Dr. Anni K. Vuorenkoski Dalgleish Profile

Dr. Anni K. Vuorenkoski Dalgleish

Research Associate at Harbor Branch Oceanographic Institute

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 25 May 2018 Presentation + Paper

Development and assessment of lidar modeling to retrieve IOPs

Christopher Strait, Michael Twardowski, Fraser Dalgleish, Alberto Tonizzo, Anni Vuorenkoski

Proceedings Volume 10631, 106310U (2018) https://doi.org/10.1117/12.2309998

KEYWORDS: LIDAR, Signal attenuation, Multiple scattering, Particles, Scattering, Monte Carlo methods, Light scattering

Read Abstract +

Proceedings Article | 24 May 2018 Paper

MEMS-based serial LiDAR detection and imaging architecture for automated surveillance of undersea marine life

Fraser Dalgleish, Bing Ouyang, Anni Vuorenkoski, Brian Ramos, Yanjun Li, Zheng Cao, Jose Principe

Proceedings Volume 10677, 1067726 (2018) https://doi.org/10.1117/12.2309997

KEYWORDS: Ocean optics, LIDAR, Cameras, Imaging systems, Image resolution, Acoustics, Signal processing, Transmitters, Surveillance, Signal attenuation

Read Abstract +

Proceedings Article | 14 May 2018 Paper

Compressing two ways: the initial study of an underwater inflatable co-prime sonar array (UICSA)

Bing Ouyang, Yanjun Li, Tongdi Zhou, Tsung-Chow Su, Fraser Dalgleish, Anni Dalgleish, Fauzia Ahmad

Proceedings Volume 10658, 106580H (2018) https://doi.org/10.1117/12.2311575

KEYWORDS: Prototyping, Sensors, Reconstruction algorithms, Surveillance, Compressed sensing, Defense and security

Read Abstract +

Proceedings Article | 22 May 2017 Presentation + Paper

The development of an underwater pulsed compressive line sensing imaging system

Bing Ouyang, Sue Gong, Weilin Hou, Fraser Dalgleish, Frank Caimi, Anni Vuorenkoski

Proceedings Volume 10186, 101860G (2017) https://doi.org/10.1117/12.2265890

KEYWORDS: Visual compression, Visualization, Environmental sensing, Image segmentation, Imaging systems, Spatial light modulators, Prototyping, Semiconductor lasers, Sensing systems, Compressed sensing, Digital micromirror devices, Turbulence, Underwater imaging, LIDAR

Read Abstract +

SPIE Journal Paper | 3 May 2017

Integrating dynamic and distributed compressive sensing techniques to enhance image quality of the compressive line sensing system for unmanned aerial vehicles application

Bing Ouyang, Weilin Hou, Frank Caimi, Fraser Dalgleish, Anni Vuorenkoski, Cuiling Gong

JARS, Vol. 11, Issue 03, 032407, (May 2017) https://doi.org/10.1117/12.10.1117/1.JRS.11.032407

KEYWORDS: Image quality, Digital image correlation, Compressed sensing, Imaging systems, Chromium, Backscatter, Image compression, Image restoration, Sensing systems, Unmanned aerial vehicles

Read Abstract +

Proceedings Article | 17 May 2016 Paper

Experimental study of a DMD based compressive line sensing imaging system in the turbulence environment

Bing Ouyang, Weilin Hou, Cuiling Gong, Frank Caimi, Fraser Dalgleish, Anni Vuorenkoski

Proceedings Volume 9827, 982709 (2016) https://doi.org/10.1117/12.2229754

KEYWORDS: Turbulence, Imaging systems, Digital micromirror devices, Sensing systems, Optical turbulence, Digital micromirror devices, Environmental sensing, Prototyping, Receivers, Data acquisition, Image quality

Read Abstract +

Proceedings Article | 15 March 2016 Paper

Experimental study of a DMD based compressive line sensing imaging system in the turbulence environment

