Accelerative noise filtering method for image data

Details Accelerative noise filtering method for image data Accelerative noise filtering method for image data

2007-04-10

2007-04-10

Couso, Yon J. (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C348S607000

Reexamination Certificate

active

10255965

ABSTRACT:
An accelerative noise filtering method for image data is provided. The present invention includes selecting four neighboring pixels around a target pixel in a pattern of a cross shape or X shape, and calculating the absolute value of a difference between the target pixel and each of the four neighboring pixels. When the absolute value of the difference of the neighboring pixel is not larger than a standard deviation, a binary value of a bit corresponding to the neighboring pixel is set “1”. When the absolute value of the difference of the neighboring pixel is larger than a standard deviation, a binary value of a bit corresponding to the neighboring pixel is set “0”. Consequently, a 4-bit mapping table including the binary values of the four neighboring pixels is obtained. Then, a new pixel value for replacing the target pixel value is calculated based on a calculation derived from the 4-bit mapping table.

REFERENCES:
patent: 5663764 (1997-09-01), Kondo et al.
patent: 5959693 (1999-09-01), Wu et al.
patent: 6151410 (2000-11-01), Kuwata et al.
patent: 2003/0021489 (2003-01-01), Miura et al.

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