US 12,260,532 B2
Linear transform of undistorted image for fusion
Kaiming Liu, Cupertino, CA (US); Maxim Smirnov, San Jose, CA (US); William T. Warner, Sunnyvale, CA (US); David Pope, Campbell, CA (US); Hui Chao, San Jose, CA (US); and Jason Holloway, Cupertino, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Nov. 3, 2021, as Appl. No. 17/518,437.
Prior Publication US 2023/0138779 A1, May 4, 2023
Int. Cl. G06T 5/50 (2006.01); G06F 18/25 (2023.01); G06T 3/18 (2024.01); G06T 5/70 (2024.01); G06T 5/80 (2024.01); G06T 7/33 (2017.01)
CPC G06T 5/80 (2024.01) [G06F 18/251 (2023.01); G06T 3/18 (2024.01); G06T 5/50 (2013.01); G06T 5/70 (2024.01); G06T 7/33 (2017.01)] 20 Claims
OG exemplary drawing
 
1. An image signal processor, comprising:
a warping circuit configured to modify a first image to align with a second image, the warping circuit configured to apply transformation to the first image in nonlinear space to generate a modified first image in the nonlinear space, the applied transformation corresponding to:
undistorting the first image to linear space by applying corrective transformation,
applying linear transformation to the undistorted first image, and distorting the linear transformed first image into the modified first image by applying inverse of the corrective transformation; and
an image fusion processor coupled to the warping circuit, the image fusion processor configured to fuse the modified first image with the second image to generate a fused image.