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WO2024117556A1 - Procédé de rendu d'image holographique pour impression qui ne nécessite pas de réagencement - Google Patents

Procédé de rendu d'image holographique pour impression qui ne nécessite pas de réagencement Download PDF

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Publication number
WO2024117556A1
WO2024117556A1 PCT/KR2023/017115 KR2023017115W WO2024117556A1 WO 2024117556 A1 WO2024117556 A1 WO 2024117556A1 KR 2023017115 W KR2023017115 W KR 2023017115W WO 2024117556 A1 WO2024117556 A1 WO 2024117556A1
Authority
WO
WIPO (PCT)
Prior art keywords
holographic
hogel
hologram
images
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2023/017115
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English (en)
Korean (ko)
Inventor
홍성희
김영민
홍지수
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Electronics Technology Institute
Original Assignee
Korea Electronics Technology Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korea Electronics Technology Institute filed Critical Korea Electronics Technology Institute
Publication of WO2024117556A1 publication Critical patent/WO2024117556A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0476—Holographic printer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/10—Geometric effects
    • G06T15/20—Perspective computation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T15/00—3D [Three Dimensional] image rendering
    • G06T15/10—Geometric effects
    • G06T15/20—Perspective computation
    • G06T15/205—Image-based rendering
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2249—Holobject properties
    • G03H2001/2252—Location of the holobject
    • G03H2001/226—Virtual or real

