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
Power conversion device and method for controlling thereof
Amplitude-shift-keying (ASK) envelope detector and demodulation circuits
Semiconductor device and method of forming discontinuous ESD protection layers between semiconductor die
Reception circuit and signal reception method
Cosmetic or pharmaceutical peptides containing uncoded amino acids and their use in the treatment and/or care of the skin, mucous membranes, or scalp
Linear transformer power supply
Floor relief for dot improvement
  Randomly Featured Patents
Apparatus for transferring cigarettes or the like from trays into magazines of packing machines or the like
Non-invasive diagnostic imaging technology for mitochondria using radiolabeled lipophilic salts
Method for extra-high speed transformation of time signal into two-dimensional space signal
Canopy
Method of printing a multiple color image using heat sensitive inks
Lubricants and their method of preparation
In situ deposition of a low .kappa. dielectric layer, barrier layer, etch stop, and anti-reflective coating for damascene application
Ball receptor for basketball return machines and the like
Double-faced fluorescent display tube and method of manufacturing the same
Front body structure of automotive vehicle