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
Combination therapy to enhance NK cell mediated cytotoxicity
Flood protection apparatus and container data center including the same
Consistent retention and disposition of managed content and associated metadata
Method of manufacturing semiconductor device and semiconductor device
Reliability fire pressure switch
Systems and methods for sensing external magnetic fields in implantable medical devices
Managing and collaborating with digital content
  Randomly Featured Patents
Wheel bearing unit for rotatably supporting a driveable wheel on a wheel carrier
Cutting elements for rotary drill bits
Quick change power tool chuck
Method for testing plurality of system-in-package devices using plurality of test circuits
Method and apparatus for altering the properties in light absorbing material
Arrangement for mounting seat sliding device on vehicle floor
Liquid crystal display with the red, green, blue, and yellow sub-pixels surrounding the white sub-pixel
Winding and adjustment watch's crown
Liquid-cooled, flat plate heat exchanger
Two-sided optical recording medium