Definitions

  • the present invention relates to holographic image rendering, and more specifically, to a method of rendering holographic images required for holographic printing on a hogel basis.
  • an image is obtained in an inclined orthogonal projection format and then finally converted to a perspective view through pixel rearrangement to obtain an image for hologram printing.
  • this method is inefficient in obtaining images for hologram printing because as the number of hogels of the hologram printer increases or the number of viewpoints per hogel increases, it takes more time to rearrange pixels.
  • the present invention was devised to solve the above problems, and the purpose of the present invention is to provide a technology that can perform holographic image rendering for hologram printing at high speed in a simpler method.
  • a holographic image rendering method for achieving the above object includes rendering first holographic images using a first virtual camera in each hogel unit constituting the holographic image; Rendering second holographic images using a second virtual camera on a hogel basis; It includes combining the first hologram images and the second hologram images for each corresponding hosel to generate a hologram image.
  • the first virtual camera may be a virtual camera having a viewing angle in the opposite direction from the hogel to the observer.
  • the first virtual camera may be a virtual perspective camera with a wide viewing angle from Hogel.
  • the second virtual camera may be a virtual camera whose viewing angle is in the direction from the observer to the hogel.
  • the second virtual camera may be a virtual perspective camera whose viewing angle narrows as the hogel increases.
  • objects closer to Hogel may appear larger than objects farther from Hogel.
  • the generation step may be to rotate the second hologram image by 180 degrees about each of the horizontal and vertical axes and then create a hologram image by overlapping it on the first hologram images.
  • the holographic image rendering method according to the present invention may further include the step of dividing the holographic image generated in the generation step into individual hogels, restoring the image, and then printing it on a holographic film.
  • first holographic images are rendered using a first virtual camera in each hogel unit constituting the holographic image
  • second holographic images are rendered using a second virtual camera in each hogel unit
  • a processor that combines first hologram images and second hologram images for each corresponding hogel to generate a hologram image
  • a storage unit that provides storage space necessary for the processor.
  • first holographic images rendered using a first virtual camera in hogel units constituting the holographic image and second holographic images rendered using a second virtual camera in hogel units correspond to Combining each hogel to generate a hologram image;
  • a hologram printing method is provided, including the step of dividing the hologram image generated in the generation step into individual hogels, restoring the image, and then printing it on a hologram film.
  • first holographic images rendered using a first virtual camera in hogel units constituting the holographic image and second holographic images rendered using a second virtual camera in hogel units correspond to A rendering system that combines each hogel to create a holographic image;
  • a hologram printing system is provided that includes a hologram printer that divides and restores the hologram image generated in the generation step for each hogel and then prints it on a hologram film.
  • holographic images of the -depth view and +depth view are generated and combined using two cameras for each hogel, thereby generating holographic images of the perspective view without pixel rearrangement.
  • the rendering method is simplified, making it possible to create images for large-area hologram printing in a shorter time, ultimately shortening the time required for hologram printing, and ultimately enabling the use of hologram printers. This could be of great help in commercialization.
  • Figure 2 shows a holographic image rendering method for hologram printing according to an embodiment of the present invention
  • Figure 3 shows a method of rendering holographic images at -depth perspective
  • Figure 4 shows a method of rendering holographic images at +depth view
  • Figure 5 shows a method of generating a hologram image by combining hologram images at -depth view and +depth view for each hogel
  • FIG. 6 shows a hologram printing system according to another embodiment of the present invention.
  • Figure 7 is the rendering system shown in Figure 6.
  • Figure 2 is a flowchart provided to explain a holographic image rendering method for hologram printing according to an embodiment of the present invention.
  • the holographic image rendering method according to an embodiment of the present invention was conceived from the point that the image resulting from rearranging pixels according to the existing rendering method is similar to perspective projection rendering.
  • a hologram image at a -depth view and a hologram image at a +depth view are generated and combined using two on-board cameras per hogel, thereby generating a hologram image at a perspective view without pixel rearrangement.
  • Figure 3 shows a method of rendering holographic images at -depth view.
  • -depth viewpoint refers to the viewpoint looking from Hogel in the opposite direction of the observer.
  • the illustrated virtual cameras have a viewing angle in the opposite direction from the Hogel to the observer, that is, they have a viewing angle that is the same as the viewing angle of the hologram printer.
  • the virtual cameras that render the -depth viewpoint are virtual perspective cameras whose viewing angle widens from Hogel. Therefore, in holographic images, objects close to Hogel appear large and objects far from Hogel appear small.
  • the center of each hogel is the center point of the lens of each virtual camera.
  • holographic image rendering at -depth perspective is performed by perspective projection rendering in units of hogels constituting the holographic image.
  • a hologram image from viewpoint A is generated by camera A
  • a hologram image from viewpoint B is generated by camera B
  • a hologram image from viewpoint C is generated by camera C
  • a hologram image from viewpoint F is generated by camera F, respectively. It is rendered.
  • FIG. 4 shows a method of rendering holographic images at +depth view.
  • the +depth viewpoint refers to the viewpoint looking from the observer toward the hogel.
  • the illustrated virtual cameras are virtual cameras whose viewing angle is in the direction from the observer toward the hogel.
  • the virtual cameras that render the +depth viewpoint are virtual perspective cameras with the camera matrix adjusted so that the viewing angle narrows as the hogel increases. Therefore, in holographic images, objects close to Hogel appear large and objects far from Hogel, that is, objects close to the observer, appear small.
  • the center of each hogel is the point where the viewing angle of each virtual camera decreases to become a point.
  • holographic image rendering at the +depth viewpoint is also performed in hogel units constituting the holographic image. That is, a hologram image from viewpoint A is generated by camera A, a hologram image from viewpoint B is generated by camera B, a hologram image from viewpoint C is generated by camera C, ..., a hologram image from viewpoint F is generated by camera F, respectively. It is rendered.
  • hologram images at +depth are rendered in png format, and areas where objects do not exist are displayed in transparent color rather than black.
  • Hologram images at the +depth viewpoint must be placed on top of hologram images at the -depth viewpoint. This is to prevent the hologram images at the -depth viewpoint from being obscured by the backgrounds of the hologram images at the +depth viewpoint.
  • a hologram image is generated by overlapping the hologram images at the +depth viewpoint generated at step S120 on the hologram images at the -depth viewpoint generated at step S110 in each hogel unit (S130).
  • Figure 5 schematically shows a method of generating a hologram image by combining hologram images at a -depth view and hologram images at a +depth view for each corresponding hogel.
  • holographic images at +depth must be rotated by 180 degrees on each of the horizontal and vertical axes. That is, the hologram images at the -depth view are overlapped with the rotated hologram images at the +depth view.
  • Figure 6 is a diagram showing the configuration of a hologram printing system according to another embodiment of the present invention.
  • the hologram printing system according to an embodiment of the present invention includes a rendering system 200 and a hologram printer 300.
  • the rendering system 200 is a system that renders a holographic image for holographic printing according to the holographic image rendering method shown in FIG. 2 described above.
  • the hologram printer 300 restores the hologram image rendered by the rendering system 200 in hogel units and prints it on a hologram film.
  • FIG. 7 is a diagram illustrating the configuration of the rendering system 200 shown in FIG. 6.
  • the rendering system 200 according to an embodiment of the present invention includes a communication unit 210, an output unit 220, a processor 230, an input unit 240, and a storage unit 250. It can be implemented with a computing system.
  • the communication unit 210 is a communication means for communicating with external devices and connecting to an external network, the output unit 220 displays the execution results of the processor 230, and the input unit 240 transmits user commands to the processor 230. Deliver.
  • the communication unit 210 communicates with the hologram printer 300.
  • the processor 230 sequentially performs the procedures of the method shown in FIG. 2 to render a hologram image for hologram printing.
  • the storage unit 250 provides storage space necessary for the processor 230 to function and operate.
  • two card cameras were used for each hogel to generate and combine a holographic image at a -depth viewpoint and a holographic image at a +depth viewpoint, thereby enabling the creation of holographic images at a far and near viewpoint without pixel rearrangement.
  • This simplification of the rendering method shortens the image creation time for large-area hologram printing, and ultimately shortens the time required for hologram printing of desired content, ultimately helping to commercialize hologram printers. can be expected to be
  • a computer-readable recording medium can be any data storage device that can be read by a computer and store data.
  • computer-readable recording media can be ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk, hard disk drive, etc.
  • computer-readable codes or programs stored on a computer-readable recording medium may be transmitted through a network connected between computers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computing Systems (AREA)
  • Geometry (AREA)
  • Computer Graphics (AREA)
  • Holo Graphy (AREA)