Bing Ouyang, Weilin Hou, Cuiling Gong, Frank Caimi, Fraser Dalgleish, Anni Vuorenkoski, Xifeng Xiao, David Voelz

Proceedings Volume 9761, 97610K (2016) https://doi.org/10.1117/12.2212426

KEYWORDS: Imaging systems, Turbulence, Digital micromirror devices, Sensing systems, Compressed sensing, Optical turbulence, Environmental sensing, LIDAR, Electro optical imaging, Compressive imaging, Prototyping, Receivers, Sensors, Scattering

Read Abstract +

Proceedings Article | 28 May 2015 Paper

Semi-empirical inversion technique for retrieval of quantitative attenuation profiles with underwater scanning lidar systems

Anni Vuorenkoski, Fraser Dalgleish, Michael Twardowski, Bing Ouyang, Charles Trees

Proceedings Volume 9459, 94590E (2015) https://doi.org/10.1117/12.2180158

KEYWORDS: LIDAR, Signal attenuation, Sensors, Scattering, Backscatter, Model-based design, Underwater imaging, Calibration, Multiple scattering, Ocean optics

Read Abstract +

Proceedings Article | 19 May 2015 Paper

Distributed compressive sensing vs. dynamic compressive sensing: improving the compressive line sensing imaging system through their integration

Bing Ouyang, Weilin Hou, Frank Caimi, Fraser Dalgleish, Anni Vuorenkoski, Sue Gong

Proceedings Volume 9459, 94590D (2015) https://doi.org/10.1117/12.2180130

KEYWORDS: Compressed sensing, Imaging systems, Backscatter, Image compression, Scattering, Image quality, Sensing systems, Signal attenuation, Prototyping, Computer programming

Read Abstract +

Proceedings Article | 14 May 2015 Paper

Near-infrared compressive line sensing imaging system using individually addressable laser diode array

Bing Ouyang, Weilin Hou, Frank Caimi, Fraser Dalgleish, Anni Vuorenkoski, Sue Gong, Walter Britton

Proceedings Volume 9484, 94840I (2015) https://doi.org/10.1117/12.2178804

KEYWORDS: Digital micromirror devices, Spatial light modulators, Prototyping, Imaging systems, Semiconductor lasers, Image compression, Calibration, Sensors, Fiber optic illuminators, Receivers

Read Abstract +

Proceedings Article | 23 May 2014 Paper

3D imaging using compressive line sensing serial imaging system

Bing Ouyang, Frank Caimi, Fraser Dalgleish, Gero Nootz, Anni Vuorenkoski

Proceedings Volume 9109, 91090V (2014) https://doi.org/10.1117/12.2050667

KEYWORDS: Imaging systems, Digital micromirror devices, Stereoscopy, Scattering, Sensing systems, LIDAR, Image compression, Computer programming, Pulsed laser operation, Compressed sensing

Read Abstract +

Proceedings Article | 23 May 2014 Paper

Experimental studies of the compressive line sensing underwater serial imaging system

Bing Ouyang, Weilin Hou, Fraser Dalgleish, Frank Caimi, Gero Nootz, Anni Vuorenkoski

Proceedings Volume 9111, 91110M (2014) https://doi.org/10.1117/12.2050691

KEYWORDS: Digital micromirror devices, Imaging systems, Image compression, Sensing systems, Computer programming, Prototyping, Scattering, Image quality, Spatial light modulators, Image restoration

Read Abstract +

SPIE Journal Paper | 25 April 2014

Physical layer simulator for undersea free-space laser communications

Fraser Dalgleish, Joseph Shirron, David Rashkin, Thomas Giddings, Anni K. Vuorenkoski Dalgleish, Ionut Cardei, Bing Ouyang, Frank Caimi, Mihaela Cardei

OE, Vol. 53, Issue 05, 051410, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.5.051410

KEYWORDS: Optical simulations, Monte Carlo methods, Signal to noise ratio, Sensors, Signal attenuation, Laser scattering, Scattering, Receivers, Signal detection, Computer simulations

