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US 8,009,207 B2Granted
Noise reduction device for reducing noise in image using blackout image, electronic camera, program, and method
AssigneeNikon Corporation
InventorsYutaka Tsuda, Daiki Ito
Life of this patent
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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.
Claims11
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 fixed pattern noise component of said blackout image data by suppressing a high spatial frequency component of said blackout image data;
- and
- a noise processing unit reducing a noise in said image data based on said fixed pattern noise component of said blackout image data,
- wherein
- said blackout image processing unit comprises:
- a level selection unit selecting, as a low-level pixel, a pixel having a low level that is equal to or smaller than a predetermined threshold value from said blackout image data;
- and
- a variation suppressing unit suppressing a high spatial frequency component for the selected low-level pixel to obtain said fixed pattern noise component.
6 more elements
Dependencies are inferred from the claim text.