Patent ID: 11941791
Assignee: DOLBY LABORATORIES LICENSING CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for generating a high-dynamic-range (HDR) image, comprising:
denoising a short-exposure-time image, wherein denoising comprises
applying a first guided filter to the short-exposure-time image, the guided filter utilizing a long-exposure-time image as its guide,

after the step of denoising, applying a second guided filter to the long-exposure-time image, the second guided filter utilizing the short-exposure-time image as its guide, and scaling at least one of the short-exposure-time image and the long-exposure-time image to place the short-exposure-time image and the long-exposure-time image on a common radiance scale; and
after the step of scaling, merging the short-exposure-time image with the long-exposure-time image to generate the HDR image.