Raytheon Company

L-3 Communications Corporation

Raytheon Ti Systems, Inc.

Mark A Gohlke

Humphrey Wing-Hong Ha

Charles M Hanson

Robert A Owen

James Robarge

Steven C Palomino

Steven P Jenkins

Christopher J Baker

Luan B Do

Trent A Jacobs

Keith R Kuemmerle

Mark G Webb

Steven Palomino

Vicki D Paul

Patrick J Sigler

Roger C Knott

Gary R Herrington

Richard D Tinkler

Lawrence E Savage, Ii

Michael R Thering

Lawrence E Ii Savage

A system includes a plurality of actuators configured to provide forces to an actuatable member to actuate the member between a first position and a second position during an actuation mode. The actuators are also configured to return the member from the second position to the first position during a retrace mode. The system also includes a controller configured to control the actuators. The controller is configured to identify a back electromotive force (BEMF) of each of the actuators during the retrace mode. The controller is also configured to responsively provide control signals to drive the actuators such that the forces provided by the actuators to the member during the actuation mode are substantially equal.

Linear actuator force matching using back EMF

A system and method for interpolating between pixels of an image for providing zoom and pan features. A piecewise cubic spline is used to find the values of each of four provisional interpolation points in each of four rows of an image and, similarly, a piecewise cubic spline is used to interpolate between the provisional interpolation points to find the value of a point in the output image. Boundary conditions used to constrain the coefficients of the piecewise cubic spline provide enhanced quality in the output image.

Method for electronic zoom with sub-pixel offset

Collecting samples to adjust a signal includes providing a shutter in an opened position to allow a detector of an infrared camera to detect infrared radiation and generate a signal corresponding to the infrared radiation. A first touchup iteration is initiated by moving the shutter to a closed position, and samples of a reference frame are collected according to a collection instruction. The shutter is then moved to the opened position. If there is a change in a state of the infrared camera, the collection instruction is adjusted in response to the change. A second touchup iteration is initiated by moving the shutter to the closed position, and samples are collected according to the adjusted collection instruction. A modification of the signal is determined in accordance with at least some of the samples.

Adaptively reducing offset in a thermal imaging camera

A method of image processing and the image processor which includes providing a convolution operator having an input for receiving raw imaging data at a data rate N and a plurality of output paths M. The convolution operator provides a time (phase) delay T to the imaging data between the input and the output paths and applies the imaging data on a time delayed basis to the output paths in phased relation to their time of application to the convolution operator. The convolution operator provides a low pass filtering operation to the data to provide background information. A phase equalization circuit is provided having an input for receiving the raw imaging data at the data rate N and M output paths, one path corresponding to each output path of the convolution operator, to provide a time delay to the raw imaging data at each output path of the phase equalization circuit equal to the time (phase) delay T of the convolution operator. The background information from the convolution operator is subtracted from the raw image data from the phase equalization circuit to provide feature information. A combination of background information and the feature information is then provided. The low pass filtering operation includes providing a one or two dimensional decimation to the data and providing a one or two dimensional interpolation of the decimated data.

System and method for local area image processing

A scanner which includes a motor for driving a load and circuitry for providing a position error signal responsive to the difference between a predicted position of the load and the actual position of the load, preferably a mirror scanning a scene. The motor is driven in response to the position error signal. The position error signal is provided plural times during a single scanning of the scene. The circuitry for providing a position error signal includes a closed loop filter system for filtering the error signal to provide a filtered error signal, an adaptive filter system for operating on the filtered error signal to provide an adaptively filtered error signal and summing circuitry for summing signals indicative of the predicted position, the filtered error signal and the adaptively filtered error signal. The closed loop filter system includes, in series, at least one first order lead lag filter and a double integral plus proportional filter. The adaptive filter system includes, in series, a low pass filter, a register and an integrator.

Infrared scanner

Growing community of inventors

Plano, TX, United States of America

Mark A Gohlke