Conferences related to Coherence

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2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)

CAOL*2019 will provide a forum for scientists in a wide area of laser physics, optoelectronics, optics and photonics. The conference will cover wide frontiers in laser physics, photonics, nanotechnology, material physics, nonlinear optics and optical communications. Its characteristic feature is a stronger emphasis on the mathematical, physical and technological aspects of the problems in hand, together with detailed analysis of application problems. This year in the frame of CAOL we will organize two accompanying events, the Workshop on Data Science in Modern Optoelectronics and Laser Engineering and the Workshop “Measurement Uncertainty: Scientific, Standard, Applied and Methodical Aspects” (UM*2019). DSMOLE*2019 will be dedicated to problems arising from merging of modern optoelectronics and laser engineering with data science, artificial and computational intelligence. UM*2019 will cover cutting edge developments in metrology and adjacent fields.

  • 2016 IEEE 7th International Conference on Advanced Optoelectronics and Lasers (CAOL)

    The conference will cover wide frontiers in laser physics, nanotechnology, new materials, nonlinear optics and optical communications. Its characteristic feature is a stronger emphasis on the mathematical, physical and technological aspects of the researches, together with a detail analysis of the application problems. The technical program traditionally consists of invited lectures and regular contributed papers. The technical program traditionally consists of invited lectures and regular contributed papers (oral and poster sessions). The previous conferences were successfully held in since 1999 in different cities of Ukraine and Mexico. Information on the previous international meetings on optoelectronics and lasers can be found in IEEE Photonics Society Newsletter (formerly IEEE/LEOS Newsletters): 4-1999, 4-2000, 4-2001, 3- 2004 2-2006, 2-2009, 4-2010, 4-2011 etc.

  • 2013 International Conference on Advanced Optoelectronics and Lasers (CAOL)

    CAOL*2013 will provide a forum for scientists in a wide area of laser physics and optoelectronics. The conference will cover wide frontiers in laser physics, nanotechnology, new materials, nonlinear optics and optical communications. Its characteristic feature is a stronger emphasis on the mathematical, physical and technological aspects of the researches, together with a detail analysis of the application problems. The technical program traditionally consists of invited lectures and regular contributed papers. The previous conferences were successfully held in 2003, 2005, 2008 and 2010 in Crimea, and in 2006 in Guanajuato, Mexico. Information on the previous international meetings on optoelectronics and lasers can be found in IEEE Photonics Society Newsletter (formerly IEEE/LEOS Newsletters): 4-1999, 4-2000, 4-2001, 3-2004 2-2006, 2-2009, 4-2010, 4-2011 etc.

  • 2010 International Conference on Advanced Optoelectronics and Lasers (CAOL)

    The conference cover wide frontiers in laser physics, nanotechnology, new materials, nonlinear optics and optical communications. Its characteristic feature is a stronger emphasis on the mathematical, physical and technological aspects of the researches, together with analysis of the application problems. The technical program consists of invited and regular contributed papers.

  • 2008 International Conference on Advanced Optoelectronics and Lasers (CAOL)

    The 4-nd International Conference on Advanced Optoelectronics and Lasers (CAOL'2008) will be held in Alushta, Crimea, Ukraine, from September 29 to October 4, 2008. CAOL'2008 will provide a forum for experts in a wide area of laser physics and optoelectronics. The previous conferences were successfully provided in 2003 and 2005 in Crimea, and in 2006 in Guanajuato, Mexico.

  • 2005 International Conference on Advanced Optoelectronics and Lasers (CAOL)

  • 2003 International Conference on Advanced Optoelectronics and Lasers (CAOL)


2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII)

The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power


2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore


2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

CLEO®/Europe will showcase the latest developments in a wide range of laser and photonics areas including laser source development, materials, ultrafast science, fibre optics, nonlinear optics, terahertz sources, high-field physics, optical telecommunications, nanophotonics, biophotonics.EQEC will feature the fundamentals of quantum optics, quantum information, atom optics, ultrafast optics, nonlinear phenomena and self-organization, plasmonics and metamaterials, fundamental nanooptics, theoretical and computational photonics.


2019 IEEE International Conference on Image Processing (ICIP)

The International Conference on Image Processing (ICIP), sponsored by the IEEE SignalProcessing Society, is the premier forum for the presentation of technological advances andresearch results in the fields of theoretical, experimental, and applied image and videoprocessing. ICIP 2019, the 26th in the series that has been held annually since 1994, bringstogether leading engineers and scientists in image and video processing from around the world.


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Periodicals related to Coherence

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Audio, Speech, and Language Processing, IEEE Transactions on

Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...


Biomedical Engineering, IEEE Reviews in

The IEEE Reviews in Biomedical Engineering will review the state-of-the-art and trends in the emerging field of biomedical engineering. This includes scholarly works, ranging from historic and modern development in biomedical engineering to the life sciences and medicine enabled by technologies covered by the various IEEE societies.


