Imaging device and image processing program for estimating fixed pattern noise from partial noise output of available pixel area
AssigneeNikon Corporation
InventorAkihiko Morishita
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Abstract
An imaging device of the present invention includes an image capturing unit, a noise obtaining unit, a fixed noise calculating unit, and a noise eliminating unit. The image capturing unit generates image data by photoelectrically converting, pixel by pixel, a subject image formed on an available pixel area of a light-receiving surface. The noise obtaining unit reads a noise output from a partial area of the available pixel area. The fixed noise calculating unit calculates an estimation of fixed pattern noise of the available pixel area based on the noise output read from the partial area. The noise eliminating unit subtracts the fixed pattern noise from the image data.
Claims5
An imaging device comprising:
- an image capturing unit that generates image data by photoelectrically converting, pixel by pixel, a subject image formed on an available pixel area of a light-receiving surface;
- a noise obtaining unit that reads a noise output only from a partial area of the available pixel area;
- wherein the partial area from which the noise output is read is a predetermined row and a predetermined column of the available pixel area;
- a fixed noise calculating unit that calculates an estimation of fixed pattern noise of an entire area of the available area by expanding a regularity of a noise pattern of the partial area throughout the entire area of the available pixel area, the noise pattern being obtained from the noise output;
- and
- a noise eliminating unit that subtracts the fixed pattern noise from the image data, and
- wherein the fixed noise calculating unit calculates an estimation of the fixed pattern noise of an Xth column/a Yth row of the available pixel area based on the noise output of an Xth column of the predetermined row and the noise output of a Yth row of the predetermined column.
A non-transitory computer readable medium causing a control unit to execute a process, the process comprising:
- generating image data by photoelectrically converting, pixel by pixel, a subject image formed on an available pixel area of a light-receiving surface;
- reading a noise output only from a partial area of the available pixel area;
- wherein the partial area from which the noise output is read is a predetermined row and a predetermined column of the available pixel area;
- calculating an estimation of fixed pattern noise of an entire area of the available area by expanding a regularity of a noise pattern of the partial area throughout the entire area of the available pixel area, the noise pattern being obtained from the noise output;
- and
- subtracting the fixed pattern noise from the image data, and
- wherein the calculating an estimation of fixed pattern noise calculates an estimation of the fixed pattern noise of an Xth column/a Yth row of the available pixel area based on the noise output of an Xth column of the predetermined row and the noise output of a Yth row of the predetermined column.
Dependencies are inferred from the claim text.