe patterns. The proposed algorithm demodulates fringe patterns without the requirement of removing their background illumination prior to the demodulation process. Also, the algorithm is exceptionally robust against speckle noise. The performance of the 2D CWT technique in fringe pattern demodulation is compared with that of the 1D CWT algorithms. This comparison indicates that the 2D CWT outperforms its 1D counterpart for this application.
Michael J Lalor - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal carrier fringe pattern demodulation using the one dimensional Continuous Wavelet Transform recent progress challenges and suggested developments
Optics and Lasers in Engineering, 2009Co-Authors: Munther A Gdeisat, Abdulbasit Z Abid, David R Burton, Michael J Lalor, Francis Lilley, Christopher J Moore, Mohammed QudeisatAbstract:Abstract This paper presents a thorough discussion on the application of the one-dimensional Continuous Wavelet Transform (1D-CWT) in order to retrieve phase information in temporally and spatially tilted fringe patterns and highlights recent progress and challenges. The paper also suggests some possible future developments for this method. The advantages and drawbacks of the one-dimensional Continuous Wavelet Transform technique are discussed here and in this context are compared to the widely used methods of Fourier fringe analysis, phase stepping and the windowed Fourier Transform. A description is given of the manner in which the CWT phase gradient and phase estimation methods may be used to extract the phase of fringe patterns, and these two methods are compared and contrasted. Five different ridge extraction algorithms are explained and the performance of three of these is evaluated. To alleviate the distortions that may occur at the image borders and at regions close to holes in fringe patterns, two methods are described and evaluated for extending the image edges and for filling in holes within fringe patterns. A novel mother Wavelet is presented which has been designed to improve the ability of the Continuous Wavelet Transform to analyse fringe patterns that contain sudden phase variations. The sampling and structural conditions that are required to obtain ‘correct’ phase are also discussed.
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fringe pattern analysis using a one dimensional modified morlet Continuous Wavelet Transform
Proceedings of SPIE the International Society for Optical Engineering, 2008Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Hussein S Abdulrahman, Francis LilleyAbstract:This paper proposes the use of a modified Morlet Wavelet in order to demodulate fringe patterns in conjunction with the one-dimensional Continuous Wavelet Transform (1D-CWT). Our investigations demonstrate that the modified Morlet Wavelet produces better results compared to the conventional Morlet Wavelet when used in fringe pattern analysis. This novel technique offers superior performance in analysing fringe patterns from objects that exhibit large height variations. This new technique has been used in conjunction with the direct maximum ridge extraction algorithm and an improvement in performance is observed. The algorithm has been tested using both computer-generated and real fringe patterns; and was found to be suitable for fringe pattern demodulation and robust in operation.
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spatial fringe pattern analysis using the two dimensional Continuous Wavelet Transform employing a cost function
Applied Optics, 2007Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Francis LilleyAbstract:We present a novel ridge extraction algorithm for use with the two-dimensional Continuous Wavelet Transform to extract the phase information from a fringe pattern. A cost function is employed for the detection of the ridge. The results of the proposed algorithm on simulated and real fringe patterns are illustrated. Moreover, the proposed algorithm outperforms the maximum ridge extraction algorithm and it is found to be robust and reliable.
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spatial carrier fringe pattern demodulation by use of a two dimensional Continuous Wavelet Transform
Applied Optics, 2006Co-Authors: Munther A Gdeisat, David R Burton, Michael J LalorAbstract:A novel technique that uses a fan two-dimensional (2D) Continuous Wavelet Transform (CWT) to phase demodulate fringe patterns is proposed. The fan 2D CWT algorithm is tested by using computer generated and real fringe patterns. The result of this investigation reveals that the 2D CWT technique is capable of successfully demodulating fringe patterns. The proposed algorithm demodulates fringe patterns without the requirement of removing their background illumination prior to the demodulation process. Also, the algorithm is exceptionally robust against speckle noise. The performance of the 2D CWT technique in fringe pattern demodulation is compared with that of the 1D CWT algorithms. This comparison indicates that the 2D CWT outperforms its 1D counterpart for this application.
