Abstract: Provided is a method of compressing an occupancy map of a three-dimensional (3D) point cloud, and more specifically, a method of compressing an occupancy map of a point cloud in which an occupancy map image of a point cloud existing in a 3D space is compressed based on a compression quality or a patch-by-patch inspection method of the occupancy map image so that compression distortion is minimized when reconstructing the compressed occupancy map image so as to remarkably improve the quality of a reconstructed occupancy map image.

Abstract: Disclosed is an encoder which receives first to third input frames included first intra period and outputs a bitstream corresponding to the third input frame. The encoder includes a motion compensation unit that generates a first reference frame corresponding to the first input frame and a second reference frame corresponding to the second input frame, a union operation unit that generates an overlap frame by performing a union operation based on the first reference frame and the second reference frame, and an inter prediction unit that generates an occupancy code by performing an inter prediction operation on the overlap frame and the third input frame. In this case, the bitstream includes the occupancy code.

Abstract: Provided is a method of compressing an occupancy map of a three-dimensional (3D) point cloud, and more specifically, a method of compressing an occupancy map of a point cloud in which an occupancy map image of a point cloud existing in a 3D space is compressed based on a compression quality or a patch-by-patch inspection method of the occupancy map image so that compression distortion is minimized when reconstructing the compressed occupancy map image so as to remarkably improve the quality of a reconstructed occupancy map image.

Abstract: There is provided a method of decoding point cloud data, the method comprising: decoding a bitstream to obtain attribute information of point cloud data, acquiring attributes of the point cloud data using the decoded attribute information and reconstructing the point cloud data using the obtained attributes, wherein the attribute information contains bit depth information of each attribute of the point cloud data.

Abstract: There is provided a scalable point cloud encoding/decoding method and apparatus. The scalable point cloud decoding method comprises: acquiring an encoded texture image, an encoded geometry image, encoded occupancy map information, and encoded auxiliary patch-info information from a bitstream; acquiring a decoded texture image for each partition using the encoded texture image; reconstructing a geometry image of at least one item selected from among the encoded geometry image, the encoded occupancy map information, and the encoded auxiliary catch-info information; and reconstructing a point cloud using the texture images for the respective partitions and the geometry image.

Abstract: In the present invention, by receiving three-dimensional spatial data for a three-dimensional object, calculating a size of an elemental fringe pattern for each depth and a maximum size of the elemental fringe pattern for the three-dimensional spatial data, dividing the entire resolution of an entire predetermined hologram into a plurality of segments based on the number of divisions of the horizontal direction and the vertical direction, expanding resolution for each segment based on a maximum size for the elemental fringe pattern size, calculating a plurality of segment unit holograms for each of the segments, and accumulating overlapping regions between the plurality of segment unit holograms to produce the entire hologram for the entire resolution, it is possible to provide a hologram generating apparatus and method which may generate a hologram having a higher resolution at a faster speed than the conventional one.

Abstract: There is provided a method of decoding point cloud data, the method comprising: decoding a bitstream to obtain attribute information of point cloud data, acquiring attributes of the point cloud data using the decoded attribute information and reconstructing the point cloud data using the obtained attributes, wherein the attribute information contains bit depth information of each attribute of the point cloud data.

Abstract: In the present invention, by receiving three-dimensional spatial data for a three-dimensional object, calculating a size of an elemental fringe pattern for each depth and a maximum size of the elemental fringe pattern for the three-dimensional spatial data, dividing the entire resolution of an entire predetermined hologram into a plurality of segments based on the number of divisions of the horizontal direction and the vertical direction, expanding resolution for each segment based on a maximum size for the elemental fringe pattern size, calculating a plurality of segment unit holograms for each of the segments, and accumulating overlapping regions between the plurality of segment unit holograms to produce the entire hologram for the entire resolution, it is possible to provide a hologram generating apparatus and method which may generate a hologram having a higher resolution at a faster speed than the conventional one.

Abstract: Provided is a method and apparatus for generating a binary hologram. More particularly, provided is a method and apparatus that may decrease or, alternatively, minimize quality degradation of a binary hologram by employing a silhouette mask of a target object to reduce or, alternatively, minimize background noise occurring around the target object to be reproduced when generating the binary hologram.

Abstract: Provided is a hologram generation method including receiving three-dimensional (3D) data information, determining a first projection position onto which the 3D data information is projected on a hologram plane corresponding to a first spatial light modulator (SLM), and a second projection position onto which the 3D data information is projected on a hologram plane corresponding to a second SLM, generating a first Fresnel zone plate (FZP) pattern corresponding to the first projection position, and determining the first FZP pattern to be an FZP pattern corresponding to the second projection position.

