WO2016190472A1 - Dispositif et procédé de production d'image de réalité augmentée à l'aide d'incrustation de couleur - Google Patents

Dispositif et procédé de production d'image de réalité augmentée à l'aide d'incrustation de couleur Download PDF

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Publication number
WO2016190472A1
WO2016190472A1 PCT/KR2015/005443 KR2015005443W WO2016190472A1 WO 2016190472 A1 WO2016190472 A1 WO 2016190472A1 KR 2015005443 W KR2015005443 W KR 2015005443W WO 2016190472 A1 WO2016190472 A1 WO 2016190472A1
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image
augmented reality
chroma key
buffer
content
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PCT/KR2015/005443
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English (en)
Korean (ko)
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박수왕
김동욱
송성환
이봉규
Original Assignee
(주)소셜네트워크
제주대학교 산학협력단
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Publication of WO2016190472A1 publication Critical patent/WO2016190472A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T19/00—Manipulating 3D models or images for computer graphics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring

Definitions

  • the present invention relates to an apparatus and method for producing augmented reality image using chroma key, and more particularly, to an apparatus and method for producing augmented reality image using chroma key that can reduce inconsistency of virtual and augmentation according to chroma key. .
  • a chroma key technique refers to a technique of generating a single image by combining an image of a subject in a virtual space with a preset background image or image.
  • the chroma key is used for image synthesis, and a specific color is designated as a key, and then a pixel corresponding to a key in the main image is replaced with another image.
  • the chroma key When the chroma key is applied to the augmented reality, content modification such as the position shift of the content synthesized by the augmented reality by the chroma key technique occurs in real time according to a user action or a feature point of the input image. At this time, the alpha channel is synthesized to cover the unnaturalness due to the deformation of the content.
  • the existing augmented reality chroma key scheme synthesizes the pre-prepared color channel and the alpha channel as shown in Figure 1a, 1b in real time causes a synchronization problem.
  • a synchronization problem occurs, as shown in FIG.
  • twice the space the space occupied by the color channel and the alpha channel
  • One aspect of the present invention generates an augmented reality content image including an alpha channel before synthesizing a content image including a virtual object in a live image, and outputs the synthesized live image to a pre-generated augmented reality content image
  • An apparatus and method for producing augmented reality video using a chroma key is provided.
  • a method for producing an augmented reality image using a chroma key by removing a background region of a pre-produced content image using a chroma key technique, and using a color channel and an alpha for the content image from which the background region is removed. Extracting a channel, synthesizing the color channel and the alpha channel to generate an augmented reality content image, and if a live image is input through a pre-set camera, the augmented reality is synthesized by synthesizing the live image to the augmented reality content image Create a chroma key image.
  • Extracting the color channel and the alpha channel of the content image from which the background region has been removed includes separating the content image from which the background region has been removed into a plurality of still images, and the color channel and alpha channel of each of the separated still images. Can be extracted.
  • the generating of the augmented reality content image comprises: generating a plurality of combined still images by synthesizing a color channel and an alpha channel for each separated still image of the content image from which the background region is removed, and generating the plurality of combined still images. You can arrange the images to create an image sequence.
  • the method may further include performing rendering on each combined still image included in the image sequence.
  • the rendered combined still image corresponding to the size of the buffer provided in advance in the augmented reality image production apparatus is extracted from the image sequence to the buffer. It may further comprise loading.
  • Generating the augmented reality chroma key image if the rendered combined still image corresponding to the size of the buffer is loaded into the buffer and the live image is input, the loaded, rendered combined An augmented reality chroma key image may be generated by combining the still image and the live image.
  • the position or size of each augmented reality content included in the loaded combined still image is changed according to the received composition position or size information, and the position Or generating the augmented reality chroma key image by synthesizing the live image with each of the loaded and rendered combined still images of which the size is changed.
  • the difference between the last combined still image number loaded in the buffer and the frame number currently being output is calculated so that the augmented reality image is continuously output, and whether the image size corresponding to the difference is less than the size of the buffer.
  • the method may further include extracting and loading the rendered combined still image corresponding to the calculated difference from the image sequence when the image size corresponding to the calculated difference is less than the size of the buffer. have.
  • An apparatus for producing augmented reality video using a chroma key includes an input unit for receiving a pre-produced content image, a background region of the content image is removed by applying a chroma key to the content image, and the background A live image is input through an augmented reality control unit and a pre-equipped camera which extracts a color channel and an alpha channel of a content image from which an area is removed and controls the synthesis of the color channel and the alpha channel to generate an augmented reality content image.
