Method and apparatus for simultaneously reducing various kinds of noises from image
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United States of America Patent
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Oct 1, 2013
Grant Date -
Feb 26, 2009
app pub date -
Jan 24, 2008
filing date -
Aug 24, 2007
priority date (Note) -
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Abstract
Provided are a method and apparatus for simultaneously reducing various kinds of noises in an image output from an image sensor equipped to a camera. The image noise reducing method includes: determining a color reference value, which corresponds to a corrected value of the color value of a current pixel, based on the difference values between the color value of the current pixel among pixels of an image and the color values of neighboring pixels around the current pixel; determining unified filter kernel coefficients, which represent the weights of the current pixel and the neighboring pixels, based on the similarities between the determined color reference value and the color values of the neighboring pixels; and reducing a noise in the color value of the current pixel by weighted-averaging the color value of the current pixel and the color values of the neighboring pixels using the unified filter kernel coefficients.
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