Now showing items 1-6 of 6

  • Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography 

    Dorney, Timothy D.; Bhashyam, Srikrishna; Doran, Andrew; Choi, Hyeokho; Flandrin, Patrick; Baraniuk, Richard G. (2000-07-01)
    Traditional filtering methods operate on the entire signal or image. In some applications, however, errors are concentrated in specific regions or features. A prime example is images generated using computed tomography. ...
  • Imaging with Terahertz Pulses 

    Dorney, Timothy D.; Johnson, Jon L.; Mittleman, Daniel M.; Baraniuk, Richard G. (2000-07-01)
    Recently, a real-time imaging system based on terahertz (THz) time-domain spectroscopy has been developed. This technique offers a range of unique imaging modalities due to the broad bandwidth, sub-picosecond duration, and ...
  • Imaging with THz Pulses 

    Dorney, Timothy D.; Johnson, Jon L.; Mittleman, Daniel M.; Baraniuk, Richard G. (2000-09-01)
    A real-time imaging system based on terahertz (THz) time-domain spectroscopy has been demonstrated. This technique offers a range of unique imaging modalities due to the broad bandwidth, sub-picosecond duration, and ...
  • Spectroscopic Imaging using Terahertz Time-Domain Signals 

    Dorney, Timothy D.; Baraniuk, Richard G.; Mittleman, Daniel M. (2000-04-01)
    Imaging systems based on terahertz time-domain spectroscopy offer a range of unique modalities due to the broad bandwidth, sub-picosecond duration, and phase-sensitive detection of the terahertz pulses. Furthermore, an ...
  • Terahertz Multistatic Reflection Imaging 

    Dorney, Timothy D.; Symes, William; Baraniuk, Richard G.; Mittleman, Daniel M. (2002-07-01)
    We describe a new imaging method using single-cycle pulses of terahertz (THz) radiation. This technique emulates the data collection and image processing procedures developed for geophysical prospecting and is made possible ...
  • Terahertz Reflection Imaging using Kirchhoff Migration 

    Dorney, Timothy D.; Johnson, Jon L.; Rudd, J. Van; Baraniuk, Richard G.; Symes, William; Mittleman, Daniel M. (2001-10-01)
    We describe a new imaging method that uses single-cycle pulses of terahertz (THz) radiation. This technique emulates data-collection and image-processing procedures developed for geophysical prospecting and is made possible ...