Resources Contact Us Home
Efficient imagery exploitation employing wavelet-based feature indices

Image Number 5 for United States Patent #7805005.

A wavelet-based band difference-sum ratio method reduces the computation cost of classification and feature extraction (identification) tasks. A Generalized Difference Feature Index (GDFI), computed using wavelets such as Daubechies wavelets, is employed in a method to automatically generate a large sequence of generalized band ratio images. In select embodiments of the present invention, judicious data mining of the large set of GDFI bands produces a small subset of GDFI bands suitable to identify specific Terrain Category/Classification (TERCAT) features. Other wavelets, such as Vaidyanathan, Coiflet, Beylkin, and Symmlet and the like may be employed in select embodiments. The classification and feature extraction (identification) performance of the band ratio method of the present invention is comparable to that obtained with the same or similar data sets using much more sophisticated methods such as discriminants, neural net classification, endmember Gibbs-based partitioning, and genetic algorithms.

  Recently Added Patents
Surface-emitting laser array, optical scanning device, and image forming device
Signal light monitoring apparatus, optical amplification apparatus and optical reception apparatus, and signal light monitoring method
Method and system for synchronizing the phase of a plurality of divider circuits in a local-oscillator signal path
Motion deblurring for text images
Method for improving uniformity of high-frequency plasma discharge by means of frequency modulation
Trick mode on bidirectional predictive frames
Combination products
  Randomly Featured Patents
Method of manufacturing an illuminating reflection mirror
Freight railroad car reflector
Set top box
Pyridine, quinoline, and isoquinoline N-oxides as kinase inhibitors
Optical fiber plug
Method and apparatus for stopping an elevator
Method for adsorbing and separating heavy metal elements by using a tannin adsorbent and method of regenerating the adsorbent
Stable red beet color composition
cBN semiconductor device having an ohmic electrode and a method of making the same