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
Method for exchanging data concerning an electronic transaction
Cable exit trough with insert
Lighting apparatus
Detachably integrated battery charger for mobile cell phones and like devices
Storage basket with lid
Semiconductor arrangement with a solder resist layer
Content protection apparatus and content encryption and decryption apparatus using white-box encryption table
  Randomly Featured Patents
Multi-disc brake system
Southern highbush blueberry plant named `FL05-107`
Anode for magnetic sputtering apparatus
Concrete slab structure for railway track
Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides
Bottom-load video cassette container
Holding gripper and holding method for semiconductor wafer and shape measuring apparatus
Vitamin D3 derivative and treating agent for inflammatory respiratory disease using same
Safety device for use with a cannula