US 12,452,450 B2
Dynamic spatial metadata for image and video processing
Robin Atkins, Vancouver (CA); and Per Jonas Andreas Klittmark, Mountain View, CA (US)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Appl. No. 18/694,635
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
PCT Filed Sep. 20, 2022, PCT No. PCT/US2022/044115
§ 371(c)(1), (2) Date Mar. 22, 2024,
PCT Pub. No. WO2023/055612, PCT Pub. Date Apr. 6, 2023.
Claims priority of provisional application 63/250,407, filed on Sep. 30, 2021.
Claims priority of application No. 21208718 (EP), filed on Nov. 17, 2021.
Prior Publication US 2024/0397088 A1, Nov. 28, 2024
Int. Cl. H04N 19/00 (2014.01); G06T 5/30 (2006.01); H04N 19/117 (2014.01); H04N 19/167 (2014.01); H04N 19/59 (2014.01)
CPC H04N 19/59 (2014.11) [G06T 5/30 (2013.01); H04N 19/117 (2014.11); H04N 19/167 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for processing spatial metadata with a processor, the method comprising:
accessing an input image (202) in an input spatial resolution and an input aspect ratio;
computing (210) first metadata parameters for the input image at a first spatial resolution, wherein the first spatial resolution is equal or smaller to the input spatial resolution;
determining (205) a second spatial resolution for spatial metadata parameters, wherein the second spatial resolution is smaller than the first spatial resolution;
computing a global metadata parameter for the input image based on the first metadata parameters, wherein the global metadata parameter is representative of pixel values over the whole input image;
generating (220) smoothed metadata parameters by smoothing the first metadata parameters; and
down-sampling (225) the smoothed metadata parameters to generate the spatial metadata parameters at the second spatial resolution, wherein the spatial metadata parameters are representative of pixel values in sub-regions of the input image.