公开(公告)号：US20240388739A1

公开(公告)日：2024-11-21

申请号：US18441725

申请日：2024-02-14

Applicant: Netflix, Inc.

Inventor： Joel Sole Rojals

IPC: H04N19/86 ,  H04N19/167 ,  H04N19/182

Abstract: A computer-implemented method includes accessing a video frame that includes multiple pixels. The method also includes computing a local distribution for a specified region of the video frame that includes various pixels that are likely to include banding artifacts. This computing includes: defining a probability range for the local distribution that lies within a predefined interval, generating, using the defined probability range, a cumulative vector that includes a distribution of pixels values along a cumulative range of pixels that lie within the specified region of the video frame, and selecting a pseudorandom value within the cumulative range. The method further includes applying dithering at least to the specified region of the video frame using the selected pseudorandom values within the cumulative range. Various other methods, systems, and computer-readable media are also disclosed.

公开(公告)号：US11778240B2

公开(公告)日：2023-10-03

申请号：US17351955

申请日：2021-06-18

Applicant: NETFLIX, INC.

Inventor： Pulkit Tandon ,  Mariana Fernandez Afonso ,  Joel Sole Rojals ,  Lukas Krasula

IPC: H04N19/86 ,  H04N19/182 ,  H04N19/117

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/182

Abstract: A banding detection application generates a first set of pixel confidence values based on a first intensity difference value and first image scale associated with a first image, wherein each pixel confidence value included in the first set of pixel confidence values indicates a likelihood that a corresponding pixel included in the first image at the first image scale corresponds to banding in the first image. The banding detection application then generates a banding index corresponding to the first image based on the first set of pixel confidence values.