Low light high dynamic range image processing
AssigneeGoPro, Inc.
InventorsAnantha Keshava Belur Sowmya Keshava, Ojas Gandhi
Life of this patent
Estimating the term…
Abstract
High dynamic range (HDR) image processing for low light conditions is performed by obtaining three images. The three images include a first long exposure image and a pair of digitally overlapped (DOL) multi-exposure images. The DOL multi-exposure images include a second long exposure image and a short exposure image. Respective RGB images are obtained from the first long exposure image and the pair of DOL multi-exposure images. The respective RGB images are fused to generate a low light HDR image.
Claims20
An image capture device, comprising:
- an image sensor configured to obtain a first long exposure image and a pair of digitally overlapped (DOL) multi-exposure images, wherein the pair of DOL multi-exposure images includes a second long exposure image and a short exposure image;
- a processor configured to:
- obtain a first RGB image from the first long exposure image;
- obtain a second RGB image from the second long exposure image;
- obtain a third RGB image from the short exposure image;
- fuse the first RGB image, the second RGB image, and the third RGB image to obtain a fused image;
- and
- generate a low light high dynamic range (HDR) image from the fused image;
- and
- a memory configured to store the low light HDR image.
A method, comprising:
- obtaining a first RGB image from a first long exposure image;
- obtaining a second RGB image from a second long exposure image of a pair of digitally overlapped (DOL) multi-exposure images;
- obtaining a third RGB image from a short exposure image of the pair of DOL multi-exposure images;
- fusing the first RGB image, the second RGB image, and the third RGB image to obtain a fused image;
- and
- generating a low light high dynamic range (HDR) image from the fused image for storage.
A non-transitory computer-readable medium comprising instructions stored in a memory, that when executed by a processor, cause the processor to:
- obtain a first long exposure image;
- obtain a pair of digitally overlapped (DOL) multi-exposure images, wherein the pair of DOL multi-exposure images includes a second long exposure image and a short exposure image, wherein exposure durations of the pair of DOL multi-exposure images are based on obtained statistics;
- obtain a first RGB image from the first long exposure image;
- obtain a second RGB image from the second long exposure image;
- obtain a third RGB image from the short exposure image;
- fuse the first RGB image, the second RGB image, and the third RGB image to obtain a fused image;
- generate a low light high dynamic range (HDR) image from the fused image;
- and
- store the low light HDR image.
Dependencies are inferred from the claim text.