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Search Publications by: Maritoni Litorja (Fed)

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Displaying 1 - 25 of 49

Spatial frequency domain Mueller matrix imaging

December 14, 2022
Author(s)
Joseph Chue-Sang, Maritoni Litorja, Aaron Goldfain, Thomas A. Germer
Significance: Mueller matrix polarimetry (MMP) and spatial frequency domain imaging (SFDI) are wide-field optical imaging modalities that differentiate tissue primarily by structure alignment and photon transport coefficient, respectively. Because these

Linking mass measured by the quartz crystal microbalance to the SI

February 12, 2020
Author(s)
Corey A. Stambaugh, Hamza Shakeel, Maritoni A. Litorja, Joshua M. Pomeroy
The quartz crystal microbalance has been deployed across industry and academy for the monitoring of the film thickness during depositions. Over a half-a-century of academic and industrial research has gone into understanding the relation between film

Structured Illumination Mueller Matrix Imaging

May 16, 2019
Author(s)
Joseph P. Angelo, Thomas Germer, Maritoni Litorja
We perform Mueller matrix imaging (MMI) of diffusely scattering phantoms under sinusoidal irradiance of varying spatial frequency. Quantitative polarimetric sensing via MMI completely characterizes a sample's polarimetric properties, while structured

Evaluation of Lateral Resolution of Light Field Cameras

September 8, 2018
Author(s)
Sowon Joy Yoon, Peter Bajcsy, Maritoni A. Litorja, James J. Filliben
Light field cameras are an emerging imaging device for acquiring 3-D information of a scene by capturing a field of light rays traveling in space. As light field cameras become portable, hand- held, and affordable, their potential as a 3-D measurement

Evaluation of Lateral and Depth Resolutions of Light Field Cameras

August 1, 2018
Author(s)
Sowon Joy Yoon, Peter Bajcsy, Maritoni A. Litorja, James J. Filliben
In crime scene investigations, 3D forensic evidence such as tire tread and shoe imprints in substances like mud or snow can often provide useful information to identify suspects and victims. This work focuses on evaluating lateral and depth resolutions of

Proceedings of SPIE

March 4, 2015
Author(s)
Maritoni A. Litorja, Aaron A. Urbas, Yuqin Zong
The fluorescent light detected by a clinical imager is assumed to be proportional to the amount of fluorescent substance present in the sample. Unfortunately, there are many factors that can add or subtract to the light signal directly attributable to the

Results of aperture area comparisons for exo-atmospheric total solar irradiance measurements

November 13, 2013
Author(s)
Bettye C. Johnson, Maritoni A. Litorja, Joel B. Fowler, Eric L. Shirley, James J. Butler, Robert A. Barnes
Exo-atmospheric solar irradiance measurements made by the solar irradiance community since 1978 incorporate limiting apertures with diameters measured by a number of metrology laboratories using a variety of techniques. Knowledge of the aperture area is a

Hyperspectral Image Segmentation of the Common Bile Duct

March 8, 2013
Author(s)
Daniel V. Samarov, Eleanor Wehner, Roderich E. Schwarz, Karel Zuzak, Edward Livingston, Maritoni A. Litorja
Over the course of the last several years hyperspectral imaging (HSI) has seen increased usage in biomedicine. Within the medical field in particular HSI has been recognized as having the potential to make an immediate impact by reducing the risks and

Spectral Light source Distribution variations to enhance discrimination of the common bile duct from surroundings in reflectance hyperspectral imaging

March 8, 2013
Author(s)
Maritoni A. Litorja, Mira Fein, Eleanor Wehner, Karel Zuzak, Edward Livingston
The classification of anatomical features using hyperspectral imaging has been a common goal in biomedical hyperspectral imaging. Identification and location of the common bile duct is critical in cholecystectomies, one of the most common surgical

Developing digital tissue phantoms for hyperspectral imaging of ischemic wounds

May 18, 2012
Author(s)
David W. Allen, Jeeseong Hwang, Maritoni A. Litorja, Joseph P. Rice
Biomedical optical imaging has the potential to achieve high spatial resolution and high functional sensitivity for non-invasive assessment of ischemic wounds. However, clinical acceptance of many optical imaging devices is hampered by poor reproducibility

Algorithm Validation Using Multicolor Phantoms

May 9, 2012
Author(s)
Daniel V. Samarov, Matthew L. Clarke, Ji Y. Lee, David W. Allen, Maritoni A. Litorja, Jeeseong Hwang
We present a framework for hyperspectral image (HSI) analysis validation, specifically abundance fraction estimation based on HSI measurements of water soluble dye mixtures printed on microarray chips. In our work we focus on the performance of two

Designing Microarrays Phantoms for Hyperspectral Imaging Validation

May 9, 2012
Author(s)
Matthew L. Clarke, Ji Y. Lee, Daniel V. Samarov, David W. Allen, Maritoni A. Litorja, Ralph Nossal, Jeeseong Hwang
The simple design of custom-tailored microarrays for the characterization of hyperspectral imaging systems and analysis methods for biologically relevant samples. Individual and mixtures of dyes were printed on microscope slides and imaged by a

Hyperspectral Image Projector Applications

February 15, 2012
Author(s)
Joseph P. Rice, Steven W. Brown, David W. Allen, Howard W. Yoon, Maritoni A. Litorja, Jeeseong Hwang
For the past several years NIST has been developing, along with several collaborators, a Hyperspectral Image Projector (HIP). This scene projector produces high-resolution programmable spectra and projects them into dynamic two-dimensional images. The

Validating the LASSO Algorithm by Unmixing Spectral Signatures in Multicolor Phantoms

February 1, 2012
Author(s)
Daniel V. Samarov, Matthew L. Clarke, Ji Y. Lee, David W. Allen, Maritoni A. Litorja, Jeeseong Hwang
As hyperspectral imaging (HSI) sees increased implementation into the biological and medical fields it becomes increasingly important that the algorithms being used to analyze the corresponding output be validated. While certainly important under any

Hyperspectral Imaging and Analysis of Single Erythrocytes

August 12, 2011
Author(s)
Ji Y. Lee, Matthew L. Clarke, Fuyuki Tokumasu, John F. Lesoine, David W. Allen, Robert C. Chang, Maritoni A. Litorja, Jeeseong Hwang
We report a hyperspectral imaging and analysis technique to resolve unique physico-chemical characteristics of subcellular substances in single erythrocytes. We constructed a microscope system installed with a spectral light engine capable of controlling

Characterization of Hyperspectral Imaging and Analysis via Microarray Printing of Dyes

February 22, 2011
Author(s)
Matthew L. Clarke, Maritoni A. Litorja, David W. Allen, Daniel V. Samarov, Jeeseong Hwang
The application of hyperspectral imaging requires rigorous characterization of the spatial and spectral imaging domains of the system. We present a microarray printing methodology for the testing of absorption or reflectance microscopy measurements. This

Low-Cost, High-Throughput, Automated Counting of Bacterial Colonies

January 5, 2010
Author(s)
Matthew L. Clarke, Robert L. Burton, A. N. Hill, Maritoni A. Litorja, Moon H. Nahm, Jeeseong Hwang
Research involving bacterial pathogens often requires enumeration of bacteria colonies. Here we present a low-cost, high-throughput colony counting system consisting of colony counting software and a consumer-grade digital camera or document scanner. We