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公开(公告)号：US12014439B2
公开(公告)日：2024-06-18
申请号：US17768528
申请日：2019-10-15
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee Hong , Young Min Kim , Ji Soo Hong
CPC classification number: G06T1/0021 , H04N1/3224 , G06T2201/0051
Abstract: Provided is a method for inserting a copyright information indication as a means for protecting the copyright of LF content which can be played back as multi-viewpoint images, wherein the copyright information indication is only inserted in images of a specific viewpoint. A method for generating multi-viewpoint images according to an embodiment of the present invention includes the steps of: generating multi-viewpoint images; inserting a specific information indication in images of a specific viewpoint among the generated multi-viewpoint images; and storing the multi-viewpoint images in which the specific information indication has been inserted. Accordingly, the copyright of LF content, which are expensive multi-viewpoint images, can be protected by inserting the copyright information indication only in the images of the specific viewpoint.
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公开(公告)号：US11852847B2
公开(公告)日：2023-12-26
申请号：US16969666
申请日：2018-02-13
Applicant: Korea Electronics Technology Institute
Inventor： Young Min Kim , Ji Soo Hong , Hoon Jong Kang , Sung Hee Hong , Choon Sung Shin
CPC classification number: G02B30/33 , G02B26/0816 , G02B27/30
Abstract: Provided is a Maxwellian view display which uses a space-time multiplexing scheme and widens a field of view, thereby having a degree of freedom within a set area instead of a fixed position while maintaining the advantage of the existing Maxwellian view, in which a clear image can be observed irrespective of the difference in individual ability for focal point adjustment since the focal point does not need to be adjusted. According to an embodiment of the present invention, a display includes: a light source unit for changing the position of a point light source according to time; a first lens for converting the light emitted from the light source unit to be parallel; an image generating unit for generating an image using the parallel light incident from the first lens; and a second lens for focusing the image generated by the image generating unit.
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公开(公告)号：US10609563B2
公开(公告)日：2020-03-31
申请号：US15327375
申请日：2016-01-22
Applicant: Korea Electronics Technology Institute
Inventor： Choon Sung Shin , Sung Hee Hong , Ji Soo Hong , Young Min Kim , Hoon Jong Kang , Young Choong Park
IPC: G06K19/06 , H04W12/12 , B29C67/00 , B33Y50/02 , B33Y80/00 , G06K19/14 , G06K19/10 , G01V15/00 , G06K9/00 , H04W12/06
Abstract: A method for inserting information into a 3D structure and recognizing information in a non-destructive method is provided. A 3D printing method according to an exemplary embodiment of the present invention includes: generating a tag having specific information recorded thereon to be inserted into a 3D structure, and printing the tag on the inside of the 3D structure while printing the 3D structure. Accordingly, since the tag having information recorded thereon is printed on the inside of the 3D structure when the 3D structure is printed by a 3D printer, it is impossible to forge/falsify information.
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Patent Agency Ranking
公开(公告)号：US12249032B2
公开(公告)日：2025-03-11
申请号：US18013317
申请日：2021-12-15
Applicant: Korea Electronics Technology Institute
Inventor： Ji Soo Hong , Sung Hee Hong , Young Min Kim , Jin Soo Jeong , Byoung Hyo Lee
Abstract: Provided is a cognitive experiment method for change in periphery region image quality for parameter determination of a foveated hologram. According to an embodiment, a cognitive experiment method for determining foveated image parameters includes: generating a foveated image which includes a foveal region and a periphery region while reducing image quality regarding the periphery region; displaying the generated foveated image; receiving an input of a response to image quality of the periphery region from a subject; and collecting information regarding appropriate image quality of the periphery region, based on the response inputted by the subject. Accordingly, in applying a foveated hologram generation algorithm for real-time reproduction, various parameters such as a boundary between a foveal region image and a periphery region image in a foveated hologram, and a degree of quality degradation of the periphery region image may be appropriately determined through a cognitive experiment.
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公开(公告)号：US20250019488A1
公开(公告)日：2025-01-16
申请号：US18503651
申请日：2023-11-07
Inventor： Tae Young Choi , Keum Hwan Park , Young Min Kim , Young Eun Kim , Ji Young Kim
Abstract: In embodiment, a binder composition includes a multifunctional compound containing three or more functional groups, a first bifunctional epoxy resin, and a second bifunctional epoxy resin. The second bifunctional epoxy resin can have a weight average molecular weight greater than a weight average molecular weight of the first bifunctional epoxy resin, and a mass ratio of the first bifunctional epoxy resin and the second bifunctional epoxy resin is in a range from 0.45:1 to 7.0:1. In an embodiment, an epoxy-based cured product includes such binder composition. And in an embodiment, a light emitting layer includes such epoxy-based cured product.
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公开(公告)号：US12158727B2
公开(公告)日：2024-12-03
申请号：US17621890
申请日：2020-12-02
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee Hong , Young Min Kim , Ji Soo Hong , Jin Soo Jeong
IPC: G03H1/04
Abstract: Provided is a hologram printing method and apparatus using a hologram medium light efficiency map. A hologram printing method according to an embodiment emits a laser to a hologram medium, acquires an image by photographing light diffracted from the hologram medium, generates a light efficiency map of the hologram medium from the acquired image, and records hogels on the hologram medium by referring to the generated light efficiency maps of the hologram medium. Accordingly, light efficiency is measured on each hogel area, and hologram printing is performed by adjusting an intensity of a laser of each wavelength according to a hogel, so that uniformity of luminance and color of a hologram printing result can be enhanced.
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公开(公告)号：US12067435B2
公开(公告)日：2024-08-20
申请号：US17623221
申请日：2021-12-07
Applicant: Korea Electronics Technology Institute
Inventor： Sung Hee Hong , Young Min Kim , Ji Soo Hong
CPC classification number: G06K19/06037 , G06K19/16 , G06K2207/1015
Abstract: Provided is an uncopyable hologram QR code, According to an embodiment of the present disclosure, a 3D code generation method divides a 2D code having specific information recorded thereon into a plurality of sub 2D codes, and generatES a 3D code by coupling at least one of the divided sub 2D codes at a different depth. Accordingly, a QR code is recorded on a hologram recording medium as a hologram, and is displayed and scanned, so that it is impossible to easily duplicate the QR code unlike an existing 2D QR code.
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公开(公告)号：US10295830B2
公开(公告)日：2019-05-21
申请号：US15317203
申请日：2015-12-01
Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
Inventor： Ji Soo Hong , Hoon Jong Kang , Sung Hee Hong , Choon Sung Shin , Young Min Kim
Abstract: A laser light source shutter system includes a light source, a variable focus optical element to transmit a beam emitted from the light source, a pinhole located on an optical path through which the beam travels from the variable focus optical element, and a controller to control a transmission and blocking of the beam by controlling a focal length of the variable focus optical element to be equal to a distance between the variable focus optical element and the pinhole or to be equal to other distances different from the distance. Therefore, a laser light source shutter free from vibration can be realized electronically with a low cost and a high light-blocking rate using a variable focus optical element such as a variable focus lens and a variable focus mirror.
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