Abstract: Provided is a method and apparatus for generating a binary hologram. More particularly, provided is a method and apparatus that may decrease or, alternatively, minimize quality degradation of a binary hologram by employing a silhouette mask of a target object to reduce or, alternatively, minimize background noise occurring around the target object to be reproduced when generating the binary hologram.

Abstract: Provided are an image magnification apparatus and method for three-dimensional display images. A multi-view image magnification apparatus includes: a region designation detection unit for detecting detection regions corresponding to the magnification regions of three-dimensional display images from original view images; a magnification ratio determination unit for determining the magnification ratios of the magnification regions; and a partial multiplexing unit for multiplexing non-detection regions except for the detection regions of the original view images according to a predetermined resolution and multiplexing the detection regions according the resolution which is different from the resolution of the non-detection regions on the basis of the magnification ratios. The present invention can magnify the images without lowering the resolution in a three-dimensional display.

Abstract: Provided is a hologram generation method including receiving three-dimensional (3D) data information, determining a first projection position onto which the 3D data information is projected on a hologram plane corresponding to a first spatial light modulator (SLM), and a second projection position onto which the 3D data information is projected on a hologram plane corresponding to a second SLM, generating a first Fresnel zone plate (FZP) pattern corresponding to the first projection position, and determining the first FZP pattern to be an FZP pattern corresponding to the second projection position.

Abstract: Provided is a multi-view video coding/decoding method and apparatus which uses coded and decoded multi-view videos to code and decode depth information videos corresponding to the multi-view videos. The multi-view video coding method includes: controlling the scales of first and second depth information videos corresponding to a multi-view video such that the scales are equalized; and coding the second depth information video, of which the scale is controlled, by referring to the first depth information video of which the scale is controlled.

Abstract: A device for creating multi-view video contents includes a virtual view position and distribution unit that calculates a plurality of virtual views corresponding to the number of predetermined virtual views based on input information and distributes the calculated positions of the plurality of virtual views to a plurality of view synthesis processing units; a view synthesis processor that operates the plurality of view synthesis processing units in parallel, allows each of the view synthesis processing units to create at least one virtual view video corresponding to a position of at least one virtual view distributed from the virtual view position calculation and distribution unit, and performs partial multiplexing based on at least one created virtual view video; and a video integration unit that integrates a plurality of partially multiplexed videos output from the plurality of view synthesis processing units.

Abstract: An apparatus and method for measuring and evaluating a field of view (FOV) that measures an FOV of a reconstructed image of a hologram, and evaluates a quality of the reconstructed image of the hologram is provided, the apparatus configured to photograph an optically reconstructed hologram image based on an integral imaging scheme to obtain an integral image, measure FOV information using the integral image, calculate FOV information of a source based on three-dimensional (3D) stereoscopic information used in the optical reconstruction of the hologram image, and evaluate an FOV reconstruction quality of the hologram image.

Abstract: Disclosed are a method and apparatus for generating a hologram based on a multi-view image. The method of generating a hologram image may include receiving a multi-view image and calculating depth information about an image at each view of the multi-view image, calculating an integrated 3-D space datum based on the multi-view image and the pieces of depth information, and generating hologram information from the integrated 3-D space datum. Accordingly, a natural 3-D image can be played because a 3-D image corresponding to an observer view is reproduced without a process of generating in-between view images and pieces of corresponding depth information when the observer moves.

Abstract: Disclosed are an apparatus and a method for generating a digital hologram for reproducing a 3D stereoscopic image, and more particularly, an apparatus and a method for generating a digital hologram, which generate the digital hologram by receiving a depth information pre-processing process of generating first depth map information constituted by a first depth level and second depth map information constituted a second depth level by receiving color image information from an imaging unit.

Abstract: Method and device for generating a multi-viewpoint image are provided. The method of generating a multi-viewpoint image includes the steps of: acquiring at least one reference-viewpoint image; generating unit image information of a virtual-viewpoint image on the basis of unit image information of the reference-viewpoint image; multiplexing the unit image information of the reference-viewpoint image and the unit image information of the virtual-viewpoint image; and generating a multi-viewpoint image by performing an interpolation process on occluded areas between the multiplexed unit image information using the multiplexed unit image information. As a result, it is possible to avoid unnecessary processes of completing and rearranging individual viewpoint images in the course of generating a multi-viewpoint image.

Abstract: Provided are an image magnification apparatus and method for three-dimensional display images. A multi-view image magnification apparatus includes: a region designation detection unit for detecting detection regions corresponding to the magnification regions of three-dimensional display images from original view images; a magnification ratio determination unit for determining the magnification ratios of the magnification regions; and a partial multiplexing unit for multiplexing non-detection regions except for the detection regions of the original view images according to a predetermined resolution and multiplexing the detection regions according the resolution which is different from the resolution of the non-detection regions on the basis of the magnification ratios. The present invention can magnify the images without lowering the resolution in a three-dimensional display.