Read Abstract +

SPIE Journal Paper | 22 April 2014

Compressive line sensing underwater imaging system

Bing Ouyang, Fraser Dalgleish, Frank Caimi, Thomas Giddings, Walter Britton, Anni Vuorenkoski, Gero Nootz

OE, Vol. 53, Issue 05, 051409, (April 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.5.051409

KEYWORDS: Imaging systems, Sensing systems, Underwater imaging, Image compression, Receivers, Image quality, Spatial light modulators, Signal attenuation, Compressed sensing, Scattering

Read Abstract +

Proceedings Article | 3 June 2013 Paper

Experimental validation of an undersea free space laser network simulator in turbid coastal conditions

David Rashkin, Fraser Dalgleish, Ionut Cardei, Bing Ouyang, Anni Vuorenkoski, Mihaela Cardei

Proceedings Volume 8724, 872404 (2013) https://doi.org/10.1117/12.2019192

KEYWORDS: Monte Carlo methods, Receivers, Sensors, Free space optics, Ocean optics, Data communications, Scattering, Transmitters, Data modeling, Interference (communication)

Read Abstract +

Proceedings Article | 3 June 2013 Paper

In situ laser sensing of mixed layer turbulence

Fraser Dalgleish, Weilin Hou, Anni Vuorenkoski, Gero Nootz, Bing Ouyang

Proceedings Volume 8724, 87240D (2013) https://doi.org/10.1117/12.2019193

KEYWORDS: LIDAR, Turbulence, Backscatter, Water, Sensors, Optical turbulence, Temperature metrology, Profiling, High speed cameras, Laser scattering

Read Abstract +

This paper will discuss and compare some recent oceanic test results from the Bahamas Optical Turbulence Exercise (BOTEX) cruise, where vertical profiling was conducted with both time-resolved laser backscatter measurements being acquired via a subsurface light detection and ranging (lidar) profiling instrument, and laser beam forward deflection measurements were acquired from a matrix of continuous wave (cw) laser beams (i.e. structured lighting) being imaged in the forward direction with a high speed camera over a one-way path, with both transmitter and camera firmly fixed on a rigid frame. From the latter, it was observed that when within a natural turbulent layer, the laser beams were being deflected from their still water location at the image plane, which was 8.8 meters distance from the laser dot matrix transmitter. As well as suggesting that the turbulent structures being encountered were predominately larger than the beam diameter, the magnitude of the deflection has been confirmed to correlate with the temperature dissipation rate. The profiling lidar measurements which were conducted in similar conditions, also used a narrow collimated laser beam in order to resolve small-scale spatial structure, but with the added attribute that sub-nanosecond short pulse temporal profile could potentially resolve small-scale vertical structure. In the clear waters of the Tongue of the Ocean in the Bahamas, it was hypothesized that the backscatter anomalies due to the effect of refractive index discontinuities (i.e. mixed layer turbulence) would be observable. The processed lidar data presented herein indicates that higher backscatter levels were observed in the regions of the water column which corresponded to higher turbulent mixing which occurs at the first and second themoclines. At the same test stations that the laser beam matrix and lidar measurements were conducted, turbulence measurements were made with two non-optical instruments, the Vertical Microstructure Profiler (VMP) and a 3D acoustical Doppler velocimeter with fast conductivity and temperature probes. The turbulence kinetic energy dissipation rate and the temperature dissipation rates were calculated from both these setups in order to characterize the physical environments and corroborate with the laser measurements. To further investigate the utility of elastic lidar in detecting small-scale turbulent structures, controlled laboratory experiments were also conducted, with the objective of concurrently acquiring both the laser beam spatial characteristics in the forward direction and the laser backscatter temporal profile from each transmitted sub-nanosecond pulse. An artificial refractive index discontinuity was generated in clear test tank conditions by placing a clean ice-filled carboy above the laser beam propagation path. The results from both field and laboratory experiments confirm our hypothesis that turbulent layers are detectable by lidar sensors, and motivates that more research and lidar instrumentation development is needed to better quantify turbulence, especially for mitigating associated performance degrading effects for the U.S. Navy’s next generation electro-optic (EO) systems, including active laser imaging and laser communications.

