Edward James Dragavon

age ~77

from Los Angeles, CA

Also known as:
  • Edward J Dragavon
Phone and address:
8307 Creighton Ave, Los Angeles, CA 90045

Edward Dragavon Phones & Addresses

  • 8307 Creighton Ave, Los Angeles, CA 90045
  • Vail, CO
Name / Title
Company / Classification
Phones & Addresses
Edward Dragavon
Owner
Novagarde LLC
Aerospace and Defence Consulting Technical Svcs
595 Vail Vly Dr, Vail, CO 81657
3109937711

Us Patents

  • Histogram Equalization System For Display Improvement

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  • US Patent:
    39795551, Sep 7, 1976
  • Filed:
    May 27, 1975
  • Appl. No.:
    5/582478
  • Inventors:
    Eugene W. Opittek - Santa Ana CA
    David J. Ketcham - Lakewood CA
    Edward J. Dragavon - Los Angeles CA
  • Assignee:
    Hughes Aircraft Company - Culver City CA
  • International Classification:
    H04N 300
  • US Classification:
    178 68
  • Abstract:
    A histogram equalization system that adaptively redistributes the intensity coding of the video in order to provide an equal number of elements at all display intensity levels. The actual amplitude value of the input video as stored in an integrator, for example, is utilized to address a random access memory which originally is loaded with all zeros. The memory is organized such that there are as many addressable words as there are possible video intensity values carried in the integrator thereby building up a histogram within the memory. Upon completion of the histogram, a constant equal to the number of picture elements corresponding to the data used to form the histogram divided by the number of values to which it is desired to truncate, is utilized in a comparator as the histogram memory is sequentially read out and accumulated to determine the truncation points. A latching circuit is filled with the truncation point values and these points are used in a truncation logic circuit responding to the input video signal to reduce the number of video bits. The truncated signal increases the sensitivity to localized signal variations of a scene so as to increase the detail of the gray scale region requiring additional intensity codes.
  • Resolution Enhancement And Zoom By Degradation Estimates

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  • US Patent:
    45175993, May 14, 1985
  • Filed:
    Jan 27, 1983
  • Appl. No.:
    6/461354
  • Inventors:
    Robert Zwirn - Los Angeles CA
    Edward J. Dragavon - Los Angeles CA
    Brian Smithgall - Hermosa Beach CA
  • Assignee:
    Hughes Aircraft Company - El Segundo CA
  • International Classification:
    H04N 514
  • US Classification:
    358166
  • Abstract:
    In this invention, the resolution is enhanced by first effectively decreasing the scan angle subtended between adjacent samples significantly below that of the Rayleigh limit to obtain an image blurred by the point spread function (or diffraction pattern) of the aperture. The next step is to process this blurred image to at least partially remove the blur. The unblurring process consists of convolving this finely sampled blurred image with a specially designed convolution mask. This mask effectively outputs an enhanced pixel at each step of the convolution. The mask simultaneously performs the equivalent of the following operations: (1) blur the image again; (2) subtract this reblurred image from the original image to form degradation estimates; and (3) add the estimates of the losses back into the original image.

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