Shutterless calibration
AssigneeN2 Imaging Systems, LLC
InventorsMartin Vaklev, Francis M. Vu, Scott Richman
Life of this patent
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Abstract
An imaging system includes a focal plane array including an array of pixels. An isothermal diaphragm covers a first portion of the pixels along a periphery of the array and exposing an imaging portion of the pixels. A controller is operatively connected to the focal plane array to read sensor data from the focal plane array, wherein the sensor data includes image data from the imaging portion of the pixels and non-uniformity data from the first portion of the pixels. The controller is operatively connected to the focal plane array to enhance the image data based on the non-uniformity data.
Claims15
An imaging system comprising:
- a focal plane array including an array of pixels;
- an isothermal diaphragm covering a first portion of the pixels along a periphery of the array and exposing an imaging portion of the pixels, and
- a controller operatively connected to the focal plane array to read sensor data from the focal plane array, wherein the sensor data includes image data from the imaging portion of the pixels and non-uniformity data from the first portion of the pixels, wherein the controller is operatively connected to the focal plane array to enhance the image data based on the non-uniformity data.
A method of correcting non-uniformity comprising:
- collecting sensor data from a focal plane array that includes an array of pixels, wherein an isothermal diaphragm covers a portion of the pixels along a periphery of the array and exposes an imaging portion of the pixels, wherein the sensor data includes an image portion of the sensor data from the imaging portion of the pixels and non-uniformity data from the portion of the pixels that are covered by the isothermal diaphragm;
- and
- using the non-uniformity data to perform a non-uniformity correction on the image portion of the sensor data.
Dependencies are inferred from the claim text.