  • a chroma key controller configured to generate the augmented reality chroma key image by synthesizing the live image with the augmented reality content image.
  • the extracting of the color channel and the alpha channel of the content image from which the background region has been removed by the augmented reality controller divides the content image from which the background region has been removed into a plurality of still images, and extracts each of the still images. You can extract color and alpha channels.
  • the generating of the augmented reality content image by the augmented reality controller may include generating a plurality of combined still images by synthesizing a color channel and an alpha channel for each of the separated still images of the content image from which the background region is removed,
  • the sequence of images may be generated by arranging the plurality of combined still images.
  • the augmented reality controller may further include performing rendering on each of the combined still images included in the image sequence.
  • the augmented reality control unit when the augmented reality image output signal is input by the user to extract the rendered combined still image corresponding to the size of the buffer provided in the augmented reality image production apparatus in advance in the image sequence to load into the buffer It may further include.
  • the chroma key controller is configured to load the rendered combined still image corresponding to the size of the buffer to the buffer by the augmented reality controller and to load the live image when the live image is input.
  • the combined still image and the live image may be synthesized to generate an augmented reality chroma key image, and the augmented reality chroma key image may be output through an output unit provided in the augmented reality image producing apparatus.
  • the chroma key controller when the composition position or size information of the content for augmented reality is received from the augmented reality control unit, each augmented reality included in the loaded combined still image according to the received composition position or size information And changing the position or size of the dragon content and synthesizing the live image with each of the loaded and rendered combined still images whose position or size is changed to generate the augmented reality chroma key image.
  • the augmented reality controller calculates a difference between the last combined still image number loaded in the buffer and a frame number currently being output so that the augmented reality image can be continuously output, and the image size corresponding to the calculated difference is Check whether the size of the buffer is smaller than the size of the buffer; and extract and render the rendered combined still image corresponding to the calculated difference in the image sequence if the size of the image corresponding to the calculated difference is less than the size of the buffer. It may further include doing.
  • the augmented reality content image including the alpha channel is prepared in advance, and then the live image by synthesizing the augmented reality chroma key image by solving the synchronization problem by the alpha channel synthesis can be solved.
  • the additional storage space for alpha channel synthesis can be used to save storage space.
  • 1A, 1B and 1C are diagrams for explaining a conventional alpha channel synthesis method.
  • FIG. 2 is a block diagram of an apparatus for producing augmented reality image using chroma key according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an image in which a color channel and an alpha channel are synthesized.
  • FIG. 4 is a diagram illustrating a sequence of images synthesized in FIG. 3.
  • FIG. 5 is a flowchart illustrating a method of generating an augmented reality content image in the augmented reality image production method according to an embodiment of the present invention.
  • FIG. 6 is a detailed flowchart illustrating a method of loading an augmented reality content image into a buffer in FIG. 5.
  • FIG. 7 is a flowchart illustrating a method of generating and outputting an augmented reality chroma key image in the augmented reality image production method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart illustrating a method of loading an augmented reality content image into a buffer during augmented reality chroma key image reproduction.
  • FIG. 2 is a block diagram of an apparatus for producing augmented reality video using a chroma key according to an embodiment of the present invention
  • FIG. 3 is a view showing an image in which a color channel and an alpha channel are synthesized
  • FIG. 4 is synthesized in FIG. A diagram showing a sequence of captured images.
  • An augmented reality video production apparatus (hereinafter referred to as an augmented reality video production apparatus) using a chroma key according to an embodiment of the present invention, in order to solve the synchronization problem according to the alpha channel synthesis, and pre-produce the content image synthesized alpha channel
  • augmented reality image may be produced and output by synthesizing a pre-produced content image of an alpha channel synthesized with a live image captured in real time through a camera.
  • the apparatus for producing augmented reality images 1 may include an input unit 100, an interface unit 200, a control unit 300, an output unit 400, and a memory unit 500. It may include.
  • the input unit 100 may receive information necessary for producing an augmented reality image.
  • the input unit 100 may include a camera unit 110 and a sensor unit 120.
  • the camera unit 110 may capture a real environment image, that is, a live image, to be synthesized with the augmented reality image.
  • the camera unit 110 may transmit the captured live image to the controller 300.
  • the sensor unit 120 may sense information about an external environment. For example, the sensor unit 120 may detect a user's movement and may sense a change in the position of the augmented reality image production apparatus 1 by the user. The sensor unit 120 may transmit information about the sensed environment to the controller 300.
