Northrop Grumman Systems Corporation

Martin Marietta Corporation

Prc Inc.

Thomas S Heath

John P Kuhn

The present invention is directed to a system and method for building a video mosaic from a sequence of video images. Advantageously, the present invention can quickly and easily align each image by performing an image registration. The image registration includes detecting edges of structures and determining regions of interest. Once regions of interest are determined, then the distance from the center of the video image to the region of interest can be determined and from that determined data, the video images can be aligned.

Video mosaic

Disclosed is a computer-implemented method of enhancing a video image. A sequence of video frames is extracted. Each of the video frames is upsampled. The upsampled video frames are interpolated. The interpolated video frames are aligned and a single image is created from the aligned video frames.

Image enhancement

The invention discloses an apparatus for and a method of adaptively processing a sonar power spectrum for improving the display of narrowband line structure characteristic of a target in a background of broadband interference which is rippled due to multipath propagation arrival structure. The processor employs a first Fourier transformer to convert the sonar frequency data into a complex correlation format. The autocorrelation is then time difference sampled to separate the broadband ripple interference from the broadband trend interference. The separate time difference samples are then transformed back to their real frequency format to form a broadband ripple estimate and a broadband trend estimate of the interference background. The ripple estimate is subtracted from the sonar signal to remove the ripple component and the resulting difference is normalized by a division by the interference trend estimate. The result is improved detectability of the narrowband lines in the presence of widely varying multipath interference.

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Syracuse, NY, United States of America

Thomas S Heath