Grid gain calculation circuit, image sensing device and operation method of the same
AssigneeSK hynix Inc.
InventorJae Yoon Yoo
Life of this patent
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Abstract
A grid gain calculation circuit includes a region setting component suitable for setting a grid region corresponding to a pixel array; a virtual grid point setting component suitable for setting virtual grid points with respect to outer grid points located on a border of a grid region and with respect to an inner grid point located in an inner area of the grid region close to the outer grid points; and a gain calculation component suitable for calculating a gain of the outer grid points based on a gain of the inner grid point and a gain of the virtual grid points.
Claims20
A grid gain calculation circuit, comprising:
- a region setting component suitable for setting a grid region corresponding to a pixel array during a calibration operation;
- a virtual grid point setting component suitable for setting virtual grid points with respect to outer grid points located on a border of a grid region and with respect to an inner grid point located in an inner area of the grid region close to the outer grid points;
- and
- a gain calculation component suitable for calculating a gain of the outer grid points based on a gain of the inner grid point and a gain of the virtual grid points,
- wherein the gain is associated with the calibration operation for balancing a pixel color level,
- wherein the virtual grid points are virtually set to an outer area of each set of the outer grid points based on the corresponding outer grid points and the corresponding inner grid point.
An image sensing device, comprising:
- an image sensor including a pixel array having a plurality of pixels;
- an image signal processor suitable for processing an output signal of the image sensor;
- and
- a grid gain calculation circuit,
- wherein the grid gain calculation circuit comprises
- a region setting component suitable for setting a grid region corresponding to the pixel array during a calibration operation;
- a virtual grid point setting component suitable for setting virtual grid points with respect to outer grid points located on a border of a grid region and with respect to an inner grid point located in an inner area of the grid region close to the outer grid points;
- and
- a calculation component suitable for calculating a gain of the outer grid points based on a gain of the inner grid point and a gain of the virtual grid points,
- wherein the gain is associated with the calibration operation for balancing a pixel color level,
- wherein the virtual grid points are virtually set to an outer area of each set of the outer grid points based on the corresponding outer grid points and the corresponding inner grid point.
An image sensing device comprising:
- an image sensor including a pixel array having a plurality of pixels;
- and
- a grid gain circuit suitable for:
- determining a grid region having a plurality of squares and a plurality of rectangles, which correspond to the pixel array during a calibration operation;
- determining an inner area including the plurality of squares and an outer area including the plurality of rectangles, from the grid region;
- determining corner regions of the outer area, each corner region including an inner grid point in the inner area and outer grid points;
- determining virtual grid points such that each corner region has the same size as each square;
- and
- calculating a gain of the outer grid points based on a gain of the inner grid point and a gain of the virtual grid points,
- wherein the gain is associated with the calibration operation for balancing a pixel color level,
- wherein the virtual grid points are virtually set to an outer area of each set of the outer grid points based on the outer grid points and the inner grid point.
Dependencies are inferred from the claim text.