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










Image Number 13 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
Drill bit case
Phosphine-oxide catalyzed process of production of hydrogen from silylated derivatives as hydrogen carrier
Radio access point device location verification based on wireless user device roaming history
Ceramic compositions for improved extrusion
Cable redundancy and failover for multi-lane PCI express IO interconnections
Print preview display of confirmation page with main page based on selected display method
Non-aqueous pigment ink
  Randomly Featured Patents
LED lamp
Operating range selection of an automatic transmission
Processor method of multiplying large numbers
Spring-loaded brake with pressure-medium-operable lifting set
Package
Shaft coupling device and locking mechanism
Circuit system and method of configuring an interface of a control or regulating device
Jack
Scale inhibitors for preventing or reducing calcium phosphate and other scales
Printing of a position-coding pattern