Now showing items 1-10 of 11
An Algorithm for Extraction of More than One Optimal Linear Feature from Several Gaussian Pattern Classes
Two algorithms have been developed at Rice University for optimal linear feature extraction based on the minimization risk (probability) of misclassification under the assumption that the class conditional probability ...
Design of Optimal Feature Extractors by Mathematical Programming Techniques
In an automatic pattern recognition system, the processor that selects and measures features fo the data, on the basis of which classification is made, is called a "feature selector" or "feature extractor". This paper ...
Feature Extraction Techniques for Classification and Identification of Spectral Signatures
Some of the results obtained at Rice University on the extraction of features from spectral signatures for the purpose of classifying and identifying these signatures are described.
A Tri-State Delta Modulator for Run-Length Encoding of Video
Tri-state delta modulation (TSDM) is introduced as an extension of two-state adaptive delta modulation. Its advantages for picture transmission are discussed as well as its implementaiton. Statistics from computer ...
Nonlinear Dynamic Theory for Photorefractive Phase Hologram Formation
A nonlinar dynamic theory is developed for the formation of photorefractive volume phase holograms. A feedback mechanism existing between the photo-generated field and free electron density, treated explicitly yields the ...
Some Distance Measures and Their Use in Feature Selection
The Bhattacharyya, I-divergence, Vasershtein, variational and Levy distances are evaluated, compared and used for the reduction of n data to one feature. This reduction is obtained through a restricted linear transformation ...
Study of the Equivalent Electron Drift Field Characteristics in LiNb0<sub>3</sub> by Phase Holography
An analysis of the diffraction efficiency of photorefractive holograms in ferroelectric crystals is shown to provide a novel technique for determining the nature and magnitude of the equivalent electron drift field. For ...