Proceedings Article | 31 May 2013 Paper

Compressive line sensing underwater imaging system

B. Ouyang, F. Dalgleish, A. Vuorenkoski, F. Caimi, W. Britton

Proceedings Volume 8717, 871705 (2013) https://doi.org/10.1117/12.2016057

KEYWORDS: Imaging systems, Sensing systems, Receivers, Spatial light modulators, Underwater imaging, Matrices, Electro optical systems, Binary data, Image quality, Laser scattering

Read Abstract +

SPIE Journal Paper | 1 March 2013

Compressive sensing underwater laser serial imaging system

Bing Ouyang, Fraser Dalgleish, Frank Caimi, Thomas Giddings, Joseph Shirron, Anni Vuorenkoski, Walter Britton, Benjamin Metzger, Brian Ramos, Gero Nootz

JEI, Vol. 22, Issue 02, 021010, (March 2013) https://doi.org/10.1117/12.10.1117/1.JEI.22.2.021010

KEYWORDS: Imaging systems, Compressed sensing, Receivers, Binary data, Matrices, Electro optical modeling, Monte Carlo methods, Image processing, Modulation, Digital micromirror devices

Read Abstract +

Proceedings Article | 12 June 2012 Paper

Bahamas Optical Turbulence Exercise (BOTEX): preliminary results

Weilin Hou, Ewa Jorosz, Fraser Dalgleish, Gero Nootz, Sarah Woods, Alan Weidemann, Wesley Goode, Anni Vuorenkoski, B. Metzger, B. Ramos

Proceedings Volume 8372, 837206 (2012) https://doi.org/10.1117/12.920740

KEYWORDS: Turbulence, Optical turbulence, Ocean optics, Sensors, Scattering, Imaging systems, Particles, Water, Image transmission, High speed cameras

Read Abstract +

The Bahamas Optical Turbulence Exercise (BOTEX) was conducted in the coastal waters of Florida and the Bahamas from June 30 to July 12 2011, onboard the R/V FG Walton Smith. The primary objective of the BOTEX was to obtain field measurements of optical turbulence structures, in order to investigate the impacts of the naturally occurring turbulence on underwater imaging and optical beam propagation. In order to successfully image through optical turbulence structures in the water and examine their impacts on optical transmission, a high speed camera and targets (both active and passive) were mounted on a rigid frame to form the Image Measurement Assembly for Subsurface Turbulence (IMAST). To investigate the impacts on active imaging systems such as the laser line scan (LLS), the Telescoping Rigid Underwater Sensor Structure (TRUSS) was designed and implemented by Harbor Branch Oceanographic Institute. The experiments were designed to determine the resolution limits of LLS systems as a function of turbulence induced beam wander at the target. The impact of natural turbulence structures on lidar backscatter waveforms was also examined, by means of a telescopic receiver and a short pulse transmitter, co-located, on a vertical profiling frame. To include a wide range of water types in terms of optical and physical conditions, data was collected from four different locations. . Impacts from optical turbulence were observed under both strong and weak physical structures. Turbulence measurements were made by two instruments, the Vertical Microstructure Profiler (VMP) and a 3D acoustical Doppler velocimeter with fast conductivity and temperature probes, in close proximity in the field. Subsequently these were mounted on the IMAST during moored deployments. The turbulence kinetic energy dissipation rate and the temperature dissipation rates were calculated from both setups in order to characterize the physical environments and their impacts. Beam deflection by multiple point patterns are examined, using high speed camera recordings (300 to 1200 fps), in association with measured turbulence structures. Initial results confirmed our hypothesis that turbulence impacted optical transmissions. They also showed that more research will be needed to better quantify and mitigate such effects, especially for the U.S. Navy's next generation EO systems, including active imaging, lidar and optical communications.

