Resources Contact Us Home
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
Integrated testing circuitry for high-frequency receiver integrated circuits
Method and devices for handling access privileges
System and method for advertising messages on distributed document processing devices
Closed cell culture system
Resin composition, prepreg, resin sheet, metal-clad laminate, printed wiring board, multilayer printed wiring board and semiconductor device
Rewriting branch instructions using branch stubs
  Randomly Featured Patents
Methods of making a guitar pick holder comprising a flexible magnetic material
Process and plant for the production of urea with high conversion yield and low energy consumption
Method of making isotropic bonded magnet
Multiple outlet locking receptacle
Drapery weight and method
Folder with multiple-motor drive
Apparatus for testing the ability of a filter to filter contaminants
Lock drilling template