Method and system for mapping the non-uniformity of an image sensor
AssigneeBarco N.V.
InventorTom Kimpe
Life of this patent
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Abstract
A method for mapping non-uniformities of a portable image sensor having image sensor elements, each image sensor element having a coordinate. The method including the image sensor capturing images of a property from a test pattern using different image sensor elements. The non-uniformity of the image sensor can be mapped by storing the values of the property with the respective image sensor element coordinates in a look-up table.
Claims24
A method for mapping non-uniformities of an image sensor comprising image sensor elements in an image sensor area, each image sensor element having a coordinate and being configured to image a property from a test pattern, and wherein the test pattern has one or more subunits, the method comprising the steps of:
- for at least two different sets of image sensor elements imaging the same one or more subunits of the test pattern,
- relative moving of the image sensor and the one or more subunits of the test pattern and positioning the image sensor and the one or more subunits of the test pattern relative to each other such that the at least two different sets of image sensor elements image the one or more subunits of the test pattern,
- capturing an image of the one or more subunits of the test pattern by each of the at least two different sets of image sensor elements,
- registering the property from the one or more subunits of the test pattern and image sensor element coordinate,
- mapping the non-uniformities between the at least two different sets of image sensor elements by storing values of each registered property and image sensor element coordinate for the one or more subunits of the test pattern in a look-up table, and
- calibrating at least one of the at least two different sets of image sensor elements for the property based on the mapped non-uniformities between the at least two different sets of image sensor elements.
A system for mapping non-uniformities of an image sensor comprising image sensor elements in an image sensor area, each image sensor element having a coordinate and being configured to image a property from a test pattern, wherein the test pattern has one or more subunits,
- wherein the system is configured to implement the steps of, for at least two different sets of image sensor elements imaging the same one or more subunits of the test pattern,
- moving the image sensor and the one or more subunits of the test pattern relative to each other and positioning relative positions of the image sensor and the one or more subunits of the test pattern such that the at least two different sets of image sensor elements image the one or more subunits of the test pattern,
- capturing an image of the one or more subunits of the test pattern by each of the at least two different sets of image sensor elements,
- registering the property from the one or more subunits of the test pattern and image sensor element coordinate, and
- mapping the non-uniformities between the at least two different sets of image sensor elements by storing the values of each registered property and image sensor element coordinate between the at least two different sets of image sensor elements in a look-up table, and
- calibrating at least one of the at least two different sets of image sensor elements for the property based on the mapped non-uniformities between the at least two different sets of image sensor elements.
Dependencies are inferred from the claim text.