Image fusion architecture

A method for image fusion, comprising:

• receiving, via an image interface, a first image comprising a plurality of color components that captures a scene with a first exposure time;
• receiving, via the image interface, a second image comprising the plurality of color components that captures the scene with a second exposure time;
• extracting information about first keypoints in the first image by processing pixel values of pixels in the first image;
• warping a processed version of the first image according to one or more warping parameters derived from a model describing correspondence between the first image and the second image to generate a warped version of the first image spatially more aligned to the second image than to the first image, the model determined by processing at least the information about first keypoints;
• and
• fusing per pixel the warped version of the first image and a processed version of the second image to generate a fused image comprising the plurality of color components.

A system, comprising:

• an image sensor configured to obtain a first image and a second image having a plurality of color components, the first image capturing a scene with a first exposure time and a second image capturing the scene with a second exposure time;
• an image signal processor coupled to the image sensor, the image signal processor configured to perform processing of the first image and the second image to obtain a fused image having the plurality of color components, the image signal processor including:
• a first feature extractor circuit configured to extract information about first keypoints in the first image by processing pixel values of pixels in the first image;
• a warping circuit configured to warp a processed version of the first image according to one or more warping parameters derived from a model describing correspondence between the first image and the second image to generate a warped version of the first image spatially more aligned to the second image than to the first image, the model determined by processing at least the information about first keypoints, and
• an image fusion processing circuit configured to fuse the warped version of the first image and a processed version of the second image to generate the fused image.