Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and system for forming image by backprojection










Image Number 5 for United States Patent #5805098.

The method and system quickly and simultaneously generate multi-resolution and high-resolution imagery from projection data obtained, e.g., through synthetic aperture radar, magnetic resonance imaging, x-ray CAT scans, seismic imaging, sonar imaging, and acoustic imaging. The backprojector technique is modified by a quadtree decomposition of the image area. The sensor elements are grouped into subapertures, and an image is formed in each subaperture by backprojection. The subapertures are grouped into larger subapertures and an image is formed in each of the larger subapertures by backprojection. This operation is repeated until a single large subaperture is defined which covers the entire antenna array. In this way, common additions are factored, computed once and reused many times. A set of N projections can produce an N.times.N image through O(N.sup.2 log N) operations.








 
 
  Recently Added Patents
Airbag apparatus for a front passenger's seat
High availability conferencing
Programming a universal remote control via direct interaction
Emergency display for emergency personnel
Aggregating data from a work queue
System and method of implementing a concurrency profiler
IIR filter for reducing the complexity of multiplying elements
  Randomly Featured Patents
Engine room for construction equipment
RFID tag dynamically adjusting clock frequency
Optical module
Video control circuit
Compound and color filter
Iron-type golf club head
Two stroke internal combustion engine having an intake piston adjacent each power piston
Lotto ticket scratch-off instrument with bristle end
Catching device
Metrology systems and methods for lithography processes