Image noise reduction apparatus and method
AssigneeSamsung Electronics Co., Ltd.
InventorsSoo-young KIM, Dong-bum CHOI
Life of this patent
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Abstract
Provided is an image noise reduction method and apparatus in consideration of brightness of an image in a camera using an image pickup device such as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). The method includes: detecting a degree of image motion by using data from a plurality of frames which are picked up; detecting brightness of an image which is picked up; determining a ratio between current frame data and previous frame data according to the image motion degree and the brightness of the image; and combining the current frame data with the previous frame data according to the determined frame data ratio.
Claims13
An image noise reduction method, comprising:
- detecting a degree of image motion by using data of a plurality of frames which are picked up;
- detecting brightness of an image which is picked up;
- determining a ratio between current frame data and previous frame data according to the image motion degree and the brightness of the image;
- and
- combining the current frame data with the previous frame data according to the determined frame data ratio.
An image noise reduction apparatus, comprising:
- a motion detector detecting image motion information by using data of a plurality of frames which are picked up;
- a gain determiner determining gain coefficients used to determine a ratio between current frame data and previous frame data on the basis of the motion information and brightness information on an image;
- and
- a filter combining the current frame data with the previous frame data according to the gain coefficients set by the gain determiner.
A video camera system comprising:
- an image pickup device picking up an object image formed on a plane of incidence and outputting a corresponding analog image signal;
- an analog signal processor performing auto gain control on the analog image signal output from the image pickup device by AGC;
- an analog-digital converter converting the analog image signal output from the analog signal processor into a digital image signal;
- a digital signal processor detecting a degree of image motion by using an image signal of a plurality of frames output from the analog-digital converter, setting gain coefficients which are used to determine a ratio between current frame data and previous frame data according to the motion degree and brightness of the picked up images, and combining the current frame data with the previous frame data according to the gain coefficients.
Dependencies are inferred from the claim text.