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US 8,478,058 B2Granted
Apparatus and method for reducing noise from an image
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-Jin Yoo, Ho-cheon Wey
Life of this patent
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Abstract
An apparatus and method for reducing noise in a high definition image are provided. When performing wavelet shrinkage for reducing noise, a signal level of an image may be estimated by adjusting a kernel size, and a noise level of the image may be estimated using a noise level function. After the signal level and the noise level are estimated, the noise may be removed or reduced, based on the signal level and the noise level, and the detail of the image may be maintained.
Claims18
An apparatus for reducing noise in an image, the apparatus comprising:
- a transformation unit to divide the image into a plurality of sub-bands through wavelet transformation;
- a signal level estimation unit to estimate the signal level of the image using a kernel of which a size varies according to a resolution level and binary data of each sub-band;
- a noise level estimation unit to estimate a noise level of the image using a predetermined noise profile;
- and
- a noise reducing unit to reduce noise in the image using the estimated signal level and the estimated noise level.
2 more elements
A method of reducing noise in an image, the method comprising:
- dividing the image into a plurality of sub-bands through wavelet transformation;
- estimating a signal level of the image using a kernel of which a size varies according to a resolution level and binary data of each sub-band;
- estimating a noise level of the image using a noise profile;
- and
- reducing noise in the image using the estimated signal level and the estimated noise level.
2 more elements
Dependencies are inferred from the claim text.