Abstract: Disclosed are a steel pipe for a line pipe having excellent low temperature toughness in a welded zone thereof, and a method for manufacturing the same, in which alloy components and a ratio thereof are controlled, and high frequency heat-treatment is carried out on the welded zone, and immediately thereafter, a cooling process is performed thereon in a strictly controlled manner, thereby improving the low temperature toughness of the welded zone, such that a resulting steel pipe is suitable for use in a pipeline and an offshore structure.

Abstract: A head-mounted display (HMD) may comprise: a sensor unit configured to measure the movement of a user wearing the HMD; a display unit configured to display an image; and a control unit configured to calculate the user's sightline direction from a measurement value from the sensor unit and, when the user's sightline direction satisfies a preset condition, control elements of the image other than the viewpoint using the user's sightline as a input signal. When the user's sightline direction satisfies the preset condition, the HMD controls the image, which is displayed on the HMD, using the user's sightline as an input signal, thereby performing event processing and the like without any separate controller.

Abstract: An apparatus for processing a wide viewing angle image may include: a correction parameter generating unit for analyzing an image input from a camera to generate a correction parameter, a projection geometry generating unit for generating a projection geometry to output a wide viewing angle image by using the correction parameter, and a wide viewing angle image packaging unit for encoding the input image, the correction parameter and the projection geometry to generate a wide viewing angle image package. A method for processing a wide viewing angle image may be performed using the apparatus.

Abstract: A wide viewing angle video processing system comprises: a transmitting device configured to extract a plurality of background images and one or more foreground videos from an original wide viewing angle video, and to transmit the extracted plurality of background images and one or more foreground videos; and a display device configured to receive the plurality of background images and the one or more foreground videos from the transmitting device, to generate a wide viewing angle background image by combining the plurality of background images, and to generate a reconstructed wide viewing angle video in which the one or more foreground videos are composited on the wide viewing angle background image, and to display the reconstructed wide viewing angle video. The wide viewing angle video processing system can implement a wide viewing angle video having super resolution, which overcomes decoding limitations in conventional virtual reality devices.

Abstract: A simulation apparatus may comprise: a sensor unit configured to acquire movement information of an object using one or more sensors; a direction calculation unit configured to calculate direction information of the object using the movement information; and a simulation unit configured to simulate a physical object and render an image of the physical object on the basis of the direction information received from the direction calculation unit. The direction calculation unit may include a time delay correction unit configured to correct the direction information using a time difference between the time of acquiring the movement information and the time of rendering the image.

Abstract: Exemplary embodiments relate to a system for picking an object based on view-direction including a transmitting device configured to extract an object region including an object from an original image, and transmit an object masking image of the extracted object region and the original image, and a playing device configured to receive the object masking image and the original image from the transmitting device, display the original image, and pick the object in the displayed original image based on view-direction of a user viewing the original image, and a method for picking an object based on view-direction through them. According to the present disclosure, it is possible to overcome the limit of decoding of conventional virtual reality devices and enable picking in an image with ultra high resolution.

Abstract: A head-mounted display (HMD) may include a sensor unit, a display unit configured to display an image, and a control unit for measuring a tapping applied to the head-mounted display from a measurement value obtained by the sensor unit, and controlling the image displayed on the display unit by using the tapping as an input signal. When the HMD is used, an image displayed on the HMD may be controlled by using a tapping applied to the HMD as an input signal, and thus, an event may be processed without using any additional controller.

Abstract: A simulation apparatus may comprise: a sensor unit configured to acquire movement information of an object using one or more sensors; a direction calculation unit configured to calculate direction information of the object using the movement information; and a simulation unit configured to simulate a physical object and render an image of the physical object on the basis of the direction information received from the direction calculation unit. The direction calculation unit may include a time delay correction unit configured to correct the direction information using a time difference between the time of acquiring the movement information and the time of rendering the image.

Abstract: A head-mounted display (HMD) may comprise: a sensor unit configured to measure the movement of a user wearing the HMD; a display unit configured to display an image; and a control unit configured to calculate the user's sightline direction from a measurement value from the sensor unit and, when the user's sightline direction satisfies a preset condition, control elements of the image other than the viewpoint using the user's sightline as a input signal. When the user's sightline direction satisfies the preset condition, the HMD controls the image, which is displayed on the HMD, using the user's sightline as an input signal, thereby performing event processing and the like without any separate controller.

Abstract: A user viewpoint related image processing apparatus includes: a sensor unit configured to sense a viewpoint change of a user and generate motion data, a communication interface unit configured to receive an image package including image data from a media server, a scene constructing unit configured to, using the image package, place a virtual camera in a virtual space and construct a scene for the image data, and a virtual camera pose changing unit configured to, using the motion data, change a pose of the placed virtual camera to respond to the viewpoint change of the user.

Abstract: A head-mounted display (HMD) may include a sensor unit, a display unit configured to display an image, and a control unit for measuring a tapping applied to the head-mounted display from a measurement value obtained by the sensor unit, and controlling the image displayed on the display unit by using the tapping as an input signal. When the HMD is used, an image displayed on the HMD may be controlled by using a tapping applied to the HMD as an input signal, and thus, an event may be processed without using any additional controller.

