Accession Number : ADA290799

Title :   Unconventional Image Recovery Techniques.

Descriptive Note : Final rept. 1 Aug 92-31 Jul 94,

Corporate Author : RGB ASSOCIATES INC WAYLAND MA

Personal Author(s) : Barakat, Richard

PDF Url : ADA290799

Report Date : 20 SEP 1994

Pagination or Media Count : 34

Abstract : The main theme of this contract is the development of unconventional imaging techniques. The imaging methods advocated result in complicated nonlinear relations between the object and its image, inversion techniques are required to translate the measured data into a meaningful estimate of the object. Although these methods require a large amount of computation, they are relatively cheap compared to the costs of large aperture optical systems. The technical approach is two-fold: first development of the theory of the unconventional imaging scenario in question; second adaption of the latest techniques from numerical analysis to carry out the inversion from measured data to reconstructed object. One problem was completed and written up for publication: Inversion of the modulus and phase of a coherently illuminated object from its measured diffraction image. This constitutes the main body of the report along with representative numerical calculations. The inversion techniques developed here should be of great use in various biomedical imaging techniques and could result in replacing phase contract microscopy. (MM)

Descriptors :   *IMAGE PROCESSING, *OPTICAL IMAGES, MATHEMATICAL MODELS, ALGORITHMS, ILLUMINATION, NONLINEAR OPTICS, MICROSCOPY, DIFFRACTION, STRATEGIC DEFENSE INITIATIVE.

Subject Categories : Optical Detection and Detectors
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE