Patent ID: 11887282
Assignee: SK HYNIX INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A noise removing circuit, comprising:
an image combiner suitable for generating a high dynamic range (HDR) image by combining images having different exposure times;
a detailed image generator suitable for generating a detailed image from the HDR image;
an image strength evaluator suitable for evaluating strength of the detailed image; and
a noise coring component suitable for performing a noise coring operation for removing noise from a region of the detailed image in which a signal to noise ratio (SNR) has decreased using a low threshold and a saturation threshold when the strength of the detailed image is less than a reference value,
wherein the noise coring component adjusts a noise coring strength using a coring width parameter in a first region in which a long exposure image and a middle exposure image overlap and a second region in which the middle exposure image and a short exposure image overlap.