Calibration target for image sensor
AssigneeNorthrop Grumman Systems Corporation
InventorPatricia D. Pratt
Life of this patent
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Abstract
A calibration target for an image sensor can include a panel with a predetermined length and width. The calibration target can also include an optical fabric overlaying a surface of the panel that generates light on a predetermined spectral band corresponding to a spectral band detectable by the image sensor spaced apart from the calibration target by a predetermined distance. The generated light can have sufficient luminance to penetrate a predetermined depth of water and to saturate at least one pixel of the image sensor.
Claims19
A calibration target for an image sensor comprising:
- a panel with a predetermined length and width;
- and
- an optical fabric overlaying a surface of the panel that generates light on a predetermined spectral band corresponding to a spectral band detectable by the image sensor spaced apart from the calibration target by a predetermined distance;
- wherein the generated light has sufficient luminance to penetrate a predetermined depth of water and to saturate at least one pixel of the image sensor, wherein the optical fabric receives light injected in a given color in a given direction and light injected in another color in another direction, wherein the image sensor observes an aggregate of the given color and the other color.
A system for calibrating an image sensor comprising:
- a floatation device;
- and
- a calibration target affixed to the floatation device, the calibration target comprising:
- a plurality of panels arranged to provide a predetermined length and a predetermined width of the calibration target;
- and
- a plurality of sheets of optical fabric, wherein each of the plurality of sheets of optical fabric overlays a corresponding one of the plurality of panels, and each of the plurality of sheets of optical fabric generates light on a predetermined spectral band corresponding to a spectral band detectable by the image sensor spaced apart from the calibration target by a predetermined distance;
- wherein the light generated by the plurality of sheets of optical fabric has an aggregate sufficient luminance to penetrate a predetermined depth of water and to saturate at least one pixel of the image sensor, and wherein each sheet of optical fabric receives light injected in a given color in a given direction and light injected in another color in another direction, wherein the image sensor observes an aggregate of the given color and the other color.
A calibration target for an image sensor comprising:
- a plurality of sheets of fiber optic fabric that each generate light to provide light on a spectral band detectable by the image sensor;
- wherein the generated light has sufficient luminance to penetrate one meter of water and to saturate at least one pixel of the image sensor;
- wherein each sheet of fiber optic fabric receives light injected in a given color in a given direction and light injected in another color in another direction, wherein the image sensor observes an aggregate of the given color and the other color.
Dependencies are inferred from the claim text.