US 11,659,141 B2
Image processing apparatus and method
Yuoonman Han, Seongnam-Si (KR)
Assigned to HANWHA TECHWIN CO., LTD., Seongnam-Si (KR)
Filed by HANWHA TECHWIN CO., LTD., Seongnam-Si (KR)
Filed on Sep. 1, 2020, as Appl. No. 17/9,639.
Claims priority of application No. 10-2019-0151395 (KR), filed on Nov. 22, 2019; and application No. 10-2020-0094365 (KR), filed on Jul. 29, 2020.
Prior Publication US 2021/0160415 A1, May 27, 2021
Int. Cl. H04N 7/18 (2006.01); H04N 23/71 (2023.01); G06T 5/20 (2006.01); G06V 10/25 (2022.01)
CPC H04N 23/71 (2023.01) [G06T 5/20 (2013.01); G06V 10/25 (2022.01); H04N 7/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image processing apparatus, comprising:
a processor; and
a memory configured to store program instructions to be executed by the processor,
the program instructions, when executed by the processor, being configured to implement:
an image receiver configured to receive a first image signal;
a filter configured to filter the first image signal to obtain a second image signal;
a region comparer configured to obtain first luminance information corresponding to the first image signal and second luminance information corresponding to the second image signal, and to generate third luminance information by using the first luminance information and the second luminance information;
a region determinator configured to calculate a brightness level value for the first image signal by using the first luminance information;
a reliability determinator configured to calculate a reliability determination value for the first image signal by using the first luminance information;
an extractor configured to generate a luminance correction threshold value of the first image signal by using the brightness level value of the first image signal, which is output from the region determinator, and the reliability determination value of the first image signal which is output from the reliability determinator; and
an interpolator configured to output corrected luminance information for the first luminance information by using the luminance correction threshold value and the third luminance information.