CFA image with synthetic panchromatic image
View Patent ↗A method for forming a final digital color image with reduced motion blur including of a processor for providing images having panchromatic pixels and color pixels corresponding to at least two color photo responses, interpolating between the panchromatic pixels and color pixels to produce a panchromatic image and a full-resolution color image to produce a full-resolution synthetic panchromatic image from the full-resolution color image; and developing color correction weights in response to the synthetic panchromatic image and the panchromatic image; and using the color correction weights to modify the full-resolution color image to provide a final color digital image.
1. A method for forming a final digital color image with reduced motion blur, the method comprising:
(a) providing images having panchromatic pixels and color pixels corresponding to at least two color channels having associated color photo responses;
(b) interpolating between the panchromatic pixels to produce a full-resolution panchromatic image and interpolating between the color pixels to produce a full-resolution color image;
(c) producing a full-resolution synthetic panchromatic image from the full-resolution color image;
(d) computing color correction weights based on ratios of pixels in the full-resolution synthetic panchromatic image and corresponding pixels in the full-resolution panchromatic image; and
(e) using the color correction weights to modify the full-resolution color image to provide the final digital color image with reduced motion blur.
2. The method of claim 1 wherein the panchromatic pixels and the color pixels provided in step (a) are captured with different exposure times.
3. The method of claim 1 wherein the panchromatic pixels and the color pixels provided in step (a) are captured using a single image sensor having both panchromatic pixels and color pixels.
4. The method of claim 1 wherein step (c) includes computing the full-resolution synthetic panchromatic image by calculating a weighted sum of the color channels in the full-resolution color image.
5. The method of claim 1 wherein step (d) includes applying a nonlinear operation on the color correction weights.
6. The method of claim 5 wherein the color correction weights are limited to values less than or equal to one.
7. The method of claim 1 wherein step (e) includes multiplying the full-resolution color image by the color correction weights to provide the final color digital image.