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Researchers Submit Patent Application, "Apparatus and Method for Calibrating Multi-Layer Three-Dimensional (3d) Display", for Approval

June 18, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors LI, Weiming (Beijing, CN); ZHOU, Mingcai (Beijing, CN); JIAO, Shaohui (Beijing, CN); HONG, Tao (Beijing, CN); WANG, Haitao (Beijing, CN); KIM, Ji Yeun (Seoul, KR), filed on October 21, 2013, was made available online on June 5, 2014.

The patent's assignee is Samsung Electronics Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "One or more example embodiments relate to three-dimensional (3D) display technology, and more particularly, to an apparatus and method for calibrating a multi-layer 3D display (MLD).

"Recently, a multi-layer three-dimensional (3D) display (MLD) is receiving attention in a field of 3D displays. In general, the MLD may be formed by a plurality of two-dimensional (2D) display layers laminated in a direction of thickness to produce 3D visual effects. The MLD containing various operating principles may include a depth fusion display (DFD), a parallax barrier, a light field recreation (LFR), and the like."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "The foregoing and/or other aspects are achieved by providing an apparatus and method for calibrating a multi-layer three-dimensional (3D) display (MLD) that may detect a position error between display layers of the MLD. Calibration refers to a method of obtaining geometric relations between display layers in a display including a plurality of display layers.

"The foregoing and/or other aspects are achieved by providing a method of calibrating a 3D display including a plurality of display layers, the method including controlling the 3D display to display a first image on a single display layer, acquiring a second image by controlling an image capturer to capture the displayed first image, calculating a homography between the single display layer and the image capturer, based on the first image and the second image, and calculating geometric relations of the single display layer with respect to the image capturer, based on the calculated homography. In this example, geometric relations among the plurality of display layers may be obtained based on geometric relations of each of the plurality of display layers with respect to the image capturer, by performing the controlling, the acquiring, the calculating of the homography, and the calculating of the geometric relations for each of the plurality of display layers of the 3D display.

"The acquiring may include acquiring the second image by controlling the image capturer to capture a portion of the displayed first image or the entire displayed first image.

"The calculating of the homography may include extracting, from the first image, first coordinates at which a preset point is positioned in the first image, extracting, from the second image, second coordinates at which the preset point is positioned in the second image, and calculating a homography matrix between the first image and the second image, based on the first coordinates and the second coordinates.

"The calculating of the geometric relations may include extracting a shift vector and a rotation matrix between the single display layer and the image capturer from the homography matrix, using an internal parameter matrix of the image capturer. When the acquiring is performed for each of the plurality of display layers of the 3D display, a position and an operation of the image capturer may be the same.

"The method may further include correcting positions of the plurality of display layers, based on the geometric relations among the plurality of display layers. In addition, the method may further include adjusting a display render parameter of the 3D display, based on the geometric relations among the plurality of display layers.

"The foregoing and/or other aspects are achieved by providing an apparatus for calibrating a 3D display including a plurality of display layers, the apparatus including a communication unit to communicate with the 3D display, a display controller to control, through the communication unit, the 3D display to display a first image on each of the plurality of display layers in a preset sequence, an image capturer to acquire a second image by capturing the first image displayed on each of the plurality of display layers, a homography calculator to calculate a homography between each of the plurality of display layers and the image capturer, based on the first image and the second image, and a geometric determiner to obtain geometric relations among the plurality of display layers, by calculating geometric relations of each of the plurality of display layers with respect to the image capturer, based on the calculated homography. The apparatus may further include a display unit to display the geometric relations among the plurality of display layers.

"The foregoing and/or other aspects are achieved by providing an apparatus for calibrating a 3D display including N display layers, the apparatus including a display controller to control the 3D display to display an image on a display layer of the 3D display, an image capturer to capture an image of the 3D display, and a geometric determiner to determine geometric relations of the display layer with respect to the image capturer. The display controller and the image capturer may repeat, n times, an operation of controlling the image to be displayed on an n.sup.th display layer of the 3D display, and an operation of capturing the image of the 3D display. Here, n ranges from '1' and M, and M denotes an integer less than or equal to N. The geometric determiner may determine the geometric relations of the display layer with respect to the image capturer, based on a relationship between the image displayed on the n.sup.th display layer and the image of the 3D display.

"The geometric determiner may extract, from the image displayed on the n.sup.th display layer, first coordinates at which a preset point is positioned in the image displayed on the n.sup.th display layer, extract, from the image of the 3D display, second coordinates at which the preset point is positioned in the image of the 3D display, and determine the geometric relations of the display layer with respect to the image capturer, based on the first coordinates and the second coordinates.

"The geometric determiner may calculate a homography matrix between the image displayed on the n.sup.th display layer and the image of the 3D display, based on the first coordinates and the second coordinates, and determine the geometric relations of the display layer with respect to the image capturer, based on the homography matrix.

"The example embodiments may include an apparatus and method for calibrating an MLD that may control a 3D display to display an image on each display layer, capture the displayed image, and obtain geometric relations among a plurality of display layers based on a homography between the displayed image and the captured image.

"The foregoing and/or other aspects are achieved by providing a method for calibrating a multi-layer three-dimensional display (MLD) including controlling the MLD to display a first image on a first display layer of the MLD display, acquiring a second image by controlling an image capturer to capture the first image displayed on the first layer of the MLD and calculating a homography between the first display layer and an image plane of the image capturer based on the first image and the second image.

"The foregoing and/or other aspects are achieved by providing a multi-layer three-dimensional (3D) display (MLD) including a calibrating apparatus. The MLD includes a display controller to control the MLD to display a first image on a first display layer of the MLD display, an image capturer to capture the first image displayed on the first layer of the MLD, and a homography calculator to calculate a homography between the first display layer and an image plane of the image capturer based on the first image and the second image.

"Additional aspects of embodiments will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

"These and/or other aspects will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings of which:

"FIG. 1 illustrates a method of calibrating a multi-layer three-dimensional (3D) display (MLD) according to example embodiments;

"FIG. 2 illustrates an apparatus for calibrating an MLD according to example embodiments;

"FIG. 3 illustrates a first image according to example embodiments; and

"FIG. 4 illustrates a 3D display 400 including an apparatus for calibrating the 3D display according to example embodiments."

For additional information on this patent application, see: LI, Weiming; ZHOU, Mingcai; JIAO, Shaohui; HONG, Tao; WANG, Haitao; KIM, Ji Yeun. Apparatus and Method for Calibrating Multi-Layer Three-Dimensional (3d) Display. Filed October 21, 2013 and posted June 5, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4009&p=81&f=G&l=50&d=PG01&S1=20140529.PD.&OS=PD/20140529&RS=PD/20140529

Keywords for this news article include: Samsung Electronics Co. Ltd.

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Source: Electronics Newsweekly


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