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Related Experiment Video

Updated: May 29, 2026

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

Published on: April 4, 2017

Scene-based nonuniformity compensation for imaging sensors.

¹Systems and Research Center, Honeywell, Inc., Minneapolis, MN 55413.

IEEE Transactions on Pattern Analysis and Machine Intelligence

|August 27, 2011

Summary

This summary is machine-generated.

This study introduces a novel real-time calibration technique for imaging arrays, eliminating the need for shutters and temperature references. The method uses scene statistics for accurate offset and responsivity compensation in focal plane arrays.

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Area of Science:

Sensor Technology
Image Processing
Optical Engineering

Background:

Multidetector imaging focal plane arrays (e.g., CCD TV cameras, infrared arrays) suffer from significant detector-to-detector variations in dark current (offset) and responsivity (gain).
These variations can obscure valuable image information, necessitating calibration.
Conventional calibration methods rely on temperature references and mechanical/electrooptical shutters, complicating the design of staring focal planes.

Purpose of the Study:

To develop a real-time offset and responsivity compensation technique for staring focal planes.
To eliminate the need for external temperature references and shutters in calibration.
To enable continuous, non-interruptive calibration using scene statistics.

Main Methods:

A novel real-time calibration technique utilizing scene statistics to determine offset and responsivity compensation coefficients.
Continuous updating of compensation coefficients without interrupting the field of view.
Simulation of the technique with various sensors and exploration of LSI/VLSI hardware architectures.

Main Results:

Demonstrated effective real-time offset and responsivity compensation using scene statistics.
Validated the technique through simulations across multiple sensor types.
Showcased the feasibility of implementation with minimal additional hardware compared to conventional methods.

Conclusions:

The developed technique offers a simplified, shutterless, and temperature-reference-free calibration solution for staring focal planes.
The method is adaptable for multi-detector scanning focal planes and TV sensor shading removal.
This approach enhances the mechanical simplicity and operational efficiency of imaging systems.