Resources Contact Us Home
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
Light barrier and method for detecting objects
Device and process for isolating and cultivating live cells on a filter or extracting their genetic material
Manufacturing aircraft parts
Mitigating single point failure of devices in an analyte monitoring system and methods thereof
Specializing disambiguation of a natural language expression
Method of measuring a displacement amount for an automobile suspension assembly
  Randomly Featured Patents
Scalability related to controller engine instances
Antiseptic composition
Data access using a machine-readable card
Motor starting switch
Automobile storage bag
Clamp mechanism and workpiece end cutting apparatus utilizing same
Image forming apparatus and storing medium
Substituted 2-amino-4-alkylamino-1,3,5-triazines as herbicides
Tube alignment bracket
Semiconductor memory device