  • the interface unit 200 may detect an input signal input from a user.
  • the interface unit 200 serves as an interface with all external devices connected to the augmented reality image production apparatus 1. For example, wired / wireless headset ports, external rechargeable battery ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, video I / O (Input / Output) port, earphone port, etc. may be included.
  • the interface unit 200 may receive input information input from a user or input information from a connected external device and transmit the input information to the controller 300.
  • the controller 300 may generate an augmented reality content image synthesized with an alpha channel integrally, generate an augmented reality chroma key image by synthesizing the generated augmented reality content image with a live image, and generate the augmented reality chroma.
  • the chroma key image may be loaded into a buffer so that the marquee image may be output without interruption through the output unit 400.
  • the controller 300 may include an augmented reality controller 310 and a chroma key controller 320.
  • the augmented reality controller 310 may generate an augmented reality content image for synthesizing the augmented reality image.
  • the augmented reality controller 310 may receive a content image including content to be synthesized from the augmented reality image from the input unit 100, the interface unit 200, or the memory unit 500.
  • the augmented reality controller 310 may remove the background region from the content image by using a chroma key technique.
  • the live image may be synthesized by the chroma key controller 320 in the background region removed from the content image.
  • the augmented reality content image may change the content, such as changing the position of the content image, change the size of the content image by the user's action or the real-time position movement of the input image by the feature point.
  • an alpha channel corresponding to the content image may be synthesized.
  • a conventional augmented reality image production apparatus synthesizes an alpha channel in real time, so a synchronization problem may occur.
  • the augmented reality control unit 310 synthesizes an alpha channel in advance to the content image so that a synchronization problem according to the alpha channel does not occur when the augmented reality chroma key image is output. Create a content image.
  • the augmented reality controller 310 may separate the content image from which the background area is removed into a plurality of still images.
  • the augmented reality controller 310 may extract a color channel and an alpha channel for each still image of the content image.
  • the augmented reality controller 310 may generate one combined still image by synthesizing the extracted color channel and the alpha channel integrally as shown in FIG. 3.
  • the combined still image in which the color channel and the alpha channel are integrally synthesized may be formed in a PNG file format.
  • the augmented reality controller 310 may generate an image sequence by arranging a plurality of combined still images obtained by combining a color channel and an alpha channel, as shown in FIG. 4. In this case, since the image refers to a continuous still image, the image sequence itself may be an augmented reality content image.
  • the augmented reality controller 310 may control the rendering of a plurality of combined still images included in the image sequence by transferring the generated image sequence to a renderer.
  • the augmented reality controller 310 may receive an augmented reality image output signal through the input unit 100 or the interface unit 200. When the augmented reality image output signal is received, the augmented reality controller 310 may load a combined still image included in the image sequence into a buffer provided in the output unit 400 in advance. At this time, the augmented reality controller 310 may check the size of the buffer. The augmented reality controller 310 may calculate the number of combined still images corresponding to the size of the identified buffer. The augmented reality controller 310 may extract a combined still image corresponding to the number of combined still images corresponding to the size of the buffer in the image sequence. In this case, extracting the combined still image from the image sequence may be sequentially performed according to the order in which the image is arranged in the image sequence. The augmented reality controller 310 may load the extracted combined still image into the buffer.
  • the augmented reality controller 310 stops combining the next output sequence while the combined still image loaded in the buffer is combined with the live image by the chroma key controller 320 so that the augmented reality chroma key image can be continuously output. You can load an image into a buffer.
  • the augmented reality controller 310 may receive timing information from the renderer.
  • the timing information may include output timing information of a frame to be reproduced.
  • the augmented reality controller 310 may calculate a current frame number to be reproduced using the received timing information.
  • the current sound number may be calculated together with the current frame number.
  • the augmented reality controller 310 may check whether the current frame number is less than the total frame number to check whether all the combined still images included in the current image sequence are output. In this case, the total frame number may mean the total number of frames.
  • the augmented reality controller 310 may determine whether a combined still image corresponding to the current frame is loaded in the buffer. If the combined still image corresponding to the current frame is not loaded, the augmented reality controller 310 may extract an image corresponding to the current frame from the image sequence and load the image into the buffer. The augmented reality controller 310 loads the image corresponding to the current frame, and then the difference between the number of the last image loaded in the buffer and the current frame number for efficient loading ( ) Can be calculated.
