Image & signal processing

News and Updates

Four sets of black, chunky circular shapes with center markings on a white background.

Recovering Data: NIST’s Neural Network Model Finds Small Objects in Dense Images

August 4, 2020

In efforts to automatically capture important data from scientific papers, computer scientists at the National Institute of Standards and Technology (NIST) have

Detecting Effects of 3D Shapes in Nanoscale Chip Features

April 27, 2015

As microchip feature dimensions approach atomic scale, it becomes formidably difficult to measure their size and shape. According to the International

NIST Effort Could Improve High-Tech Medical Scanners

June 12, 2012

A powerful color-based imaging technique is making the jump from remote sensing to the operating room—and a team of scientists* at the National Institute of

Projects and Programs

Optical and Optoelectronic Materials Characterization

This project aims to develop rigorous measurements and methodology needed for determining optical and electrical properties of advanced materials that might be

Computational Science in Bio-metrology

Computational Science in Biological Metrology (CS in Bio Metrology) project is about Computational Science and Biology Delivering Measurements with Statistical

Sub-nanoscale electron microscopy of complex nanostructures

The aim of this project is to develop robust, quantitative measurement methods utilizing transmission electron microscopy methods for complex, nanostructured

Metrology for Real-Time Monitoring of Additive Manufacturing

Part quality in additive manufacturing (AM) is highly variable due to inadequate dimensional tolerances, surface roughness, and defects, thereby limiting its

Publications

X-Ray Computed Tomography using Partially Coherent Fresnel Diffraction with Application to an Optical Fiber

January 18, 2021

Author(s)

Zachary H. Levine, Edward Garboczi, Adele Peskin, Axel A. Ekman, Elisabeth Mansfield, Jason Holm

An algorithm for partially coherent x-ray computed tomography including Fresnel diffraction is developed and applied to an optical fiber. The computing time is

CAMERA-BASED COAXIAL MELT POOL MONITORING DATA REGISTRATION FOR LASER POWDER BED FUSION ADDITIVE MANUFACTURING

November 16, 2020

Author(s)

Yan Lu, Zhuo Yang, Ho Yeung, Jaehyuk Kim, Hyunbo Cho

The quality of powder bed fusion (PBF) built parts is highly correlated to the melt pool characteristics. Camera-based coaxial melt pool monitoring (MPM) is

Analysis and Uncertainty Quantification of DNA Fluorescence Melt Data: Applications of Affine Transformations

October 15, 2020

Author(s)

Paul N. Patrone, Anthony J. Kearsley, Jacob M. Majikes, James A. Liddle

Digital Radiometer for Traceable Spectrum Sensing

September 14, 2020

Author(s)

Xifeng Lu, Dazhen Gu, Daniel G. Kuester

This paper describes a metrology instrument designed for detecting noise and interference in digital communications. A quadrature detector downconverts in-phase

Software

Custom Lifetime Imaging Platform (CLIP)

CLIP is an analysis program for fluorescence lifetime images. It provides the user with the ability to fit or calculate the phasor plots for lifetime decays

Tools and Instruments

Large Aperture Scanner

The Large Aperture Scanner (LAS) scans a radar transceiver over a 5 meter by 20 meter aperture. Image reconstruction techniques enable a three-dimensional