Francis Lilley - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal carrier fringe pattern demodulation using the one dimensional Continuous Wavelet Transform recent progress challenges and suggested developments
Optics and Lasers in Engineering, 2009Co-Authors: Munther A Gdeisat, Abdulbasit Z Abid, David R Burton, Michael J Lalor, Francis Lilley, Christopher J Moore, Mohammed QudeisatAbstract:Abstract This paper presents a thorough discussion on the application of the one-dimensional Continuous Wavelet Transform (1D-CWT) in order to retrieve phase information in temporally and spatially tilted fringe patterns and highlights recent progress and challenges. The paper also suggests some possible future developments for this method. The advantages and drawbacks of the one-dimensional Continuous Wavelet Transform technique are discussed here and in this context are compared to the widely used methods of Fourier fringe analysis, phase stepping and the windowed Fourier Transform. A description is given of the manner in which the CWT phase gradient and phase estimation methods may be used to extract the phase of fringe patterns, and these two methods are compared and contrasted. Five different ridge extraction algorithms are explained and the performance of three of these is evaluated. To alleviate the distortions that may occur at the image borders and at regions close to holes in fringe patterns, two methods are described and evaluated for extending the image edges and for filling in holes within fringe patterns. A novel mother Wavelet is presented which has been designed to improve the ability of the Continuous Wavelet Transform to analyse fringe patterns that contain sudden phase variations. The sampling and structural conditions that are required to obtain ‘correct’ phase are also discussed.
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fringe pattern analysis using a one dimensional modified morlet Continuous Wavelet Transform
Proceedings of SPIE the International Society for Optical Engineering, 2008Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Hussein S Abdulrahman, Francis LilleyAbstract:This paper proposes the use of a modified Morlet Wavelet in order to demodulate fringe patterns in conjunction with the one-dimensional Continuous Wavelet Transform (1D-CWT). Our investigations demonstrate that the modified Morlet Wavelet produces better results compared to the conventional Morlet Wavelet when used in fringe pattern analysis. This novel technique offers superior performance in analysing fringe patterns from objects that exhibit large height variations. This new technique has been used in conjunction with the direct maximum ridge extraction algorithm and an improvement in performance is observed. The algorithm has been tested using both computer-generated and real fringe patterns; and was found to be suitable for fringe pattern demodulation and robust in operation.
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spatial fringe pattern analysis using the two dimensional Continuous Wavelet Transform employing a cost function
Applied Optics, 2007Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Francis LilleyAbstract:We present a novel ridge extraction algorithm for use with the two-dimensional Continuous Wavelet Transform to extract the phase information from a fringe pattern. A cost function is employed for the detection of the ridge. The results of the proposed algorithm on simulated and real fringe patterns are illustrated. Moreover, the proposed algorithm outperforms the maximum ridge extraction algorithm and it is found to be robust and reliable.
David R Burton - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal carrier fringe pattern demodulation using the one dimensional Continuous Wavelet Transform recent progress challenges and suggested developments
Optics and Lasers in Engineering, 2009Co-Authors: Munther A Gdeisat, Abdulbasit Z Abid, David R Burton, Michael J Lalor, Francis Lilley, Christopher J Moore, Mohammed QudeisatAbstract:Abstract This paper presents a thorough discussion on the application of the one-dimensional Continuous Wavelet Transform (1D-CWT) in order to retrieve phase information in temporally and spatially tilted fringe patterns and highlights recent progress and challenges. The paper also suggests some possible future developments for this method. The advantages and drawbacks of the one-dimensional Continuous Wavelet Transform technique are discussed here and in this context are compared to the widely used methods of Fourier fringe analysis, phase stepping and the windowed Fourier Transform. A description is given of the manner in which the CWT phase gradient and phase estimation methods may be used to extract the phase of fringe patterns, and these two methods are compared and contrasted. Five different ridge extraction algorithms are explained and the performance of three of these is evaluated. To alleviate the distortions that may occur at the image borders and at regions close to holes in fringe patterns, two methods are described and evaluated for extending the image edges and for filling in holes within fringe patterns. A novel mother Wavelet is presented which has been designed to improve the ability of the Continuous Wavelet Transform to analyse fringe patterns that contain sudden phase variations. The sampling and structural conditions that are required to obtain ‘correct’ phase are also discussed.
