US 12,462,429 B2
Image processing device and method of generating physical intrinsic identification key
Ken Sawada, Icheon-si (KR)
Assigned to SK hynix Inc., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Aug. 10, 2023, as Appl. No. 18/447,879.
Claims priority of application No. 10-2023-0020826 (KR), filed on Feb. 16, 2023.
Prior Publication US 2024/0282005 A1, Aug. 22, 2024
Int. Cl. G06T 7/80 (2017.01)
CPC G06T 7/80 (2017.01) 19 Claims
OG exemplary drawing
 
1. An image processing device comprising:
a noise information manager configured to manage noise information of a target image sensor and manage noise information of a reference image sensor;
a physical intrinsic identification key generator configured to:
calculate an internal Hamming distance with respect to a physical intrinsic identification key of the target image sensor and a mutual Hamming distance with respect to physical intrinsic identification keys of the target image sensor and the reference image sensor, based on the noise information;
determine a size of the physical intrinsic identification key of the target image sensor based on the internal Hamming distance and the mutual Hamming distance; and
generate the physical intrinsic identification key of the target image sensor, from a difference between noise signals output from pixels of the target image sensor that are adjacent to each other; and
an intrinsic image generator configured to generate intrinsic image data, which includes the physical intrinsic identification key of the target image sensor.