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
Semiconductor device having trapezoidal shaped trenches
Assigning runtime artifacts to software components
Recording device, recording method, and program
Image forming apparatus with static elimination
System and method for deriving cell global identity information
Electronic time stamping apparatus for use with an inground transmitter
Antenna array system
  Randomly Featured Patents
2-Amino-4,5-dihydro-1H-imizole-1-carboxanilides
Coated cutting tool and method for producing the same
Histamine H.sub.3 receptor ligands
Connector for catheter
Encoded signal device with self-contained clock generation
Base for a telephone handset
Grinding holder in a machining device
Apparatus, system, and method for measuring light-weight purchase items
Method for the degradation of MTBE and TBA
Method for monitoring and adjusting the position of an object under optical observation for imaging