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

Claim 10:
11. An operation method of an image sensing device, comprising:
generating a high dynamic range (HDR) image by combining a long exposure image, a middle exposure image and a short exposure image;
generating a detailed image from the HDR image;
evaluating strength of the detailed image; and
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 low threshold indicates a first region in which the long exposure image and the middle exposure image overlap, and the saturation threshold parameter indicates a second region in which the middle exposure image and the short exposure image overlap, and
wherein performing the noise coring operation includes adjusting a noise coring strength using a coring width parameter in the first region and the second region.