  • the augmented reality control unit 310 calculates the difference between the current frame number and the number of the last image loaded into the buffer. ) Can be calculated the size of the image.
  • the augmented reality control unit 310 is a difference between the number of the last image loaded in the buffer and the current frame number ( ), You can check whether the image size is smaller than the buffer size. At this time, the difference between the number of the last image loaded into the buffer and the current frame number ( If the size of the image is smaller than the size of the buffer, it is determined that there are fewer images loaded in the buffer than the number of images that can be loaded in the current buffer.
  • the difference between the number of the last image loaded in and the current frame number ( ) Can be extracted from the image sequence.
  • the augmented reality controller 310 may load the extracted combined still image into the buffer.
  • the augmented reality controller 310 may determine whether the loaded combined still image is synthesized with the live image by the chroma key controller 320 and output, and whether the current frame number matches the entire frame number.
  • the augmented reality controller 310 may recognize that all combined still images included in the image sequence are output when the current frame number and the entire frame number match, and initialize the control of the image sequence. In this case, initializing may mean setting the number of the current frame to 0 or not loading an image into the buffer.
  • the augmented reality controller 310 may analyze an input image input by the input unit 100 and detect a region to which content is synthesized in the input image. For example, if a person exists in the input image, a portion indicated by the hand of the person may be an area to synthesize the content. The augmented reality controller 310 may track the position and size of the region where the content is to be synthesized in the input image. The augmented reality controller 310 may transmit the tracking information of the region where the tracked content is to be synthesized to the chroma key controller 320. In this case, the tracking information may include location information or size information of the region where the content according to the frame flow is to be synthesized.
  • the chroma key controller 320 may generate an augmented reality chroma key image by synthesizing the combined still image and the live image loaded in the buffer by the augmented reality controller 310. have.
  • the chroma key controller 320 may synthesize the live image in the background region of each combined still image loaded in the buffer.
  • the background region of the combined still image is a portion removed by the chroma key technique from the augmented reality controller 310 to set a corresponding region as a key to synthesize a live image.
  • the chroma key controller 320 may convert the augmented reality content image according to the tracking information, and synthesize and output a live image to the converted augmented reality content image. have.
  • the tracking information may include the composition position and size information of the content according to the frame flow.
  • the chroma key controller 320 may change the content included in the combined still image according to the received tracking information for each combined still image loaded in the buffer. In this case, the chroma key controller 320 may transform each combined still image to correspond to content position or size information according to time included in the tracking information.
  • the chroma key controller 320 detects a combined still image corresponding to each frame included in the tracking information and includes the detected still image in the detected combined still image.
  • the controlled content may be controlled to be changed according to corresponding tracking information.
  • the output unit 400 may output an augmented reality chroma key image generated by the chroma key controller 320.
  • the output unit 400 may output an image on a screen provided in advance in the augmented reality image production apparatus 1, and may output an image to another display device connected to the augmented reality image production apparatus 1.
  • the output unit 400 may further include a speaker. If the sound information is previously matched with the augmented reality chroma key image to be output, the output unit 400 may output the corresponding sound and output the matched sound.
  • the memory unit 500 may store information necessary for overall control of the controller 300.
  • the memory unit 500 may store a plurality of content images synthesized in the augmented reality image to produce an augmented reality image.
  • the memory unit 500 may temporarily store the augmented reality content image generated by the augmented reality controller 310.
  • a content image is input from the input unit 100, the interface unit 200, or the memory unit 500 (610), and the input content image is divided into a plurality of still images (620).
  • separating the input content image into a plurality of still images may mean separating the plurality of still images constituting the content image in the order of configuring the content image.
  • a color channel and an alpha channel of each of the separated still images are extracted (630).
  • a plurality of combined still images are generated by synthesizing the color channel and the alpha channel extracted from each still image of the content image (640).
  • the generation of the combined still image including the alpha channel may cause a synchronization problem when the alpha channel is synthesized in real time during the production of the augmented reality image, so that the alpha channel is synthesized in advance to fundamentally block the synchronization problem. It is to create a content image.
  • An image sequence is generated by arranging the plurality of combined still images generated (650), and the rendered image sequence is transmitted to the renderer to perform rendering on each of the combined still images included in the generated image sequence.
  • An image is generated (660).
  • the augmented reality control unit 310 may load the augmented reality content image to the buffer for seamless image output.
  • the number of combined still images corresponding to the size of the buffer is calculated to determine the number of images that can be loaded into the buffer (681).
  • the combined still images corresponding to the number of combined still images calculated from the image sequence are extracted (682).