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


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Xplore Articles related to Coherence

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3D ultrasound imaging of tissue anisotropy using spatial coherence: Comparison between plane waves and diverging waves

2017 IEEE International Ultrasonics Symposium (IUS), 2017

After a myocardium infarction, cell loss is irremediable leading to a progressive local disorganization and change in the tissue structure altering heart function. An imaging method able to render the local tissue directivity would be a powerful tool to characterize the extent of the lesion. In this field, diffusion MRI is the reference. Because of its long acquisition time and ...


Complete spatial characterization of an optical wavefront using a variable-separation pinhole Pair

2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC, 2013

Here we demonstrate a new technique for completely characterizing the spatial properties of high harmonic generation (HHG), capable of recovering the frequency-resolved intensity and phase profiles, as well as the spatial coherence of the source. In keeping with the nomenclature established by previous work, we dub our technique SCIMITAR (Scanning Interference Measurement for Integrated Transverse Analysis of Radiation).


Coherence beamforming and its applications to the difficult-to-image patient

2017 IEEE International Ultrasonics Symposium (IUS), 2017

Poor quality ultrasound images and inadequate or suboptimal visualization of imaging targets is a common problem in individuals that are overweight or obese. The overweight and obese population in the United States has reached staggering proportions, with nearly 2 out of every 3 individuals overweight or obese. Despite advances in ultrasound imaging technology, techniques for these difficult-to-image patients are lacking. ...


Invited talks

2013 IEEE 21st Annual Symposium on High-Performance Interconnects, 2013

These invited talks discuss the following: Architecture and performance of the Tilera TILE-Gx8072 manycore processor; Overview and next steps for the Open Compute Project.


Coherent Plane-Wave Compounding Based on Normalized Autocorrelation Factor

IEEE Access, 2018

Coherent plane-wave compounding (CPWC) is an effective method to improve the image quality of ultrasound plane-wave imaging (PWI), which coherently sums the delay-and-sum (DAS) beamforming outputs of PWI at different steering angles. However, due to the data-independent nature, the DAS obtains limited imaging resolution and contrast. Therefore, various adaptive beamforming methods have been presented to achieve improved imaging quality. In ...


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Educational Resources on Coherence

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IEEE-USA E-Books

  • 3D ultrasound imaging of tissue anisotropy using spatial coherence: Comparison between plane waves and diverging waves

    After a myocardium infarction, cell loss is irremediable leading to a progressive local disorganization and change in the tissue structure altering heart function. An imaging method able to render the local tissue directivity would be a powerful tool to characterize the extent of the lesion. In this field, diffusion MRI is the reference. Because of its long acquisition time and the difficulty to tackle organ motion, faster imaging strategies such as ultrasound, are mandatory for such clinical applications. One of them is the spatial coherence of US waves, already developed in focused and plane waves (2D and 3D) but never in diverging waves [Papadacci, UFFC 2014]. The advantage of diverging waves is to create an image with a higher field of view, which is more appropriate to in vivo cardiac applications. The purpose of this work is to use 2D spatial coherence to determine the fibers orientation and to compare results in 3D steered plane and diverging waves.

  • Complete spatial characterization of an optical wavefront using a variable-separation pinhole Pair

    Here we demonstrate a new technique for completely characterizing the spatial properties of high harmonic generation (HHG), capable of recovering the frequency-resolved intensity and phase profiles, as well as the spatial coherence of the source. In keeping with the nomenclature established by previous work, we dub our technique SCIMITAR (Scanning Interference Measurement for Integrated Transverse Analysis of Radiation).

  • Coherence beamforming and its applications to the difficult-to-image patient

    Poor quality ultrasound images and inadequate or suboptimal visualization of imaging targets is a common problem in individuals that are overweight or obese. The overweight and obese population in the United States has reached staggering proportions, with nearly 2 out of every 3 individuals overweight or obese. Despite advances in ultrasound imaging technology, techniques for these difficult-to-image patients are lacking. Acoustic reverberation is a common factor in these individuals and is a significant contributor to the poor image quality. Specifically, diffuse acoustic reverberation is problematic because it appears similar to common tissue texture in ultrasound images, thereby exacerbating the inadequate and suboptimal visualization.

  • Invited talks

    These invited talks discuss the following: Architecture and performance of the Tilera TILE-Gx8072 manycore processor; Overview and next steps for the Open Compute Project.

  • Coherent Plane-Wave Compounding Based on Normalized Autocorrelation Factor

    Coherent plane-wave compounding (CPWC) is an effective method to improve the image quality of ultrasound plane-wave imaging (PWI), which coherently sums the delay-and-sum (DAS) beamforming outputs of PWI at different steering angles. However, due to the data-independent nature, the DAS obtains limited imaging resolution and contrast. Therefore, various adaptive beamforming methods have been presented to achieve improved imaging quality. In this paper, an adaptive weighting factor named normalized autocorrelation factor (NAF), which is derived by the normalized autocorrelation function (NACF), is proposed for CPWC. Simulated and experimental data provided by the plane wave imaging challenge in medical ultrasound organizers are used to evaluate the proposed method. Results show that the NAF-weighted CPWC can achieve an improved imaging quality in terms of lateral resolution, contrast ratio (CR), and contrast-to-noise ratio. In simulated images, the maximum improvements of the lateral full width at half maximum and CR are 60.3% and 29.7%, respectively. For experimental images, the corresponding improvements are 32.1% and 23.3%. The NAF is also compared with the generalized coherence factor (GCF) and short-lag spatial coherence (SLSC), and the simulation and phantom experimental results show that the NAF can get better lateral resolution and speckle signal-to-noise ratio (sSNR). For in-vivo data, the NAF shows distinct advantages over GCF and SLSC in preserving anatomical structures so as to get better CR, CNR, and sSNR. In addition, with a low computational complexity and load, the proposed method has potential to be applied to ultrafast ultrasound imaging for high quality images.

