公开(公告)号：US12118696B2

公开(公告)日：2024-10-15

申请号：US17827101

申请日：2022-05-27

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： So Jin Moon ,  Hyoung Seok Ko

IPC: G06K9/00 ,  G06T5/70 ,  G06T5/73 ,  H04N25/60 ,  G06T5/20

CPC classification number: G06T5/70 ,  G06T5/73 ,  H04N25/60 ,  G06T5/20 ,  G06T2207/20192

Abstract: An image signal processor includes a gradation detection module configured to receive a pixel signal from an external device and a correction module configured to receive the pixel signal. The correction module is connected to the gradation detection module. The gradation detection module is configured to estimate a gradient of the pixel signal, correct the pixel signal based on the gradient to generate a corrected pixel signal, calculate a first variance value based on the pixel signal, calculate a second variance value based on the corrected pixel signal, calculate a gradation probability value based on a comparison result between the first variance value and the second variance value, and generate a gradation map as information about the gradation probability value of the pixel signal. The correction module is configured to correct the pixel signal based on the gradation map.