Lockheed Martin Corporation

Steven J Pratt

Robert M Krohn

Glenn L Kehley

Alfred T Rundle

Michael J Riess

Walter S Richter

Peter J Dugan

Scott O Sorber

Max Smirnoff

Patrick Ouellette

Patrick J Ballester

David R Menigoz

James S Howard

Douglas N McMartin

Mark Bullock

Matthew Stafford

Peggi J Eller

Charles Apker

David D Schmidt

James W Tripp

An apparatus for performing calibration of an antenna array having a plurality of antennas including at least a first antenna and a second antenna. The apparatus includes a global navigation satellite system receiver configured to measure a first phase of a first signal received by the first antenna from a satellite and a second phase of a second signal received by the second antenna from the satellite. The apparatus also includes at least one processor configured to receive the first phase and the second phase from the global navigation satellite system receiver and to operate in a calibration mode to determine a difference between the first and second phases.

Antenna array calibration

A system in accordance with the present invention protects information. The system includes a processor for processing information and a state machine utilizing tables for determining protection requirements for the information.

System for protecting information

A system and method for achieving constant magnification of a scanned three-dimensional item without the use of special optics or other specialized hardware. The system includes the dynamic computation of a camera parameter-dependent factor and applying that factor in real-time to the sampled signal resulting from the scan of the item.

Constant magnification imaging method and system

An apparatus processes a video image. The apparatus includes an imaging device, a frame grabber device, and a host computer. The imaging device () produces a gray level image representing the video image. The frame grabber device conducts preprocessing functions on the gray level image and produces a plurality of image types from the gray level image. The host computer has a memory for storing the plurality of image types. The plurality of image types are transferred directly from the frame grabber device to the memory of the host computer.

Reconfigurable, multi-output frame grabber for machine vision applications

A new and improved line scan camera achieves the proper framing of the image field of view by using a first test card to calibrate the true bottom and leading edge portions of the test card which simulate the true bottom and leading portions of an article being scanned or photographed. Still further, the architecture of the electronic chip incorporated within the charge coupled device (CCD) of the camera effectively divides the linear array of pixels into a plurality of channels, and amplifier gain and black offset adjustments are made with respect to exposure levels, characteristic of the pixels disposed at the channel boundaries, under different degrees of input whiteness signals applied to a test card of a predetermined color shade, so as to achieve channel-to-channel seam matching. Subsequently, correction factors are effectively superimposed upon substantially all of the exposure levels characteristic of substantially all of the pixels comprising the line scan of the line scan camera such that true uniform exposure levels are in fact achieved.

Automatic calibration and built-in diagnostic procedures for line scan cameras

Methods and systems for calibrating and aligning Time Delay Integration (TDI) Charge Coupled Device (CCD) sensors. A TDI sensor for linear imaging (line sensor) is calibrated by generating a two dimensional image from the line sensor, analyzing the two dimensional image, and calibrating the line sensor based on the analysis. An alignment correction can then be generated, the correction applied to the line sensor placement and the line sensor re-tested. A calibration system includes means for generating a two dimensional image from the TDI line sensor, means for analyzing the two dimensional image, and means for calibrating the line sensor based on the analysis of the two dimensional image.

Method and system for calibration of time delay integration imaging devices

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Endwell, NY, United States of America

Steven J Pratt