USA As Represented by Secretary of the Navy

Brian T Williams

David L Buck

Gregory Knowles Fleizach

Heidi L Buck

Barry R Hunt

Matthew Joseph Nicholson

Elan Sharghi

Alan Fronk

Matthew Fong

Peter C Grossnickle

A method may include the steps of segmenting an image into a plurality of tiles, calculating an upper clip limit and a lower clip limit for each tile of the plurality of tiles based upon a user input standard deviation, generating a lookup table for each tile of the plurality of tiles by linearly mapping the pixels of the image based upon the calculated upper clip limit and lower clip limit, processing each tile of the plurality of tiles based upon the generated lookup table, and generating a processed image by combining each of the processed tiles. The method may include the steps of scaling the image between zero and one and/or scaling the image based upon the display type. The method may be stored on a computer readable medium and may be used in an image processing system having memory, a processor, and a display.

Adaptive linear contrast method for enhancement of low-visibility imagery

A method includes the steps of selecting an image filtering technique, receiving an image from an image source, processing the received image to provide a processed image, and displaying the processed image to a user. Processing the received image includes the steps of adjusting the received image to provide an adjusted image, filtering the adjusted image according to the selected image filtering technique to provide a filtered image, and adjusting the filtered image. The image filtering technique may be selected from histogram equalization, band-pass filtering, adaptive enhancement filtering, or other techniques. The method may be used in an image processing system having memory, a processor, and a display.

System and method for enhancing low-visibility imagery

A system and process for the geo-location of an asset given no a priori knowledge regarding time and location of the asset with minimized power consumption is disclosed. In the preferred embodiment, the system is accurate to about 30 meters CEP (50% circular error probable) using just a short segment, e.g., 100-200 ms, of digitized GPS L1 signal data.

System and method for geo-locating a receiver with reduced power consumption

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San Diego, CA, United States of America

Brian T Williams