Rough wavelet granular space and classification of multispectral remote sensing image
First Claim
Patent Images
1. A method to perform rough-wavelet based analysis of spatio-temporal patterns, the method comprising:
- generating a wavelet granulated space of features associated with a multispectral image, wherein the wavelet granulated space constitutes 4n granules in an n-dimension feature space for a one-level discrete wavelet transform (DWT) decomposition and 7n granules in the n-dimension feature space for a two-level DWT decomposition;
selecting features based on a rough set evaluation;
removing redundant features;
in response to removal of at least one of the redundant features, determining a measure of significance of the features by an evaluation of a change in data dependency of the features, wherein a greater change in data dependency indicates a greater measure of the significance;
classifying the spatio-temporal patterns based on the selected features; and
locating and selecting a subset of granulated features based on the significance.
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Abstract
Shift-invariant wavelet transform with properly selected wavelet base and decomposition level(s), is used to characterize rough-wavelet granules producing wavelet granulation of a feature space for a multispectral image such as a remote sensing image. Through the use of the granulated feature space contextual information in time and/or frequency domains are analyzed individually or in combination. Neighborhood rough sets (NRS) are employed in the selection of a subset of granulated features that further explore the local and/or contextual information from neighbor granules.
21 Citations
19 Claims
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1. A method to perform rough-wavelet based analysis of spatio-temporal patterns, the method comprising:
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generating a wavelet granulated space of features associated with a multispectral image, wherein the wavelet granulated space constitutes 4n granules in an n-dimension feature space for a one-level discrete wavelet transform (DWT) decomposition and 7n granules in the n-dimension feature space for a two-level DWT decomposition; selecting features based on a rough set evaluation; removing redundant features; in response to removal of at least one of the redundant features, determining a measure of significance of the features by an evaluation of a change in data dependency of the features, wherein a greater change in data dependency indicates a greater measure of the significance; classifying the spatio-temporal patterns based on the selected features; and locating and selecting a subset of granulated features based on the significance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus to perform rough-wavelet based analysis of spatio-temporal patterns, comprising:
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a memory configured to store instructions and data associated with an input pattern vector of a multispectral image; a processor coupled to the memory, wherein the processor is adapted to execute the instructions, which when executed configure the processor to; generate a wavelet granulated space of features associated with the multispectral image, wherein the wavelet granulated space constitutes 4n granules in an n-dimension feature space for a one-level discrete wavelet transform (DWT) decomposition and 7n granules in the n-dimension feature space for a two-level DWT decomposition; select features based on a rough set evaluation; remove redundant features; and classify the patterns based on the selected features. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium having instructions stored thereon to perform rough-wavelet based analysis of spatio-temporal patterns, the instructions comprising:
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generating a wavelet granulated space of features associated with a multispectral image, wherein the wavelet granulated space constitutes 4n granules in an n-dimension feature space for a one-level discrete wavelet transform (DWT) decomposition and 7n granules in the n-dimension feature space for a two-level DWT decomposition; selecting features based on a rough set evaluation; removing redundant features; and classifying the patterns based on the selected features. - View Dependent Claims (17, 18, 19)
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Specification