Abstract: A method of transmitting a video to a receiver including a head-mounted display (HMD) over a network includes: determining at least one of a transmitter to transmit wide viewing angle video data and a receiver including a HMD to receive the wide viewing angle video data based on information stored in a user equipment or a relay server, and transmitting the wide viewing angle video data from the transmitter to the receiver through a transmission channel over a wide area network. A sender or recipient of a video selects a recipient or a sender using a local directory stored in a user equipment of the sender or recipient, or a user directory or public information stored in a communication service server, for example, a social network service (SNS), a messenger service, and a web site.

Abstract: A method of cloth simulation using a constrainable multigrid is provided. The method includes steps of: calculating a change of geometry of the mesh of nodes at a plurality of time steps using a multigrid method by solving a time-varying partial differential equation at multiple resolutions or levels; providing a hierarchical mesh through restriction or coarsening by down-sampling from level m to m?1 or prolongation or interpolation by up-sampling from level m to m+1; transferring soft constraints between different hierarchical levels using a damper-based constraint method; updating the position vector x and the velocity vector v of the mesh nodes; and displaying an updated state of the mesh of nodes using updated position vector x and velocity vector v on a display.

Abstract: A user viewpoint related image processing apparatus includes: a sensor unit configured to sense a viewpoint change of a user and generate motion data, a communication interface unit configured to receive an image package including image data from a media server, a scene constructing unit configured to, using the image package, place a virtual camera in a virtual space and construct a scene for the image data, and a virtual camera pose changing unit configured to, using the motion data, change a pose of the placed virtual camera to respond to the viewpoint change of the user.

Abstract: An apparatus for processing a wide viewing angle image may include: a correction parameter generating unit for analyzing an image input from a camera to generate a correction parameter, a projection geometry generating unit for generating a projection geometry to output a wide viewing angle image by using the correction parameter, and a wide viewing angle image packaging unit for encoding the input image, the correction parameter and the projection geometry to generate a wide viewing angle image package. A method for processing a wide viewing angle image may be performed using the apparatus.

Abstract: A fluid simulation system may include: a state processing unit for defining a corresponding cell after restriction as a Dirichlet cell in the case a Dirichlet cell is present among cells before restriction, defining the corresponding cell after restriction as a Neumann cell in the case a Dirichlet cell is not present and a Neumann cell is present among the cells before restriction, and defining the corresponding cell after restriction as an interior cell in the case a Dirichlet cell and a Neumann cell are not present among the cells before restriction; a restriction operating unit for calculating a residual value of a corresponding interior cell after restriction by adding residual values of interior cells before restriction; and a prolongation operating unit for calculating a residual value of corresponding interior cells after prolongation by dividing a residual value of an interior cell before prolongation by the number of the corresponding interior cells after prolongation.

Abstract: A cloth simulation system is provided which comprises a position calculation module calculating relative positions of adjacent vertices among a plurality of vertices on the cloth in the next time step, using the positions of the vertices in the previous time steps; an analysis module establishing an equation of motion of the respective vertices using the relative positions; and an updating module updating the positions of the respective vertices using the equation of motion, whereby the texture and reality of cloth is increased furthermore, a motion of the cloth is calculated in real-time, so that there is no inconvenience to fabricate clothes animation in advance depending upon the number of the motions of to-be-expressed object, thereby considerably reducing the fabricating costs and period.

Abstract: Deformations occurring in cloth can be decomposed into two components: the in-plane and the out-of-plane deformations. Stretch and shear are in-plane deformation, and bending is out-of-plane deformation. In the method, the numerical simulation can be done in real-time, and the models fix some flaws that existed in previous real-time models, leading to conspicuous reduction of artifacts. The (|x|?C)2 in the energy function is replaced with |x?x*|2 for some constant vector x*, such that the force Jacobian becomes a constant, which obviates solving the large system of linear equations at every time step. The method uses simplified physical models for both edge-based and triangle-based systems.

Abstract: A cloth simulation system is provided which comprises a position calculation module calculating relative positions of adjacent vertices among a plurality of vertices on the cloth in the next time step, using the positions of the vertices in the previous time steps; an analysis module establishing an equation of motion of the respective vertices using the relative positions; and an updating module updating the positions of the respective vertices using the equation of motion, whereby the texture and reality of cloth is increased furthermore, a motion of the cloth is calculated in real-time, so that there is no inconvenience to fabricate clothes animation in advance depending upon the number of the motions of to-be-expressed object, thereby considerably reducing the fabricating costs and period.

Abstract: A method of simulating the movement of cloth and a computer-readable medium storing a program which executes the method of simulating the movement of cloth, wherein cloth deformation by compressive force is simulated by an immediate buckling model when the compressive force is applied to two extremities of a deformation unit which models the cloth, cloth deformation by stretching is simulated by a spring model, and hysteresis phenomenon of cloth is simulated by using spring-slips for modeling. The immediate buckling model is based on a model of the present invention in which a deformation unit is not contracted by compressive force and generates an immediate bending deformation.