  • Spatially incoherent random lasers for full field optical coherence tomography

    We demonstrate control of the spatial coherence of random laser emission by tuning the scattering strength and excitation volume. The optimized, spatially incoherent source is applied to full-field optical coherence tomography to mitigate crosstalk.

  • Path dependency and angular anisoplanatism in non-Kolmogorov turbulence

    We examine the effect of non-Kolmogorov turbulence on angular anisoplanatism. Generalized expressions for the isoplanatic angle in turbulence with non- Kolmogorov power-laws are developed in terms of the effective turbulence height, related turbulence moments, and characteristics lengths such as Striblings equivalent Fried parameter. We then compare the effective turbulence height and isoplanatic angle using the Hufnagel-Valley 5-7 (HV 5-7) and Mauna Kea (HV-MK) turbulence profiles at both the upper and lower power- law limits. In addition, using the HV-MK profile we consider the effect of a single non-Kolmogorov turbulent shear layer. We find that, for fixed path length and spatial coherence, a smaller power-law reduces the isoplanatic angle while larger power-laws increase it relative to theKolmogorov case. In contrast, when the turbulence strength profile is fixed smaller power law exponent the isoplanatic angle increases and decreases when the power law exponent is larger than the Kolmogorov value. Similar results are shown for the case of non-Kolmogorov shear layers.

  • Research on common path OCT system's light source and interferometer module

    Optical light source is one of the most important factors of the common path optical coherence tomography (CPOCT) system. Not only the bandwidth of the light source determines the axis resolution of the CPOCT, the central wavelength of the light source also determines the measurement depth of the bio-sample. Generally speaking, the most important issue of selecting the light source of CPOCT is the following three factors: near infrared light, high irradiation and low coherence. Furthermore, in order to get the CPOCT signal, the optical path difference (OPD) of the reference arm and the signal arm should equal to zero. Compared with the traditional OCT system, the reference arm and the signal arm of the common path interferometer module INT- COM-1300 are exactly symmetrical, which overcomes the disadvantage of the traditional OCT system's separation structure of the reference arm and the signal arm. Based on this compact common path structure, the influence of the outside environment such as vibration and temperature change is greatly decreased and the volume of the CPOCT system is reduced.

  • Seam Searching-Based Pixel Fusion for Image Retargeting

    This paper presents a new image retargeting method based on seam searching and pixel fusion. First, the importance map of the original image, which is represented by the saliency of every pixel, is generated. Second, all the pixels in the original image are divided into W (width of the original image) groups with the help of seam searching. Then, it performs inter-row coherence filtering on importance map to maintain the spatial coherence, and directly utilizes the filtered importance map to generate the scaling map. Finally, after pixel fusion with the scaling map, the image can be retargeted effectively. Experimental results show that our method is able to provide visually pleasing resized images.

  • In vivo performance evaluation of short-lag spatial coherence and harmonic spatial coherence imaging in fetal ultrasound

    Ultrasonography is the primary imaging modality used for diagnostic assessment of fetal and maternal health during pregnancy. However, a large proportion of fetal ultrasound exams suffer from inadequate or lack of visualization of clinically relevant structures due to acoustical noise or clutter. These undesirable effects are even more pronounced in overweight and obese mothers. In previous work our group has introduced short-lag spatial coherence (SLSC) and harmonic spatial coherence imaging (HSCI) as methods for clutter reduction. These have been shown to be successful in improving image contrast and border delineation in both simulations and in vivo experiments on liver and cardiac imaging. We extend the application of these techniques to fetal ultrasound imaging. We collected individual channel RF data on 11 volunteers in their first trimester of pregnancy. The amount of intrinsic clutter varied across the volunteers. These data sets were used to generate matched fundamental B-mode, SLSC, harmonic B-mode, and HSCI images. These images were compared qualitatively by assessing image texture and target detectability and quantitatively using SNR, CNR, and contrast. SLSC and HSCI images showed significant improvements across all imaging metrics compared to B-mode and harmonic B-mode, respectively. The improvements in clutter suppression and improved conspicuity of target structures were greatest for poor quality B-mode images. Clutter levels in these images, measured in a region of amniotic fluid compared to a region of uniform speckle, were measured to be 15 dB for B-mode versus 27 dB for SLSC, and 17 dB for harmonic B-mode versus 30 dB for HSCI. CNR for the same set of images improved from 1.4 to 2.5 for B-mode to SLSC and from 1.4 to 3.1 for harmonic B-mode to HSCI.



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