Patent ID: 11922639
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. The method of claim 1, further comprising, for each image pixel of the motion-compensated HDR color image:
performing the step of obtaining; and
generating an output value for each of the three different colors, said generating including:
(i) for the first color:
(a) when the long-exposure-time pixels associated with the first color meet a below-saturation criterion:
(1) computing disparity between short-exposure-time pixels and long-exposure-time pixels of the local region and associated with the first color,
(2) computing a disparity threshold from an expectation value of pixel value variation associated with the image pixel and the first color,
(3) when the disparity exceeds the disparity threshold, performing the step of determining the motion parameter and the step of demosaicing for the first color to determine, with motion-compensation, the output value of the image pixel associated with the first color, and
(4) when the disparity does not exceed the disparity threshold, performing non-motion-compensated HDR demosaicing for the first color to determine, from a combination of the short-exposure-time pixels and the long-exposure-time pixels associated with the first color, the output value of the image pixel associated with the color, and

(b) when the long-exposure-time pixels associated with the first color do not meet the below-saturation criterion, performing non-motion-compensated demosaicing for the first color to determine, from only the short-exposure-time pixels associated with the first color, the output value for the image pixel associated with the first color, and

(ii) for each color different from the first color:
(a) when the long-exposure-time pixels associated with the color and the first color meet the below-saturation criterion and the disparity exceeds the disparity threshold, performing the step of demosaicing for the color to determine, with motion-compensation, the output value of the image pixel associated with the color,
(b) when the long-exposure-time pixels associated with the color and the first color meet the below-saturation criterion and the disparity does not exceed the disparity threshold, performing non-motion-compensated demosaicing for the color to determine, from a combination of the short-exposure-time pixels and the long-exposure-time pixels associated with the color, the output value of the image pixel associated with the color, and
(c) when the long-exposure-time pixels associated with the color do not meet the below-saturation criterion or the long-exposure-time pixels associated with the first color do not meet the below-saturation criterion, performing non-motion-compensated demosaicing for the color to determine, from only the short-exposure-time pixels associated with the color, the output value for the image pixel associated with the color.