Digital camera for image device calibration
AssigneeHewlett-Packard Development Company, L.P.
InventorD. Amnon Silverstein
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Abstract
The invention is directed to an apparatus for calibrating an output of an image output device, comprising an image input device configured to image an output of the image output device; and a test pattern generator having an output of a dynamic test patch area and a grating area connected to an input of the image output device and responsive to the image input device for adjusting an intensity level of the dynamic test patch area to match an average intensity level of the grating area.
Claims22
An apparatus for calibrating an output of an image output device, comprising:
- an image input device configured to image an output of said image output device;
- and
- a test pattern generator having an output of a dynamic test patch area and a grating area connected to an input of said image output device and responsive to said image input device for adjusting an intensity level of said dynamic test patch area to match an average intensity level of said grating area.
A method of calibrating an output of an image output device, comprising the steps of:
- generating a test pattern including a grating area and a dynamic test patch area;
- setting a configuration of pixels within said grating area to first and second predetermined pixel levels;
- adjusting a value of pixels within said dynamic test patch area to match an intensity level of said dynamic test patch area to an average intensity level of said grating area.
An apparatus for calibrating an output of an image output device, comprising:
- detector means for image the output of the image output device;
- and
- test pattern generator means for providing a test pattern to said image output device, the test pattern including dynamic test patch, grating and fixed level areas, said test pattern generator means responsive to said detector means for adjusting an intensity level of said dynamic test patch area to match an average intensity level of said grating area.
Dependencies are inferred from the claim text.