Abstract

La présente invention concerne un procédé de rendu d'image holographique pour impression qui ne nécessite pas de réagencement. Selon des modes de réalisation de la présente invention, le procédé de rendu d'image holographique consiste à générer des images holographiques avec un point de vue à profondeur négative (-profondeur) et avec un point de vue à profondeur positive (+profondeur) en utilisant deux caméras virtuelles par hogel, et à combiner les images holographiques de façon à générer une image holographique avec un point de vue en perspective sans réagencement de pixels. Par conséquent, le procédé de rendu est simplifié, ce qui permet de générer plus rapidement des images pour l'impression holographique grande surface, réduisant ainsi le temps requis pour l'impression holographique.
PCT/KR2023/017115 2022-11-28 2023-10-31 Procédé de rendu d'image holographique pour impression qui ne nécessite pas de réagencement Ceased WO2024117556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0161069 2022-11-28
KR1020220161069A KR102710193B1 (ko) 2022-11-28 2022-11-28 재배치가 필요 없는 홀로그램 프린팅용 홀로그램 이미지 렌더링 방법

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WO2024117556A1 true WO2024117556A1 (fr) 2024-06-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366370B1 (en) * 1998-12-30 2002-04-02 Zebra Imaging, Inc. Rendering methods for full parallax autostereoscopic displays
CN110069006A (zh) * 2019-04-30 2019-07-30 中国人民解放军陆军装甲兵学院 一种全息体视图合成视差图像生成方法及系统
KR20220077344A (ko) * 2020-12-02 2022-06-09 한국전자기술연구원 겹쳐 찍기를 이용한 홀로그램 프린팅 방법 및 장치
KR20220093472A (ko) * 2020-12-28 2022-07-05 한국전자기술연구원 홀로그래픽 프린터를 위한 3차원 영상 렌더링 방법
KR20220096700A (ko) * 2020-12-31 2022-07-07 한국과학기술연구원 임의 시점 영상 생성 기술을 이용한 다이나믹 영상 촬영 장치 및 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6366370B1 (en) * 1998-12-30 2002-04-02 Zebra Imaging, Inc. Rendering methods for full parallax autostereoscopic displays
CN110069006A (zh) * 2019-04-30 2019-07-30 中国人民解放军陆军装甲兵学院 一种全息体视图合成视差图像生成方法及系统
KR20220077344A (ko) * 2020-12-02 2022-06-09 한국전자기술연구원 겹쳐 찍기를 이용한 홀로그램 프린팅 방법 및 장치
KR20220093472A (ko) * 2020-12-28 2022-07-05 한국전자기술연구원 홀로그래픽 프린터를 위한 3차원 영상 렌더링 방법
KR20220096700A (ko) * 2020-12-31 2022-07-07 한국과학기술연구원 임의 시점 영상 생성 기술을 이용한 다이나믹 영상 촬영 장치 및 방법

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KR102710193B1 (ko) 2024-09-26

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