Denoising method and denoising device for reducing noise in an image

A device for reducing noise in an input image corresponding to a color filter array of an image sensor, the device comprising:

• a local window generator configured to
• set, as a local window among color pixels included in the input image, a target pixel and neighboring pixels adjacent to the target pixel, and
• provide color pixel values for the target pixel and each of the neighboring pixels included in the local window;
• an average value generator configured to generate local color average values by averaging, color by color, the color pixel values;
• a converter configured to generate offset color pixel values by converting the color pixel values of the target pixel and the neighboring pixels based on the local color average values;
• and
• a compensator configured to generate a compensated color pixel value of the target pixel by adjusting the color pixel value of the target pixel based on the offset color pixel values.

A method of reducing noise in an input image corresponding to a color filter array of an image sensor, the method comprising:

• setting, as a local window among color pixels included in the input image, a target pixel and neighboring pixels adjacent to the target pixel;
• generating edge information by detecting edges included in the input image;
• determining color pixel values for the target pixel and each of the neighboring pixels included in the local window;
• generating local color average values by averaging, color by color, the color pixel values;
• generating offset color pixel values by converting the color pixel values of the target pixel and the neighboring pixels based on the local color average values;
• and
• generating a compensated color pixel value of the target pixel by adjusting the color pixel value of the target pixel based on the edge information and the offset color pixel values.