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fringe pattern analysis using a one dimensional modified morlet Continuous Wavelet Transform
Proceedings of SPIE the International Society for Optical Engineering, 2008Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Hussein S Abdulrahman, Francis LilleyAbstract:This paper proposes the use of a modified Morlet Wavelet in order to demodulate fringe patterns in conjunction with the one-dimensional Continuous Wavelet Transform (1D-CWT). Our investigations demonstrate that the modified Morlet Wavelet produces better results compared to the conventional Morlet Wavelet when used in fringe pattern analysis. This novel technique offers superior performance in analysing fringe patterns from objects that exhibit large height variations. This new technique has been used in conjunction with the direct maximum ridge extraction algorithm and an improvement in performance is observed. The algorithm has been tested using both computer-generated and real fringe patterns; and was found to be suitable for fringe pattern demodulation and robust in operation.
-
spatial fringe pattern analysis using the two dimensional Continuous Wavelet Transform employing a cost function
Applied Optics, 2007Co-Authors: Abdulbasit Z Abid, Munther A Gdeisat, David R Burton, Michael J Lalor, Francis LilleyAbstract:We present a novel ridge extraction algorithm for use with the two-dimensional Continuous Wavelet Transform to extract the phase information from a fringe pattern. A cost function is employed for the detection of the ridge. The results of the proposed algorithm on simulated and real fringe patterns are illustrated. Moreover, the proposed algorithm outperforms the maximum ridge extraction algorithm and it is found to be robust and reliable.
-
spatial carrier fringe pattern demodulation by use of a two dimensional Continuous Wavelet Transform
Applied Optics, 2006Co-Authors: Munther A Gdeisat, David R Burton, Michael J LalorAbstract:A novel technique that uses a fan two-dimensional (2D) Continuous Wavelet Transform (CWT) to phase demodulate fringe patterns is proposed. The fan 2D CWT algorithm is tested by using computer generated and real fringe patterns. The result of this investigation reveals that the 2D CWT technique is capable of successfully demodulating fringe patterns. The proposed algorithm demodulates fringe patterns without the requirement of removing their background illumination prior to the demodulation process. Also, the algorithm is exceptionally robust against speckle noise. The performance of the 2D CWT technique in fringe pattern demodulation is compared with that of the 1D CWT algorithms. This comparison indicates that the 2D CWT outperforms its 1D counterpart for this application.
Mohammed Qudeisat - One of the best experts on this subject based on the ideXlab platform.
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spatial and temporal carrier fringe pattern demodulation using the one dimensional Continuous Wavelet Transform recent progress challenges and suggested developments
Optics and Lasers in Engineering, 2009Co-Authors: Munther A Gdeisat, Abdulbasit Z Abid, David R Burton, Michael J Lalor, Francis Lilley, Christopher J Moore, Mohammed QudeisatAbstract:Abstract This paper presents a thorough discussion on the application of the one-dimensional Continuous Wavelet Transform (1D-CWT) in order to retrieve phase information in temporally and spatially tilted fringe patterns and highlights recent progress and challenges. The paper also suggests some possible future developments for this method. The advantages and drawbacks of the one-dimensional Continuous Wavelet Transform technique are discussed here and in this context are compared to the widely used methods of Fourier fringe analysis, phase stepping and the windowed Fourier Transform. A description is given of the manner in which the CWT phase gradient and phase estimation methods may be used to extract the phase of fringe patterns, and these two methods are compared and contrasted. Five different ridge extraction algorithms are explained and the performance of three of these is evaluated. To alleviate the distortions that may occur at the image borders and at regions close to holes in fringe patterns, two methods are described and evaluated for extending the image edges and for filling in holes within fringe patterns. A novel mother Wavelet is presented which has been designed to improve the ability of the Continuous Wavelet Transform to analyse fringe patterns that contain sudden phase variations. The sampling and structural conditions that are required to obtain ‘correct’ phase are also discussed.