Noise reduction device for reducing noise in image using blackout image, electronic camera, program, and method
AssigneeNikon Corporation
InventorYutaka Tsuda
Life of this patent
Estimating the term…
Abstract
The noise reduction device includes an image storage unit, a blackout image processing unit, and a noise processing unit. The image storage unit captures image data obtained by imaging a field with an image sensor, and stores the image data therein. The blackout image processing unit captures blackout image data obtained by imaging by the image sensor that is shaded, and extracts a specific noise component of the blackout image data. The noise processing unit reduces a noise in the image data based on the specific noise component of the blackout image data.
Claims10
A noise reduction device comprising:
- an image storage unit capturing image data obtained by imaging a field with an image sensor and storing the image data therein;
- a blackout image processing unit capturing blackout image data obtained by performing the imaging with said image sensor being shaded, and extracting a specific noise component of said blackout image data;
- and
- a noise processing unit reducing a noise in said image data based on said specific noise component of said blackout image data,
- wherein:
- said blackout image processing unit extracts a value equal to or larger than a predetermined value from said blackout image data as said specific noise component;
- and
- said noise processing unit comprises
- a noise detection unit detecting a noise position at which said specific noise component exceeds a predetermined threshold value, and
- a noise reduction unit replacing a value of a noise pixel of said image data corresponding to said noise position with a value corresponding to a nearby pixel of said noise pixel to achieve noise reduction.
A noise reduction method comprising the steps of:
- capturing image data obtained by imaging a field with an image sensor and storing the image data, the step being performed by an image storage unit;
- capturing blackout image data obtained by performing the imaging with said image sensor being shaded, and extracting a specific noise component of said blackout image data the step being performed by a blackout image processing unit;
- and
- reducing a noise in said image data based on said specific noise component of said blackout image data, the step being performed by a noise processing unit,
- wherein:
- said blackout image processing unit extracts a value equal to or larger than a predetermined value from said blackout image data as said specific noise component;
- and
- said noise processing unit comprises
- a noise detection unit detecting a noise position at which said specific noise component exceeds a predetermined threshold value, and
- a noise reduction unit replacing a value of a noise pixel of said image data corresponding to said noise position with a value corresponding to a nearby pixel of said noise pixel to achieve noise reduction.
Dependencies are inferred from the claim text.