Accession Number : ADA328217

Title :   Matched Image Formation/Digital Processing Systems.

Descriptive Note : Final rept. 1 Apr 95-31 Mar 97,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Cathey, W. T. ; Dowski, E. R. ; Bradburn, Sara ; Johnson, Greg

PDF Url : ADA328217

Report Date : 30 MAY 1997

Pagination or Media Count : 10

Abstract : Three design tools for hybrid optical/digital imaging systems have been developed that provide new ways of designing the non-conventional imaging systems that are optimum for extended depth of field/focus, and for passively determining the range to objects in a scene. The first tool developed was a defocus transfer function (DTF) for imaging systems with radially symmetric pupils. The DTF allows one to visualize how the modulation transfer function (MTF) will change with focus. Prior work was valid only for one-dimensional optical systems. The second tool uses a form of a Radon-Wigner distribution to show the impulse response, or point spread function, as the focus changes. The third tool is the use of linear transformation operators to analyze and simulate optical systems. These three tools are proving to be very' powerful in the design of hybrid optical/signal processing systems.

Descriptors :   *IMAGE PROCESSING, *OPTICAL IMAGES, SIGNAL PROCESSING, FOURIER TRANSFORMATION, OPTIMIZATION, TRANSFER FUNCTIONS, AUTOCORRELATION, FOCUSING, OPTICAL PROCESSING.

Subject Categories : Optics
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE