Intervideo, Inc.

Samsung Electronics Co., Ltd.

Osong Medical Innovation Foundation, Korea University Research and Business Foundation

Korea University Industrial Academic Collaboration Foundation

Seoul National University

Corel Corporation

Chang-su Kim

Ioannis Katsavounidis

Kwang-pyo Choi

Jung-hyun Shim

Young-hun Joo

Kwan-Woong Song

Young-O Park

Lifeng Zhao

Jong Hyuk Kim

Yun-Je Oh

Masataka Hamada

Sang-ryong Kim

Sun-Gi Hong

Kazuhiko Sugimoto

Jong-hoon Won

Dong-kyung Nam

Stanley Chung

Jae-Kyun Ahn

Yong-gook Park

Chul Ho Lee

Sang-Wook Park

Moon-sik Jeong

Jeong-seok Choi

Shin-jun Lee

Yong-Deok Kim

Sang-Uk Lee

In-Kyu Park

Woo-jong Cho

Ho-joon Yoo

Jun-seong Kim

Jun-tae Lee

Jongwon Kim

Kyung-rae Kim

In-Wook Song

Young-jin Kwak

Won-dong Jang

Yeong-jun Koh

Dae-youn Lee

A method and a device for determining similarity between sequences are provided. The method includes obtaining a first sequence of frames and a second sequence of frames, determining a descriptor of a first frame of the first sequence based on luma information of blocks in the first frame, the descriptor of the first frame including luma difference information that is determined based on the luma information of the blocks in the first frame, determining a descriptor of a second frame of the second sequence based on luma information of blocks in the second frame, the descriptor of the second frame including luma difference information that is determined based on the luma information of the blocks in the second frame, and determining a similarity between the first sequence and the second sequence based on the descriptor of the first frame and the descriptor of the second frame.

Method and device for determining similarity between sequences

Provided is an apparatus for measuring a distance change, the apparatus including an information acquisition unit, an object determination unit, a feature point determination unit, an optical flow calculator, a matching point determination unit, an object length change calculator that calculates a length change ratio between an object of a first frame image and an object of a second frame image by using a feature point and a matching point, and a distance change calculator that calculates a change from a distance between a camera and the object from when the camera acquires the first frame image and when the camera acquires the second frame image using the calculated length change ratio.

Apparatus, method, and processor for measuring change in distance between a camera and an object

A method of generating a saliency image, which includes: converting an input image into an input image of the first size and an input image of the second size; applying a saliency extraction scheme to the input image of the first size to generate a first saliency image; converting the first saliency image to the second size; extracting an area that satisfies a first condition from the converted first saliency image; determining an area of the input image of the second size that corresponds to the extracted area; and generating a second saliency image by multiplying an image generated by applying the saliency extraction scheme to the determined area, and the converted first saliency image.

Method and apparatus for generating hierarchical saliency images detection with selective refinement

A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization.

Method for estimating contour of video object

A method and apparatus for estimating the contour of a user object in a moving picture during video communications so that a personal background image is not provided during video communications. Information about center coordinates as well as a size of a face of the user object is extracted from a moving picture frame. Edges are extracted from the moving picture frame, and a boundary of a head of the user object is estimated using a semicircle. The boundaries of left and right shoulders and left and right arms of the user object are estimated using second-order function graphs that overlap a largest portion of the edges. An entire contour of the user object is estimated according to the boundaries of the head, the left and right shoulders, and the left and right arms of the user object.

Method and apparatus for estimating object contour in a moving picture

Provided is a terminal and a display method used in the terminal capable of analyzing images that are mainly selected by a user from among images to be displayed by the terminal and firstly displaying the selected images, although the terminal needs to display more images than the maximum number of images that the terminal can simultaneously display, so that it is possible to reduce the inconvenience of performing a scrolling operation to select an image.

Terminal and display method used in the terminal

A method and apparatus for error concealment in decoding of a moving picture. The method includes the steps of determining an erroneous macro block in a present frame when the moving picture is decoded, finding a first macro block having a highest similarity to the erroneous macro block and a second macro block having a next highest similarity to the erroneous block in a previous frame by comparing adjacent pixels of respective blocks in the previous frame with adjacent pixels of the erroneous block in the present frame; and replacing the erroneous block by using an average between the found macro blocks having the highest similarity and the second highest similarity to thereby conceal the erroneous macro block. The apparatus includes a parser, an entropy decoder, an inverse quantizer, an inverse converter, and a concealment unit that uses motion compensation from a previous frame to correct a macro block in a current frame.

Method for error concealment in decoding of moving picture and decoding apparatus using the same

An input apparatus and method using optical masking which enable a user to intuitively manipulate a menu by mapping light sources of an optical masking sensing unit and icons displayed on a display panel to corresponding positions. The input apparatus includes a display panel displaying a plurality of icons and functions of the icons, and an optical masking sensing unit including a plurality of optical devices as light sources, turning on optical devices located at positions corresponding to positions of the displayed icons.

Input apparatus and method using optical masking

The invention is related to methods and apparatus that decode robustly encoded video bitstreams. One embodiment of a decoder can advantageously reconstruct a predictive-coded video object plane (P-VOP) from a standard motion vector and the previous frame; from a redundant motion vector and a frame prior to the previous frame; or from both. Advantageously, this permits the decoder to display a frame based on a reconstructed VOP in the presence of unfavorable environmental conditions, such as interference, delays, and the like, which could otherwise corrupt a previous frame that is used as a reference by a standard decoder, such as a standard MPEG-4 decoder. One embodiment is advantageously backwards compatible with standard MPEG-4 compliant bitstreams and retrieves redundant motion vector information from user data video packets. One embodiment includes at least one extra frame buffer or memory, which stores a reference frame corresponding to a redundant motion vector.

Systems and methods for decoding redundant motion vectors in compressed video bitstreams

When an error occurring in a terminal (device) is detected, one or more solutions for removing the detected error are displayed to a user, so that the detected error can be easily removed by the user even though the user is not familiar with operations or detailed functions of the camera.

Device having camera function including error detection and display method and medium therefor

A pointing input device and method, a pointer control device and method, and an image pattern generation device and method which move a mouse pointer displayed in a display region according to the movement of a location pointed at by the pointing input device. The pointing input device includes an image reception unit capturing an image pattern, which is displayed in a display region of a perceived size and based on which the scope of the display region is sensed, and sensing the scope of the image pattern; a coordinate extraction unit extracting coordinates of a location pointed at in the display region based on a center of the sensed scope of the image pattern; and a transmission unit transmitting the extracted coordinates to a pointer control device which controls a mouse pointer displayed in the display region.

Pointing input device, method, and system using image pattern

Provided are methods and apparatuses for encoding and decoding three-dimensional object data, which consists of point texture data, voxel data, or octree data. The method of encoding three-dimensional object data involves generating three-dimensional object data having a tree structure in which nodes are attached labels indicating their types; encoding nodes of the three-dimensional object data; and generating the three-dimensional object data whose nodes are encoded into a bitstream. The apparatus for encoding three-dimensional object data includes a tree structure generator which generates three-dimensional object data having a tree structure in which nodes are attached labels indicating their types; a merging order selector which merges the nodes of the three-dimensional object data by referring to their labels; a node encoder which encodes merged nodes; and a bitstream generator which generates the three-dimensional object data whose merged nodes are encoded into a bitstream. The method of decoding three-dimensional object data involves reading-continue flag information from a bitstream of encoded three-dimensional object data and decoding the continue flag information; decoding note type information of the bitstream; decoding an 'S' node if the note type information indicates that a current node is an 'S' node and decoding a PPM node if the note type information indicates that the current node is a PPM node; and restoring the three-dimensional object data whose nodes are encoded to a tree structure. The apparatus for decoding three-dimensional object data includes a bitstream reader which receives a bitstream of encoded three-dimensional object data; a node decoder which decodes the bitstream; and a tree structure restorer which restores decoded nodes to a tree structure.

Method and apparatus for encoding and decoding three-dimensional object data

The invention is related to methods and apparatus that recover usable video data from partially corrupted data. Embodiments inspect corrupted data packets and identify the location or locations of an error, whether the corrupted data packet contains data expected to be error-free, and whether the error-free data should be used. Decoding of a packet in both the forward direction and the backward direction can be used to locate a position of an error. Intra-coded macroblocks can also be recovered. A decoder can elect to use or to drop an intra-coded macroblock recovered from a corrupted data packet according to further criteria that is applied to the recovered intra-coded macroblock. One embodiment inspects video bitstream data that has been encoded with an optional data partitioning feature enabled, and retrieves specified data in areas of a corrupted packet that are expected to be free from error.

Systems and methods for decoding of partially corrupted reversible variable length code (RVLC) intra-coded macroblocks and partial block decoding of corrupted macroblocks in a video decoder

The invention is related to methods and apparatus that encode redundant motion vectors for predictive-coded visual object planes (P-VOPs) to increase the robustness of transmitted video signals. One embodiment provides the redundant motion vectors in a user data video packet of an MPEG-4 compliant bitstream, which thereby allows the enhanced bitstream to remain compliant with MPEG-4 syntax and backwards compatible with MPEG-4 decoders. The enhanced bitstreams allow a video decoder to display a video with a better picture and relatively less error and error propagation when portions of the bitstream are disturbed or corrupted by interference, delays, and the like.

Systems and methods for encoding redundant motion vectors in compressed video bitstreams

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Seoul, South Korea

Chang-su Kim