  • extracting the combined still image from the image sequence may extract the combined still image in order according to the order in which the image sequence is aligned.
  • the extracted combined still image is loaded into the buffer (683).
  • FIG. 7 is a flowchart illustrating a method of generating and outputting an augmented reality chroma key image in the augmented reality image production method according to an embodiment of the present invention.
  • the augmented reality controller 310 When the combined still image is loaded into the buffer by the augmented reality controller 310, it is determined whether a live image is input through the input unit 100 (710).
  • the output unit 400 outputs the augmented reality chroma key image. Output through (730).
  • FIG. 8 is a flowchart illustrating a method of loading an augmented reality content image into a buffer during augmented reality chroma key image reproduction.
  • the augmented reality image producing apparatus 1 loads the combined still image corresponding to the size of the buffer into the buffer and the remaining combined still image in the buffer for seamless playback while playing. Can be loaded serially.
  • the output unit 400 checks whether an augmented reality chroma key image is being played (810), and if it is currently playing, receives timing information from the renderer (815).
  • the renderer receives the augmented reality content image by the augmented reality controller 310 when the augmented reality content image is produced and renders the received augmented reality content image to perform timing information on the augmented reality content image. Can be obtained.
  • the current frame number to be reproduced is calculated using the received timing information (820).
  • the current sound number may be calculated together with the current frame number.
  • the total frame number may mean the total number of frames.
  • the current frame number exceeds the total frame number does not occur, so it is excluded.
  • the image corresponding to the current frame is extracted from the image sequence and loaded into the buffer (835).
  • the difference between the number of the last image loaded into the buffer and the current frame number (Check whether the size of the corresponding image is less than the size of the buffer (845), and the difference between the number of the last image loaded into the buffer and the current frame number ( If the size of the image is less than the size of the buffer, it is recognized that there are fewer images loaded in the buffer than the number of images that can be loaded in the current buffer. Difference( The combined still image corresponding to the C) is extracted from the image sequence and loaded into the buffer (850).
  • the difference between the number of the last image loaded into the buffer and the current frame number ( If the size of the image corresponds to the size of the buffer, the current buffer is recognized as full and the process returns to step 840.
  • the combined still image loaded in the buffer is synthesized with the live image by the chroma key controller 320 and output.
  • the combined still image output is deleted from the buffer so that the current frame number is changed.
  • the difference between the image number and the current frame number ( ) Changes over time, so the difference between the current frame number and the number of the last image ), You can load the image into the buffer by checking whether the image size is less than the size of the buffer.
  • initializing may mean setting the number of the current frame to 0 or not loading an image into the buffer.
  • Such a technique for producing an augmented reality image using a chroma key may be implemented in the form of program instructions that may be implemented as an application or executed through various computer components, and recorded on a computer readable recording medium.
  • the computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the computer-readable recording medium are those specially designed and configured for the present invention, and may be known and available to those skilled in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device may be configured to operate as one or more software modules to perform the process according to the invention, and vice versa.

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Abstract

La présente invention concerne un dispositif et un procédé de production d'une image de réalité augmentée à l'aide d'incrustation de couleur. Le dispositif de production d'une image de réalité augmentée à l'aide d'incrustation de couleur produit une image de contenu de réalité augmentée comprenant un canal alpha avant de synthétiser une image de contenu comprenant un objet virtuel dans une image en direct, il synthétise l'image en direct dans l'image de contenu de réalité augmentée produite précédemment et délivre en sortie l'image synthétisée. Par conséquent, un problème de synchronisation dû à une synthèse de canal alpha peut être résolu.
PCT/KR2015/005443 2015-05-28 2015-05-29 Dispositif et procédé de production d'image de réalité augmentée à l'aide d'incrustation de couleur WO2016190472A1 (fr)

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WO2020080608A1 (fr) * 2018-10-19 2020-04-23 주식회사 산타 Appareil et procédé destinés à la synthèse d'incrustation de couleur
WO2020201764A1 (fr) * 2019-04-05 2020-10-08 Holome Technologies Limited Procédé et appareil de génération d'images tridimensionnelles
CN115086704A (zh) * 2022-08-19 2022-09-20 广州市千钧网络科技有限公司 一种直播中视频图像合成的方法、装置及存储介质

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KR101944358B1 (ko) 2017-05-26 2019-02-01 강다겸 웹기반 실시간 분산 스트리밍 및 크로마키 영상처리 시스템 및 방법
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