Noise reduction of panchromatic and color image
View Patent ↗A method for producing a noise-reduced digital color image, includes providing an image having panchromatic pixels and color pixels corresponding to at least two color photoresponses; providing from the image a panchromatic image and at least one color image; and using the panchromatic image and the color image to produce the noise-reduced digital color image.
1. A method for producing a noise-reduced digital color image, comprising:
(a) providing an image having panchromatic pixels and color pixels corresponding to at least three color photoresponses;
(b) providing from the image a panchromatic image and interpolating the panchromatic image to provide a full-resolution panchromatic image;
(c) using the full-resolution panchromatic image and neighboring same color pixel values to produce a noise-reduced color pixel and repeating this step for each color pixel; and
(d) interpolating the noise-reduced color pixels to produce interpolated color pixels to thereby provide a noise-reduced digital color image.
2. The method of claim 1 further includes providing further noise reduction on the noise-reduced digital color image to produce a final noise-reduced digital color image.
3. The method of claim 1 further including noise-reducing all panchromatic values in the full-resolution panchromatic image prior to step (c) to produce a noise-reduced full-resolution panchromatic image.
4. The method of claim 1 wherein step a) includes color pixels having the following photosensitivities of red, green, and blue.
5. The method of claim 1 wherein step a) includes color pixels having the following photosensitivities of cyan, magenta, and yellow.