Technique to remove sensing artifacts from a linear array sensor
AssigneeXerox Corporation
InventorsHoward A. Mizes, Jack Lestrange, Martin Edward Hoover, Steven R. Moore
Life of this patent
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Abstract
Disclosed is a method and system for calibrating an image capturing sensor. The method and system include generating a test pattern on an image receiving device and measuring one or more colorimetric properties of the test pattern with an image sensor. The disclosed method and system measure the test pattern with the image sensor located in two or more different cross-process positions to determine an independent uniformity profile for the image sensor and the image rendering process.
Claims18
A method of calibrating an image sensor as a function of a pixel index associated with the image sensor comprising:
- generating a test pattern on an image receiving device;
- measuring one or more colorimetric properties associated with the test pattern with an image sensor located at a first position relative to the test pattern to produce a first data set, wherein the image sensor is aligned with a first area of the test pattern associated with a first range of pixel indices;
- measuring the one or more colorimetric properties associated with the test pattern with the image sensor located at a second position relative to the test pattern to produce a second data set, wherein the image sensor is aligned with a second area of the test pattern associated with a second range of pixel indices which partially overlap the first range of pixel indices;
- and
- processing the first data set and second data set to determine the calibration profile of the image sensor as a function of the pixel indices, wherein the first and second areas of the test pattern include a common area of the test pattern associated with the partial overlap of the first and second range of pixels.
An image output system comprising:
- an image output device;
- an image output sensor;
- and
- an image output controller operatively connected to the image output device and image output sensor, the image controller output system configured to perform a method of calibrating the image output sensor as a function of a pixel index associated with the image output sensor, the method comprising:
- measuring one or more calorimetric properties associated with a test pattern with the image output sensor at a first location relative to the test pattern and producing a first data set, wherein the image sensor is aligned with a first area of the test pattern associated with a first range of pixel indices;
- measuring one or more colorimetric properties associated with the test pattern with the image sensor located at a second location relative to the test pattern and producing a second data set, wherein the image sensor is aligned with a second area of the test pattern associated with a second range of pixel indices which partially overlap the first range of pixel indices;
- and
- processing the first data set and second data set to determine the calibration profile of the image sensor as a function of the pixel indices, wherein the first and second areas of the test pattern include a common area of the test pattern associated with the partial overlap of the first and second range of pixels.
Dependencies are inferred from the claim text.