公开(公告)号：US20240393509A1

公开(公告)日：2024-11-28

申请号：US18343886

申请日：2023-06-29

Applicant: Korea Electronics Technology Institute

Inventor： Ji Soo HONG ,  Sung Hee HONG ,  Young Min KIM ,  Jin Soo JEONG ,  Yong Hwa KIM ,  Byoung Hyo LEE ,  Hyeon Chan OH

IPC: G02B5/124 ,  G02B27/09

Abstract: There is provided a thin optical system for real-world occlusion in an augmented reality display. The optical system according to an embodiment includes: a first DCRA configured to reflect light beams focused on holes; a mask positioned on a light emitting surface of the first DCRA to pass or block the light beams emitted from the first DCRA; and a second DCRA configured to reflect the light beams which are focused on holes after passing through the mask. Accordingly, the optical system can implement real-world occlusion in the unit of pixel while having a thin form factor.

公开(公告)号：US20240397167A1

公开(公告)日：2024-11-28

申请号：US18344065

申请日：2023-06-29

Applicant: Korea Electronics Technology Institute

Inventor： Ji Soo HONG ,  Sung Hee HONG ,  Young Min KIM ,  Jin Soo JEONG ,  Yong Hwa KIM ,  Byoung Hyo LEE ,  Hyeon Chan OH

IPC: H04N21/8358 ,  H04N21/234 ,  H04N21/239 ,  H04N21/24

Abstract: There is provided an object attribute-based watermarking method for preventing leakage of a digital content. A video watermarking method according to an embodiment may acquire a requested video and watermarking information upon receiving a request for video streaming from a user, may determine some of objects appearing in the video according to the watermarking information, may transform attributes of the determined objects, and may stream the transformed video. Accordingly, by watermarking an attribute of an object appearing in a video differently according to a user and providing the video, a watermark may be difficult to perceive, robustness against various attacks may be guaranteed, and a leakage path of a content may be checked.

公开(公告)号：US20220214749A1

公开(公告)日：2022-07-07

申请号：US17595491

申请日：2019-09-18

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Woo Chool PARK ,  Jun Hwan JANG ,  Yong Hwa KIM ,  Jin Wook YANG ,  Sang Pil YOON ,  Hyun Wook KIM ,  Eun Kyung CHO ,  Min Su CHOI ,  Jun Suk LEE ,  Jae Young YANG

IPC: G06F3/01 ,  A63F13/285

Abstract: A haptic effect transmission method for providing real-time immersive content according to the present invention includes executing participatory content in which one or more users participate, collecting motion information of the users participating in the participatory content through a haptic device, multiplexing the motion information with video and audio files of the participatory content to obtain a multiplexed file, and demultiplexing the multiplexed file and providing the demultiplexed file to a display device and a haptic device of a client terminal.