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

Claim 5:
6. An image sensing device, comprising:
an image sensor including a pixel array having a plurality of pixels;
an image signal processor suitable for processing an output signal of the image sensor; and
a noise removing circuit including:
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 a 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 the long exposure image and the middle exposure image overlap and a second region in which the middle exposure image and the short exposure image overlap.