Proceedings Article | 12 June 2012 Paper

Image enhancement for underwater pulsed laser line scan imaging system

B. Ouyang, F. Dalgleish, F. Caimi, A. Vuorenkoski, T. Giddings, J. Shirron

Proceedings Volume 8372, 83720R (2012) https://doi.org/10.1117/12.920710

KEYWORDS: Image processing, Image enhancement, Imaging systems, Point spread functions, Deconvolution, Signal attenuation, Image quality, Pulsed laser operation, Pulse shaping, Signal to noise ratio

Read Abstract +

Proceedings Article | 1 June 2011 Paper

Underwater laser serial imaging using compressive sensing and digital mirror device

Bing Ouyang, Fraser Dalgleish, Frank Caimi, Thomas Giddings, Joseph Shirron, Anni Vuorenkoski, Gero Nootz, Walter Britton, Brian Ramos

Proceedings Volume 8037, 803707 (2011) https://doi.org/10.1117/12.884156

KEYWORDS: Imaging systems, Matrices, Image processing, Binary data, Digital micromirror devices, Laser scattering, Receivers, Compressed sensing, Scattering, Modulation

Read Abstract +

Proceedings Article | 19 May 2011 Paper

Experimental imaging performance evaluation for alternate configurations of undersea pulsed laser serial imagers

Fraser Dalgleish, Anni Vuorenkoski, Gero Nootz, Bing Ouyang, Frank Caimi

Proceedings Volume 8030, 80300B (2011) https://doi.org/10.1117/12.888640

KEYWORDS: Receivers, Scattering, Photons, Sensors, Imaging systems, Signal attenuation, Laser scattering, Pulsed laser operation, Target detection, Particles

Read Abstract +

This paper examines imaging performance bounds for undersea electro-optic identification (EOID) sensors that use pulsed laser line scanners to form serial images, typically utilizing one laser pulse for each formed image element. The experimental results presented include the use of two distinct imaging geometries; firstly where the laser source and single element optical detector are nearly co-aligned (near monostatic) and secondly where the laser source is deployed on a separate platform positioned closer to the target (bistatic) to minimize source-to-target beam spread, volumetric scatter and attenuation, with the detector being positioned much further from the target. The former system uses synchronous scanning in order to significantly limit the required instantaneous angular acceptance function of the detector and has the desired intention of acquiring only ballistic photons that have directly interacted with the target element and the undesirable property of acquiring snake photon contributions that indirectly arrive into the detector aperture via multiple forward scattering over the two-way propagation path. The latter system utilizes a staring detector with a much wider angular acceptance function, the objective being to deliver maximum photon density to each target element and acquire diffuse, snake and ballistic photon contributions in order to maximize the signal. The objective of this work was to experimentally investigate pulse-to-pulse detection statistics for both imaging geometries in carefully controlled particle suspensions, with and without artificially generated random uncharacterized scattering inhomogeneities to assess potential image performance in realistic conditions where large biological and mineral particles, aggregates, thin biological scattering layers and turbulence will exist. More specifically, the study investigates received pulse energy variance in clear filtered water, as well as various well-characterized particle suspensions with and without an artificial thin random scattering layer. Efforts were made to keep device noise constant in order to assess the impact of the environment on extrapolated image quality.

Proceedings Article | 20 April 2010 Paper

Efficient laser pulse dispersion codes for turbid undersea imaging and communications applications

Fraser Dalgleish, Frank Caimi, Anni Vuorenkoski, Walter Britton, Brian Ramos, Thomas Giddings, Joseph Shirron, Charles Mazel

Proceedings Volume 7678, 76780I (2010) https://doi.org/10.1117/12.854775

KEYWORDS: Monte Carlo methods, Scattering, Receivers, Signal attenuation, Laser scattering, Pulsed laser operation, Multiple scattering, Systems modeling, Computing systems, Optical simulations

Read Abstract +

Showing 5 of 23 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years